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Instruction:DIESEL INJECTOR PULLER SET - 14 PIECE

Introduction&contents Suitable for the fast and safe removal of Bosch, Delphi, Denso, and Siemens diesel injectors. Set includes keys and deep, open profile sockets used to dismantle injectors plus adaptors for attaching the slide hammer securely to the body of the injector. Ball joint allows hammer to be used in confined areas. Contents: (refer to fig.1) Item Description1. Sliding Hammer2. Handle3. Shaft4. Ball Joint Adaptor (3 piece)5. Adaptors - (5 Pieces - 4 internal thread, 1 external thread) 6. External Adaptor - (3 piece)7. Security Hex Key - ½"sq. drive8. Sockets - (4 pieces - M25, M27, M29, M30 - ½"sq. drive) Assembly 1. Referring to the individual components in fig.1. assemble the Injector Puller as shown in fig.2. overleaf. 2. Use adaptor 6 when the injector is being extracted using the external thread revealed when the injector cap has been removed. 3. Use one of the adaptors (5) when the injector is being extracted using the internal thread revealed when the inner sleeve has been removed from the injector. Operation NOTE:The technique required for removal of the injector will depend on which system is fitted to the vehicle. Always use an external adaptor first if possible. If by using reasonable force the injector cannot be removed, use an internal adaptor. 1. Before working on the fuel system, make sure that the fuel system is not pressurised. Refer to the manufacturer's instruction manual on how to de-pressurise the system.1.1. Disconnect the injector wires and connections as per the manufacturer's instructions.1.2. Remove any carbon build up from around the injector.1.3. Remove the cap from the injector using the appropriate size socket (8). Refer to fig.3.A.2. Use of external adaptor (fig.3). 2.1. Identify the external thread adaptor (6) and separate the inner black part from the outer silver part by removing the screw from the top of the adaptor. 2.2. Position the black part inside the top of the injector (see B) then place the silver part over it, and screw it down firmly onto the external threads revealed when the cap was removed. 2.3. Install the screw securely thus locking the adaptor parts tightly together with the injector thread and wall in between. This ensures a more secure fastening and reduces damage to the injector threads. 3. Use of internal adaptor (fig.4).3.1. Remove the internal parts from the injector to gain access to use the security hex key (7). It may be necessary to remove the injectorveins by force. Insert the security hex into the inner sleeve (see D). Turn the security hex anti-clockwise using a 21mm socket to remove the inner sleeve.3.2. Screw the appropriate internal adaptor (5) into the threads of the injector and tighten with a suitable spanner (see E).4. Removing the injector.4.1. Screw the slide hammer assembly (handle, shaft and sliding hammer) securely onto the adaptor.4.2. The injector can now be removed using reasonable force on the slide hammer. Be prepared for the sudden release of the injector from the cylinder head.4.3. If the injector cannot be removed, it may be necessary to consult a main dealer or a diesel specialist, to avoid damage to the engine.4.4. When an injector has been removed, it is recommended that only a new or refurbished injector is fitted. Follow manufacturers fitting and safety instructions

Operating Instructions:B1045 DNT tie rod end puller

Outer Tie Rod Remover / Separator If applicable, remove the snap ring from the control arm or ball joint Operating Instructions1. Remove the outer tie rod retaining nut.2. Position Outer Tie Rod Remover on the outer tie rod assembly as shown in right.3. Tighten the forcing screw on the tool to separate the outer tie rod from the steering knuckle assembly

instruction for ball joint removal tool (Fork type)

Ball Joint Separator (fork type) Can be used for tie rod end, pitman arm and ball joint removal.This type of tool (wedge) will damage the dust seal on the parts that are removed with this tool. If you are reusing any of these parts use the damage free type of tool. INSTRUCTIONS:Always wear safety glasses and gloves.1. Loosen fastener nut, but do not remove completely.2. Place “wedge” between the two parts being separated.3. Using hammer strike wedge until it separates.4. Remove the fastener nut completely and replace the part.Note: Always replace locking hardware-cotter keys, etc.

