If you feel the engine of your Chevy S10 vibrating more than usual, you may need to replace one or more of its motor mounts. Being familiar with the process will save you money and make you more familiar with how your vehicle works. Replacing motor mounts can be done by novice mechanics who have a basic understanding of auto mechanics.
- Skill level:
- Moderately Challenging
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Things you need
- Socket wrench, adaptors
- Floor jack
- Jack stands
- Torque wrench
- Replacement engine mount
Remove the negative and positive battery terminal cables if the engine mount on which you are working is close to the engine's cooling fan. Because there are several different versions of the S10, which has been manufactured for decades, where your engine mounts are located can differ from model year to model year.
Wait 15 minutes after removing the battery cables for any built-up charges to discharge within the electrical system. While you are waiting, inspect your car to see if you need to remove any other parts to get to the motor mount that you want to replace. Various models have different requirements for accessing the mounts and having enough room to work with them.
Use a floor jack to support the engine. Place the jack beneath the motor and jack it up so that it is supporting some of the engine's weight. At this point, you do not want to raise the engine, but lift the jack so that it begins to support the weight of the motor. Place the floor jack in the centre of the engine to balance the support. If you have two floor jacks, you can have a jack on both sides of the engine, increasing the stability while the mounts are disconnected. Alternatively, place a 1/2-inch-thick piece of plywood beneath the oil pan to help spread the force of the floor jack over a wider surface area while it is supporting the engine.
Undo the bolts that are holding the engine mount in place. Always remove the centre bolt last whenever unscrewing the bolts of the engine mount. If a normal socket wrench cannot produce enough force, you will need to use a torque wrench. You may also need a pry bar to remove the old engine mount.
Use a socket wrench or torque wrench to unscrew and remove the vertical mount insulator fasteners from the frame rail.
Remove the through-bolt access hole cover. You may need to pry it off with a flathead screwdriver if you cannot pull it off by hand. Pull out the through-bolt from the insulator assembly and then remove the insulator itself.
Reverse the above instructions for installing the new engine mount. Use the torque wrench to tighten the new engine mount to the rail fasteners at 60 foot pounds. Double check to ensure that the new mount is aligned exactly with the mount holes on the frame. Be sure to tighten the engine mount bracket through-bolt to 100 foot pounds. Lower the floor jack and your S10 should be ready to go.
Tips and warnings
- Use blocks of wood to support your engine. If your engine tips over and you or a body part is caught underneath it, you can suffer serious injuries.
- Even when the car is turned off, the cooling fan can still be turned on automatically by the car's computer. If you are caught by surprise in the circulating path of the fan's rotation, you could be seriously injured.
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