C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Starter help needed

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Old May 2, 2007 | 10:51 PM
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Default Starter help needed

Hi all,

A while back I instaled TPIS headers on my 86'. I also installed a generic Chevy small block mini-starter to make it easier to change in the future due to the tight fit with the headers. Ever since then the starter has never been quite right. I had it shimmed a couple of times, but it still misses (making that grinding noise) and sometimes makes a very loud and violent "gank!" noise, almost like the car is coughing.

Tonight I took the flywheel cover off and took a few shots. Some of the teeth are chipped, but all of the chipping is on the edge as if the starter bendix (I think that is the name of the piece that comes out and engages the flywheel) isn't coming out far enough.

Anyway, please check out the pics and tell me if you think I need a new starter, new flywheel or both. Would a specific Corvette starter (like the 88' and up starters) be a possible solution?

some of the pics are larger so I will post links to the pics.

General flywheel shot:
http://members.***.net/effergy/vette...flywheel01.jpg

A "top down" shot showing the depth of the chips:
http://members.***.net/effergy/vette...cal_chip01.jpg

and a shot showing the distance of the bendix to the flywheel in the retracted position:
http://members.***.net/effergy/vette...ics/bendix.jpg

Thanks!
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Old May 2, 2007 | 10:58 PM
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hm... I donno if the starter needs a matching tooth count for a flywheel... that's my first thought.

I also wonder if the shimming hasn't been quite right.
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Old May 2, 2007 | 10:58 PM
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What does the starter gear look like? I suspect the mesh is too tight.
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Old May 2, 2007 | 11:16 PM
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Originally Posted by CentralCoaster
What does the starter gear look like? I suspect the mesh is too tight.
Please pardon my ignorance, but are you asking for a better picture of the starter gear? And by "mesh" do you mean the contact between the starter gear and the flywheel or is there another "mesh" you are referring to?

Thanks!
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Old May 2, 2007 | 11:21 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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You should be able to fit a 1/2" mm wire between the starter gear tip and the root of the flywheel ring gear.

This is about the thickness of a paperclip.
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Old May 2, 2007 | 11:22 PM
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If thats a 153 tooth flexpate the starter needs to be moved to the innermost position. DOesnt matter how many teeth are on it for the starter to operate it.
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Old May 2, 2007 | 11:31 PM
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Originally Posted by cuisinartvette
If thats a 153 tooth flexpate the starter needs to be moved to the innermost position. DOesnt matter how many teeth are on it for the starter to operate it.

How do I adjust the starter? Does this have to do with shims between the starter and the plate that holds the 2 bolts that hold the starter assembly to the engine?

As or the number of teeth, as far as I know that is a stock late 1986 (aluminum head) flywheel. Does that help?

Thanks guys!
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Old May 2, 2007 | 11:33 PM
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Originally Posted by Square
How do I adjust the starter? Does this have to do with shims between the starter and the plate that holds the 2 bolts that hold the starter assembly to the engine?

As or the number of teeth, as far as I know that is a stock late 1986 (aluminum head) flywheel. Does that help?

Thanks guys!
Than it's normal 153 tooth. Shims are installed between the starter and block. Shimming bolt closes to flywheel loosens the mesh, shimming bolt further from flywheel tightens mesh.

Don't worry about number of teeth on the flywheel. If you had that wrong, it wouldn't even start.
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Old May 2, 2007 | 11:43 PM
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Originally Posted by CentralCoaster
Than it's normal 153 tooth. Shims are installed between the starter and block. Shimming bolt closes to flywheel loosens the mesh, shimming bolt further from flywheel tightens mesh.

Don't worry about number of teeth on the flywheel. If you had that wrong, it wouldn't even start.
I think I am starting to understand what you are saying. You are talking about shiming under only one of the bolts to "tilt" the starter, correct?

If that is the case then yes, the folks I had shim the starter did shim one side, the side away from the block.

I wouldn't mind paying a professional to shim the starter, but all the shops I have asked so far have basically said "uh.. it's 2 bolts and you shim as needed." and have not offered as much of an explanation of the variables as you guys have in this post.

If there is something I can read to help me set it up right, I am all ears (eyes?). Unfortunately it is late and the thunder has started again (storm here) so I will sign off until tomorrow.

Thanks again!
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Old May 2, 2007 | 11:45 PM
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Googled starter shimming, this was the first hit, looks like a good read.

http://www.carcraft.com/howto/2988/index3.html
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