INSTRUCTIONS FOR PITMAN ARM PULLER-JOINT REMOVAL TOOL

Pitman-Tie Rod Puller For removing pitman arms from steering box.INSTRUCTIONS:Always wear safety glasses and gloves.1. Lubricate pressure screw before using. 2. Remove fastener nut holding pitman arm on steering sector shaft.3. Select correct puller sliding legs (A) over pitman arm.4. Center pressure screw (B) over sector shaft. 5. Using 17mm or 11⁄16” open end wrench, tighten pressure screw (B) enough to apply a hard preload on the Pitman arm.6. Using a hammer, strike the “ball part” of pressure screw (B) until the Pitman arm comes off.                                                                                               More                                                                                  A. Pressure Screw                                                                                  B. Jaw Legs

product instruction:BALL JOINT SERVICE SET FOR 2WD&4WD VEHICLES-DN-B1041

ball joint press tool set WARNING: TO HELP PREVENT PERSONAL INJURY ● Always wear ANSI approved goggles when using this product. Normal use of this product is likely to expose the user to dust and/or microscopic particles containing chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Always wear appropriate safety equipment and clothing when using this product.   ● Study, understand, and follow all instructions provided with this product.   ● Before repairing vehicle, block the wheels to prevent the vehicle from moving.   ● Check the final alignment of the C-frame press and all tooling with components before exerting pressure to remove or replace a ball joint.  OPERATING INSTRUCTIONS To Remove a Ball Joint 1. Assemble the Ball Joint Press (1) over the vehicle’s control arm. Select the correct size Receiving Tube (3, 4, or 5), and position it under the vehicle’s ball joint. 2. Place the Removal Adapter (7) between the Receiving Tube and the Jackscrew (2).3. Then, place the Installation Adapter (6) between the top of the ball joint and the Ball Joint Press. See Figure A. 4. Tighten the Jackscrew until the Receiving Tube contacts the vehicle’s control arm.5. Check the alignment of all the Ball Joint Kit parts, and continue tightening the Jackscrew until the vehicle’s ball joint is removed. To Install a Ball Joint 1.Clean the vehicle’s control arm, and coat the inside diameter of the control arm with a light lubricant. 2. Insert the replacement ball joint as straight as possible into the vehicle’s control arm. 3. Assemble the Ball Joint Press over the vehicle’s control arm. Select the correct size Receiving Tube and position it on top of the vehicle’s control arm. See Figure B. 4. Place the Installation Adapter between the Receiving Tube and theBall Joint Press. Then, place the Removal Adapter between the ball joint and the Jackscrew. 5. Check the alignment of all the Ball Joint Kit parts. Then, tighten the Jackscrew until the vehicle’s ball joint is firmly sealed To Remove and Install Brake Anchor Pins 1. To remove the brake anchor pins, remove all lock ring retainers from the Brake Anchor Pins. 2. Position the Ball Joint Press over the brake spider. 3. Tighten the Jackscrew until the anchor pins can be removed. See Figure C.4. To install the brake anchor pins, insert the brake anchor pins. Then reinstall the lock ring retainers on the brake anchor pin. 5. Unscrew and remove the Ball Joint Press. To Disassemble / Assemble a “U” Joint 1. To disassemble a “U” joint, remove any external and/or internal lock rings.2. Position the Ball Joint Press around the drive shaft yoke and tighten the Jackscrew until the first bearing is removed. See Figure D.3. Reposition the Ball Joint Press and remove the second bearing.4. To assemble a “U” joint, clean all dirt and oil from the yoke area.5. Align the replacement bearing and Ball Joint Press as straight as possible over the yoke. Press the replacement bearing into the yoke, and reassemble the external/internal lock ring.  6. Reposition the Ball Joint Press and second replacement bearing as straight as possible over the yoke, and press the bearing into the yoke.7. Reassemble the external/internal lock ring. Parts List & Diagram Part Description Qty 1 Ball Joint Press 1 2 Jackscrew 1 3 Receiving Tube (2-1/4″ L x 2.723″ I.D. x 3″ O.D.) 1 4 Receiving Tube (1-3/4″ L x 2-1/4″ I.D. x 2-1/2″ O.D.) 1 5Receiving Tube (1-3/4″ L x 1-3/4″ I.D. x 2″ O.D.)16Installation Adapter (1.122″ L x 0.941″ I.D. x 3″ O.D.)17Installation Adapter (1.122″ L x 0.941″ I.D. x 3″ O.D.)18Installation Adapter (1.122″ L x 0.941″ I.D. x 3″ O.D.)19Receiving Cup (2-1/2″ L x 2″ I.D. x 2-1/4″ O.D.)110Install Cup Adapter (0.845″ L x 1.879″ I.D. x 2-1/4″ O.D.)1

