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| Whats this part? (Page 1/1) |
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frockfiero
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SEP 28, 03:44 PM
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This part fell out of my transmission (bell housing) when I separated it from the engine (1987 GT Getrag 5 spd) Does anyone know what it is? I believe it is the starter shim. How do I reinstall it?
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PhatMax
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SEP 28, 03:51 PM
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That’s a starter shim. Goes between the starter and block…..better check dem bolts !
The hole and the slot are where the bolts go thru.[This message has been edited by PhatMax (edited 09-28-2023).]
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Spoon
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SEP 28, 08:13 PM
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Those shims just don't fall out. My guess is the starter had to be replaced and someone laid the shim in the bell housing opening and forgot about it. If the new starter functioned properly, no binding, without the shim, then no need to put it back in. I've seen as many as 3 shims in GM starters so I believe the off-tolerance is with the starter housing and rather than the engine block.
Spoon
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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
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82-T/A [At Work]
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SEP 29, 08:32 AM
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| quote | Originally posted by Spoon:
Those shims just don't fall out. My guess is the starter had to be replaced and someone laid the shim in the bell housing opening and forgot about it. If the new starter functioned properly, no binding, without the shim, then no need to put it back in. I've seen as many as 3 shims in GM starters so I believe the off-tolerance is with the starter housing and rather than the engine block.
Spoon
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I've always removed and reinstalled these shims, but it occurred to me... is the shim based on clearance differences in the bellhousing, or the starter? And... what exactly (or should exactly) I be measuring to ensure that the tolerance is correct? Is this something I can visibly see if / when I install the starter? As I said, I've always just reinstalled them whenever I replaced a starter, but wondering how I could be doing this the right way. There are different sized shims, and I can't imagine the shim shouldn't/wouldn't change slightly with a new starter.
Thanks!
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fierosound
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SEP 29, 10:16 AM
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82-T/A [At Work]
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SEP 29, 10:34 AM
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Thanks!!! This is exactly what I was looking for.
Copy / paste from the link:
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Shimming is to address "Tolerance stacking" (Google that...) Starter, engine, flywheel as have +/- tolerance. Sometime all are on plus, all minus, but most are a mix.
If you use a shim, Do Not assumes that the old starter's shim setup is not automatically uses by the new starter or when Flywheel is switch/replace.
The correct starter clearance for traditional "2 bolt" GM starters is 1/8 inch between the starter motor shaft and a flywheel tooth pointing directly at the starter shaft. (Rotate the flywheel as needed to make that happen.) This method is recommend by starter marker/rebuilder.
You check the clearance with a section of 1/8-inch wire or a drill bit. (Drill bit must not be chuck chewed from being run loose) |
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