I have a 1996 Yukon 5.7 after replacing the starter twice and flywheel I found out the engine is a 1998 or 1999 that requires a different starter. Now I have replaced that twice. When the starter is first replaced it runs fine for a while then I hear the grinding and diffuculty starting every now and then until it is a contant. Help!
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Sometimes new starters have to be shimmed so that the gear on the starter lines up with the gear teeth on the flywheel on the motor. The grinding noise is the reason I say that is what's wrong. If there were shims already there, try taking them out. I hope this helps you
It could be either the flywheel or the starter. If it's grinding, don't try it again until you've removed and examined the starter and flywheel. If the starter solenoid isn't fully engaging the bendix, it will cause the gear to grind; replace or rebuild the starter if that's the case. But you should examine the flywheel to see if it is seriously damaged from the problems you've had. Put a mark on the flywheel using a magic marker, then examine the flywheel as you slowly turn the engine by hand. (make certain that the ignition is off when you do that, you don't want anything bad to happen to your hand.) The mark on the flywheel will indicate when you've been able to examine the all of the teeth on the starter ring.
it sounds like you have the wrong starter or flywheel on the truck. aif the transmission has ever been changed, it may have been changed with the wrong size. the bolts line up fine to fit the engine, but the flywheel is too small or the tooth size is off
i suggest removing the flywheel inspection cover, and rolling the engine over a little bit at a time, checking to make sure that there are no worn or broken teeth. also, make sure there is no lateral movement, which could indicate a broken flexplate. good luck.
Did you replace the starter yourself or did someone else do it? Sounds to me that someone forgot to put the shimms back in, they go between the starter and the engine block where it bolts up. Without the shimms the starter will be to close and the teeth on starter drive will not engage teeth on flywheel.
The flywheel doesn't usually grind into the flywheel it's usually the other way around. The starter upon trying to crank the engine over will make a grinding noise. This is the sign of a bad starter drive in the starter and it will need a new starter. The longer you wait on getting this repaired the more damage will be done to the flywheel and this is a very costly repair because the motor and transmission needs to be seperated apart from each other to pull the flywheel out and replaced.
Hope this helps keep, us posted.
that sounds correct what happens is the starter still tries to engage the flywheel and grinds the teeth off both. Replace switch then worry about starter flywheel if it starts fine don't worry about it you may have saved it if you didn't let it run that way long