Basic Steps in Casting Process

Basic Steps in Casting Process While each casting method creates unique challenges and process enhancements, all techniques retain the same basic steps. These steps are:● Patternmaking● Coremaking● Molding● Melting and pouring● Finishing● PatternmakingTo create a casting mold, a manufacturer must first design a physical model. The process of fabricating this model is called patternmaking. Using computer-assisted design (CAD) systems, the manufacturer designs dimensions and geometry of a mold, and then packs an aggregate material, such as sand, concrete or plastic, around the pattern. Once the pattern is removed, the mold cavity in the sand can be filled.CoremakingMany part designs require the inclusion of cores in the casting mold. Cores are solid materials placed inside the mold cavity to create interior surfaces of a casting. For example, a metal pipefitting will require a cylindrical core inside the mold cavity to create the hollow construction of the component's interior.MoldingAt this point, the manufacturer can create the casting mold. A material such as sand, plaster or wax is used in expendable mold casting, whereas metal and other durable materials are used in non-expendable mold casting techniques. The material fills the casting mold model and is allowed to harden, at which point the manufacturer removes it from the cavity and the casting of the component can now begin.Melting and PouringMetal must be properly melted prior to being placed in the mold. Typically, this is done by using what is known as a crucible. Crucibles are containers made of porcelain or another melt-resistance substance in which a manufacturer can heat a metal beyond its melting point. Once properly melted, the molten metal is poured into the casting mold to cool and harden.FinishingBecause metal can sometimes fill in cracks in a casting mold or sprues, the pouring channel for the mold, manufacturers must often finish the metal following casting. This can be accomplished through a variety of finishing techniques, including sanding, grinding and buffing. Once proper appearance and surface texture has been achieved, further post-treatment processes such as painting or electroplating may be necessary for some applications.

Are there any alternatives to a nut splitter,how many ways to extractor rust nuts?

Are there any alternatives to a nut splitter,how many ways to extractor rust nuts? There are several tools and techniques for trying to remove a rusted or damaged nut. In most cases these methods will be tried before using a nut splitter – once these other techniques and tools have failed a nut splitter may be the only option left. No.1  Penetrating oil This is often the first thing to be tried on a nut that’s corroded onto a bolt or stud. Spray this onto the nut and it penetrates the corrosion, dirt and grime that is seizing the nut onto the bolt. Penetrating oils also contain lubricants that that reduce the friction between the nut and the bolt’s threads, making it easier to turn the nut. No.2  Heating the nut This technique involves using a blow torch or oxy-acetylene torch to heat one side of the nut, it is often used in automotive workshops. As it is heated the nut expands and so breaks the rust that is holding it tight on the bolt.Once the nut has been heated, remove the torch and apply paraffin wax to the cooler side of the nut. This will cause the wax to melt and be drawn by a capillary action into the threads of the nut and bolt, where it acts as a lubricant. Leave the nut to cool and then try removing it again. This technique can obviously only be used in certain circumstances. No.3  Freezing the bolt This method works on the same principle as heating the nut, but instead causes the bolt to contract, thus breaking the rust that is holding on the nut. Freeze sprays are simply sprayed onto the bolt and as they contain penetration oil as well as a freezing agent, once the rust bond with the nut is broken the penetrating oil can work into the bolt’s threads, making it easier to remove the nut. No.4  Tapping the nut with a punch This is the technique often used on a damaged or rounded nut that can no longer be turned with a socket or spanner. First a small indent is created on the nut’s flat by tapping the punch with a small hammer at a right angle to the nut, into the centre of one of its flats.The punch is then angled over in the indent you have created, so that as it is struck with the hammer it forces the nut to turn slightly in an anti-clockwise direction. The process of creating an indent and forcing the nut to turn slightly may to be repeated several times before the nut can be removed.This technique not only damages the nut so it can not be reused, it requires plenty of access around the nut for you to use the punch and swing a hammer, as well as taking a lot of time. Because of this, if you have a nut splitter available you will often be able to remove the nut with it in less time and with less risk of damaging the item the nut is attached to.

