How To Replace An Engine Flywheel

18 August 2017
 Categories: , Blog

If your vehicle's clutch vibrates when you use it, you smell a burn, or you have trouble shifting gear, the engine flywheel may need replacing. The flywheel is part of a transmission that attaches to the crankshaft through a torque converter.

 The starter pushes on the flywheel gear, which can eventually cause damage. possible for a novice mechanic to replace the flywheel by following these directions.

Prepare to Replace the Flywheel

To replace the flywheel, you need:

  • work gloves
  • transmission
  • jack and jack stands
  • shop rags
  • drip pan
  • adjustable pliers
  • flare-nut wrench
  • torque wrench  
  • carburetor cleaner
  • transmission fluid

Before you replace the part, ensure the engine has cooled around an hour, then park the vehicle on a hard surface. Lift the front end of the vehicle on a jack, and support the back wheels with jacks stands.

Remove the Old Flywheel

Raise the hood, and look for the flywheel, a metal disc in manual transmissions, which commonly attaches to the crankshaft in the back of the engine. An automatic transmission will have a flexible disc. If you can't find it, consult your manual.

Look for the drive shaft and remove the nut on each side. Remove the differential (a device that controls wheel speed between  wheels), and detach the bolts and nuts with a wrench, 

Slide a drip pan where the drive shaft connects to the transmission, and disconnect the transmission coolant lines using the flare-nut wrench. Disconnect the shift linkage line and speedometer cable with the adjustable wrench, and set parts aside. 

Detach the retaining nuts on the transmission, and push it to the back to expose the flywheel. Use the wrench to disconnect the flywheel bolts, and move the flywheel away from the crank shaft to remove it carefully, since it is heavy. 

If the flywheel turns as you remove the bolts, get an assistant to secure it with a flywheel holder. Save the metal plate in the middle, because it can be inserted in the new flywheel.

Check the main crankshaft seal and freeze plugs, if applicable. Flywheels with minor damage usually can be resurfaced. by an automotive machine shop. .

Install the New Flywheel

Clean the new or resurfaced flywheel with carburetor cleaner. Reinstall the transmission line, and slide the new flywheel in place on the crankshaft; aligning the holes with the torque converter holes.

 Screw the metal plate below the bolt heads, then torque the bolts in place to the required pounds, which is commonly seventy to eighty. Reinstall the drive shaft and coolant lines, tighten connections, then add fresh transmission fluid.

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