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Anyone know how many shims should be between the starter and the block on a 75 350. My starter didn't have any and the bendix just slips on the fly wheel when you turn the starter over.
SLIDE :confused:
Have you checked the flywheel for wear? After a number of poor engagements, the flywheel teeth will wear and cause the starter gear to "slip" (thereby causing that wonderful, screaching, metallic, sprocket-tooth-grinding sound).
The flywheel is showing wear but I don't think it should be worn to the point of not catching on the starter. This enginge was rebuilt just before I bought the car and I think that the guy forgot to put the shims between the starter and the block. At least thats what I'm hoping!
No shims is as deep into the flywheel ring gear as the starter can go. If you add shims the starter will engage nearer to the outer end of the ring gear. It sound like you may have a bad starter drive (Bendix).
Are you actually trying to turn the engine over with the starter, the starter is rotating (you can hear and feel it), the solonoid has moved the bendix forward into the flywheel (you see/feel it) and then the engine doesn't rotate??? If all that's true then I agree it's the bendix. Have you tried to rotate the bendix by hand. It should rotate easy in one direction without turning the starter, but if you try to turn it the other way then it should engage and turn the starter. Also "hit" the starter to make sure which direction it rotates in and make sure the bendix "locks" when it turns in this direction and does "free-wheel". I suppose you could have the wrong bendix if you've just replaced it.
Oh, by the way have you replaced the flywheel with one that's smaller than the original????