What are the different types of nut splitter?

What are the different types of nut splitter? How many type of Nut Splitter?Nut splitters can have either a screw action or hydraulic action, with a ring-frame or C-frame design.◆ Ring frame nut splitter◆ C-frame nut splitter◆ Hydraulic nut splitter Ring frame nut splitter As the name suggests the frame of a ring-frame nut splitter forms a ring that completely encircles the nut you wish to remove.This type of nut splitter will often lack a flat anvil opposite the chisel, instead using the inside of the ring-frame to pinch the far side of the nut as the chisel is driven into the nut’s flat.As the ring frame fully encircles the nut it is stronger than a C-frame nut splitter. However, this also makes the frame larger and can sometimes prevent the nut splitter from fitting nuts in confined spaces. C-frame nut splitter The C-frame nut splitter looks similar to a G-clamp. As one end of the frame is open and it does not fully encircle the nut it is possible to get a C-frame nut splitter into more confined spaces than a ring-frame one.This nut splitter design usually comes with a rotating chisel that allows you to use it at various angles, which again enables it to access nuts you may not be able to with a ring-frame nut splitter.The rotating chisel is first adjusted with a hex key so that there will be a minimal gap between it the nut and the anvil. Then keeping the chisel square to the nut’s flat the C-frame nut splitter is positioned over the nut, before the screw at the end of handle is turned to press the anvil up against the opposite flat of the nut. This is continued until the chisel splits the nut.However, as the C-frame doesn’t completely encircle the nut it is not as strong as a ring-frame nut splitter. To combat this weaker design, the C-frame is made of thicker material than the ring frames of other nut splitters. Hydraulic nut splitter Hydraulic nut splitters use a hydraulic ram instead of a screw to drive the chisel into the nut’s flat. This enables them to apply far more force to the chisel than can be achieved with a screw.The greater force applied to the chisel along with harder chisel materials allows hydraulic nut splitters to remove larger and harder nuts than is possible with a  screw nut splitter. This type of nut splitter is only found with a ring frame design in order to cope with the force exerted by the ram .Hydraulic nut splitters are powered by a separate hydraulic pump. This pump can itself be powered by hand, electricity, pneumatically (compressed air) or petrol.Hydraulic nut splitters cost considerably more than a screw action or C-frame with hydraulic screw action nut splitter. This means they are rarely used outside of heavy industry and very specialist applications.

Can you delivery tools to FBA warehouse?

Can you delivery tools to FBA warehouse? Yes,If you sell tools in Ebay ,Amazon,wish,etc,we can help you to logo customized ,packing designed or customized,And all FBA warehouse required,and delivery to your FBA warehouse. Which port will be loading? Ningbo Port or Shanghai Port is common.because We located in Ningbo City,only 40 Min to Ningbo Port and 2.5 hours to Shanghai Port. How do you make our business long-term and good relationship? 1. We keep good quality and competitive price to ensure our customers benefit ; 2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from. Can you made tool according sample or drawing? and How to control the quality of tools? Yes, we accept. because we are a factory and own R&D team, if you offer the sample, we will draw the drawing and to make if you offer drawing, we also can make it for customers.Our QC Man will check all products step by step from material to finish according to the drawing.

WHAT IS A SILENT BLOCK AND WHY IT HAS TO BE REPLACED

WHAT IS A SILENT BLOCK AND WHY IT HAS TO BE REPLACEDSilent block is a small detail of the car's suspension, which consists of two metal sleeves, inserted one into the other, the gap between which is a rubber insert. Silent blocks are used to connect parts of the automobile suspension, they soften vibrations transmitted from one part to another while driving a car. In addition to the suspension, rubber-metal joints (silent blocks so often referred to) are mounted to other vehicle systems: engine, gearbox, lever mounting, are used in the stabilizers and shock absorbers and other elements. While exploitation of auto – silent blocks have a huge load, that is why its  condition is have to be checked, replacing as necessary any worn silent block on the new one. It is advisable to check the condition of the silent block every 50 thousand kilometers. To determine the status of rubber joints suspension need to post on the queue the front and rear of the car, check the levers for play and visually check the suspension silent block. Carefully inspect the silent block: if it is cracked or peeling, then the bushing must be replaced.This seemingly minor detail, such as silent block affects the health of the entire chassis of the car. Wear bushing affects the handling of the car, hurting her, especially when driving at high speeds. Also, a worn bushing can cause a nasty squeaks in the suspension, the emergence of a backlash and a tangible machine roll. Not replaced in time  the worn silent block, can deform the lever, which subsequently will entail costly repairs.We not advise to replace suspension silent block on your own, it will be safer to contact the professionals at workshop. For a quality installation requires special equipment and a competent master, having experience of similar work. In the result of an illiterate replacement bushes during operation, problems can occur, and a new bushing ahead of time will fail. For example, if you replace the suspension silent block of ignorance fully tighten the nut axis of the lever when the car is in limbo, the silent will soon be turned out and unusable.To change silent block at the automobile workshop or on your own  – is the choice of yours. The most important thing is such important details as the silent block  was  fine and the car stays on the road with confidence, providing your safety.

