i have a 1981 Camaro Z28 with a 355ci motor. the casting numbers are
3970010. im having problems with the starter. i have replaced the 168
tooth flywheel. replaced the starter. tryed shimming it. but nothing seems
to work. if i drop the starter off and bolt it back on it will work for 1
time. then it grinds again. but when it warms up a little it will gring
again. im not sure what is wrong with it, but if anyone has some advise
please tell me.
Do you have a staggered bolt pattern starter installed or the strait
bolt pattern. I believe that you need a staggered bolt pattern
starter for the 168 tooth flywheel/flexplate and a strait pattern for
the 154? tooth.
68' Camaro RS
88' Firebird Formula
00' Mustang GT Vert
Yes the 168 tooth takes the stagered bolt starter and the 153 tooth takes
the straight across bolt style nose piece.
What you need to do is put a 1/8 " pin or drill bit in between the starter
shaft and the flywheel to check for proper shimming. The 1/8" should just
fit in between the flywheel teeth and the starter shaft itself. If it's too
tight you'll need to install full shims to get the required fit. If it's too
loose in there then cut a shim in half and install it on the outside bolt of
the starter.(in between starter and block). I've already had a few weird
blocks or starters that have required up to 2 of the1/2 shims to make up the
Also key things are... make sure the rear support is on the starter... ( the
bracket from the block to the rear of the starter) I've seen so many of them
trown away and they are important to starter health... Make sure it's tight
and you shoud be ok as long as you haven't ruined any teeth yet.
Good Luck I hope this helps...
i finnally fixed it. i bought a 305 starter. the 305 starter has a closer
centerline then the 350 starter by about 2 or 3 millimeters. which was the
perfict space. i ordered a suport bracket today. it will be here by this
Thanks for all of the help guys.
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