Pontiac 455 and my starter will not disengage - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-25-2012, 04:49 PM
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Pontiac 455 and my starter will not disengage

i have a pontiac 455 and my starter will not disengage...any suggestions?

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Old 11-25-2012, 05:06 PM
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i NEED help!!!

You can loosen the bolts to free up the bendix. It is sticking. You also need to check the clearance between the starter gear and the ring gear of the flexplate.
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Old 11-25-2012, 05:13 PM
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i have already tried that. i have also tried shimming it every way possible, a new starter, new flywheel, and even replaced my main bearings thinking that my crank might have moved out of place just enough to hang it up but nothing has worked \m/
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Old 11-25-2012, 05:18 PM
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Are you talking about it sticking if you try to start the car cold. Like it does not disengage when you turn the key off but didnt start the engine. But it comes loose as soon as the motor fires.

If that is the case you need a ford solenoid kit. They sell on summit for a few bucks just hook it up as the say you can wire one up yourself but the kits are so cheap its close to same price with instructions.

May also need a mini starter if its a big high compression engine.
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Old 11-25-2012, 05:20 PM
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Like this?
http://www.crankshaftcoalition.com/w...-_no_hot_start
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Old 11-25-2012, 05:21 PM
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it hangs up on my flywheel the whole time even after i shut the engine off. it just constantly keeps grinding and i have to force it to go back into the starter. right now i have the engine sitting on a stand and i have ran out of ideas...
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Old 11-25-2012, 05:28 PM
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Is the flex plate have real sharp teeth on it. This can grab the starter gear and force it to hang also add the rear support strap for the heavy duty starter.

Try to put a bunch of grease on the gear and see if that smooth things out if so maybe filing the teeth smooth can knock down any ridge.

Use more shims until it is moved away from the gear you have too much engagement when this happens usally.

Are you using a gm high tq starter or some other version.
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Old 11-25-2012, 05:39 PM
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no it's just a normal starter nothing fancy or anything, but i don't the back brace for it. could that possibly be it? and i have gone up to five shims!! and thought that was way plenty considering if i went any higher my bolts would barely fit
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Old 11-25-2012, 05:53 PM
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Yeah sometimes you need to get longer bolts. Are the teeth still deep in the gear at five shims?
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Old 11-25-2012, 05:57 PM
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Quote:
Originally Posted by transam221 View Post
no it's just a normal starter nothing fancy or anything, but i don't the back brace for it. could that possibly be it? and i have gone up to five shims!! and thought that was way plenty considering if i went any higher my bolts would barely fit
The back brace does help the starter stay alot more stable. And can be an issue. But i am wondering if you might not want to get a mini gear starter they are pretty cheap these days and can be adjusted to fit a little better.

I would try the longer bolts and more shims until only half the tooth is engaged.
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Old 11-25-2012, 06:05 PM
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yeah they're still in about half way and i thought 5 shims was too many. but guess i'll try more just to see what it does thank you!
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Old 11-25-2012, 06:15 PM
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yeah they're still in about half way and i thought 5 shims was too many. but guess i'll try more just to see what it does thank you!
My car had 5 thin ones and two thick ones under the starter when i got it. They all had to go back in. Until i switched to a geared starter i was able to get that to fit better.
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Old 11-25-2012, 06:26 PM
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gez! i just thought anymore then three would be to many since my bolts would barely tighten up
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Old 11-26-2012, 11:41 AM
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I actually purchase stock bolts only to find mine were longer than stock. You will need longer bolts. Also make sure they are grade 8 if you buy from hardware store.

I dont think the stock bolts will work if you need that much adjustment. I know i talked to a few poncho guys back in the day and they said the same thing.

One of them told me my starter had been surfaced during rebuilding and more shims will be needed. i did purchase a new high torque starter from gm and it did not need as many shims but still had the hot start issues with the high compression engine. Mini starter was the only real fix for me.

YOU CAN NOT use the shims if the bolts only grab a few threads. They must get a good bit or the starter will rip them out. Usally only trashes the bolts but not worth the chance. I think napa or other good parts store should be able to help you out with the right bolts.

FYI mini starters are about 100 to 150 bucks these days cheaper if you get a china one from ebay.

Hope this helps.
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