How to use the universal oil filter wrench

The oil filter wrench is mainly used to disassemble and assemble the oil filter. It can be divided into belt type, clamp type, chain type, three-jaw type and cap type. Because the size and position of the oil filter element of different engines are different, some wrenches are not completely suitable for the vehicle type used. Among these wrenches, the universal oil filter wrenches are the chain type and the three-jaw type.How to use the oil filter wrench?A wrench is a hand tool that uses the principle of leverage to turn bolts, screws, nuts, and other threads to hold the openings or sleeves of bolts or nuts. Wrenches are usually made with clamps on one or both ends of the handle to apply external force to the handle to apply external force to turn the bolt or nut to hold the bolt or nut opening or sleeve. When in use, an external force is applied to the handle along the thread rotation direction, and the bolt or nut can be turned, thereby achieving the purpose of disassembling and assembling the oil filter element.Is there a universal oil filter wrench?Both the chain type and the three-jaw type are universal oil filter wrenches, because the size of the parts of different models is different, and the corresponding specifications need to be equipped. Moreover, the shapes of the parts of the oil filter are not all the same, and it is necessary to find and use different forms of oil filter wrenches accordingly. There are many types of oil filter wrenches, each of which has its own advantages. For most cars, the best one should be the cap type, because it can be seamlessly interlocked with the filter, there is no damage to the filter, and it is easy to buy on the market.The oil filter element has an irreplaceable important position in the engine. If the oil filter element is damaged, even if the best oil is used, impurities will enter the engine and cause it to be damaged. Therefore, many car repairers will suggest that the owner check the oil filter element when changing the oil, and replace both at the same time.

Can you delivery tools to FBA warehouse?

Q: Can you delivery tools to FBA warehouse?A: Yes,If you sell tools in Ebay ,Amazon,wish,etc,we can help you to logo customized ,packing designed or customized,And all FBA warehouse required,and delivery to your FBA warehouse.

