350 Chevy starter pinion to flywheel clearance - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-26-2006, 09:17 PM
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350 Chevy starter pinion to flywheel clearance

Hello, I have a 1970 Chevy 350 in my Jeep, with a 168 tooth flex plate, and a stock starter with a 9 tooth pinion. My problem is that even with no shims, the pinion gear teeth barely touch the flywheel teeth. The drive is extending fully, and the gears line up fine. The bushing in the starter is new. I need to somehow move the starter towards the flywheel, or is there a different pinion gear that is bigger? I have tried four different starters, and they are all the same. I suppose I could mill down the mounting pads on the starter nose, but there has to be a better way. Thanks.
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Old 09-27-2006, 02:21 AM
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Doc here,

Do you still have the first starter?

Doc
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Old 09-27-2006, 09:42 AM
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No, unfortunately I turned it in as a core before I knew I had a problem. I've been reading some previous questions and answers, and it looks like angle milling or shimming might work.
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Old 09-27-2006, 06:02 PM
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Doc here,

Well , Two options DO exist..

The first is a Genuine GM starter from the Steal...uhhhh..Dealer..Or a reputable "Mom and Pop"...either way...$$$.$$

OR a High torque Mini starter..They have a better chance of retrofit than a reman or aftermarket..and cheap enough..'bout $109.00 fazools IIRC.

Doc
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Old 09-30-2006, 01:09 PM
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Fixed!!!

This morning I took a soft-disc grinder and removed some material on the inboard side of the starter mounting pad, then trued it up with a flat file, essentially angle milling the starter nose to move the pinion closer to the flywheel. Got it right on the first try, the clearance is correct, and the horrible grinding is gone!
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Old 09-30-2006, 04:56 PM
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Doc here,

KEWL...Glad to hear it did work!

The very next thing I might do is Find out why things aren't fitting as advertised..maybe a Ring gear wearing..

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Old 09-30-2006, 09:49 PM
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Most likely.....

I'd be willing to bet the reason the starter is not fitting right is that the nose cone casting is improperly machined, in the mounting pad area.

This seems to be a fairly common problem with a lot of aftermarket starters.


Doc
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Old 03-22-2009, 06:33 PM
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Same problem

I just had this same problem in a 76 C10 with a 350/350... turns out the motor was a car block 350 and I was using truck starters... Also the motor had a cam and a higher compression so required a High torque starter... took me a week to figure all this out...

Matt
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Old 03-28-2009, 03:49 PM
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no such thing as car vs truck, they are all the same.

usually the problem is the wrong nose cone for the wrong size flywheel or plate

168 tooth is for staggered bolt starter nose

153 tooth for straight across nose

no shims ever on sbc engines
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