Rotate Tires

Rotate TiresOn many cars it is very simple to rotate tires. You just remove them and move them to the appropriate spot (front to back, back to front), then re-install them.In the last few years however this have become a much more difficult job. Most cars these days have what is called a "Tire Pressure Monitoring System" or TPMS. There are also a lot of "all wheel drive" cars on the road. These two things make rotating your cars tires more difficult. It can still be done, but you need much more info and, in some cases, specialized equipment in order to do this job.What is TMPS and How Does it Work?The primary reason that it is becoming harder to rotate tires is because of what is called TPMS or Tire Pressure Monitoring System. This system does just what its name suggests. It monitors the pressure in your tires to be sure that they are properly inflated giving you increased tire life and better gas mileage. It can also alert you if you are about to lose tire pressure while driving.What's the big deal you ask? Well the "problem" with these systems is that each tire must have a sensor inside of it that can tell the computer how much pressure is in it. This would not normally pose a problem, but each of these sensors are "marked" by the computer so the cars computer knows which tire is which.This means that the computer knows the difference between the right front tire and the right rear tire.When "Joe Carowner" goes to rotate their tires the computer can no longer tell which tire is which and it will turn on a light on in the instrument panel. This light will not go out until it is reset.How to Reset TPMS LightMost TPMS sensors have to be reset using a scan tool whenever the tires are rotated and some of them even have to be reset even when you are just putting air in the tire.Starting in 2008 the government requires that car manufacturers use this system on their cars. This means that your car has this system if it was made after 2008. Many cars that were made before this date have this system so be sure to check your owners manual before you try to do anything related to your tires.You can buy a scan tool that will re set this system at most any auto parts store or you can take your vehicle to your local mechanic to have it done. Some auto part stores can reset them as well. To troubleshoot, repair and maintain your vehicle, you'll need diagnostic and repair information that is specific to your car or truck. For this I personally use and recommend ALLDATAdiy. With full manuals for over 30,000 vehicles online, you will find an exact match for your vehicle's year, make and model.Besides being cheaper than a factory manual, they also offer step by step repair instructions and detailed diagrams beyond what is found in most printed manuals. Click here for a sample of their diagnostic and repair information. Should You Rotate Tires Yourself?If you have a scan tool that can reset TPMS codes or if your vehicle is not equipped with this system then you can do this job fairly easily. You will need to have a floor jack, jack stands and a basic set of hand tools, including a torque wrench. Then you simply put the tire that is on the front right on the back left and the tire that is on the back left goes on the front right. Then the same for the other side.I would say that if you have an older vehicle (2000 and older) then yes, you should be able to do this job fairly easily. If you have a newer car that does not have a TPMS system, also yes, but if it does have this system, then I would leave it to a professional.If you really want to do this job yourself then I recommend taking your car to a shop that has a TPMS scan tool so they can reset the sensors. You can also buy a TPMS reset tool for your car that would work as well. Some of these tools have a learning curve so be sure that you have read the instructions and feel comfortable before you try it yourself.If you still have any unresolved vehicle problems or questions, you can ask an auto mechanic online. For expert answers specific to your vehicle's make and model, I recommend JustAnswer Car. They have a large pool of certified mechanics to answer your questions for a small fee and you can also browse their answers to other users for free.

Check Engine Code P0401

What does P0401 code mean? Find what causes it and learn how to fix this check engine code from a mechanic who has done it countless times.This trouble code "insufficient EGR flow" means that there is not enough exhaust gasses flowing back into the incoming air to the engine. EGR stands for "exhaust gas recirculation". The EGR system consist of three parts: EGR valve, DPFE (differential pressure sensor EGR) and actuator solenoid.Car manufacturers created this system so already burned exhaust gas can flow back into the engine (when the EGR valve is open) and lower the combustion temperatures. This helps reduce emissions.This OBD code basically means that the cars computer has tried to open the EGR valve, but it cannot get enough exhaust gas into the engine. EGR systems used to be controlled by engine vacuum via hoses and valves. Now most of them are controlled by electrical solenoids.What Causes the P0401 Code?EGR ValveBlocked EGR PassagewaysEGR Control (No or Low Vacuum)Faulty solenoid or wiringLess Common CausesThe Cars ComputerDPFE (Delta Pressure Feedback EGR) ValveModulator ValveTo troubleshoot, repair and maintain your vehicle, you'll need diagnostic and repair information that is specific to your car or truck. For this I personally use and recommend ALLDATAdiy. With full manuals for over 30,000 vehicles online, you will find an exact match for your vehicle's year, make and model.Besides being cheaper than a factory manual, they also offer step by step repair instructions and detailed diagrams beyond what is found in most printed manuals. Click here for a sample of their diagnostic and repair information. How to Fix Engine Code P0401Each car manufacturer has their own EGR system design but the most likely two causes of this code are the valve itself or passageways (many times the intake manifold will have very small passageways that get clogged with soot) that the exhaust gasses pass through.Many times this code is caused by clogged EGR passages, and sometimes removing the sensor will give you access to the clogged EGR passages.Another thing that you can do yourself is to check all vacuum hoses and all wiring going to the EGR valve. You might find a hose with a hole in it or you could find a connector that is not seated all the way or some wiring that has been rubbed through.This fault code is a tougher one for a DIY mechanic to diagnose unless you have good experience and some specialized tools. Many times this code will go away if you replace the EGR valve (but not always). If you lack the skills or patience to diagnose this problem, you can consider giving it a shot and just replace the EGR valve.If you still have any unresolved vehicle problems or questions, you can ask an auto mechanic online. For expert answers specific to your vehicle's make and model, I recommend JustAnswer Car. They have a large pool of certified mechanics to answer your questions for a small fee and you can also browse their answers to other users for free.