LT1 Flywheel Bolts Source

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Sep 6, 2009 | 08:52 PM

Bull

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From: Amherst, MA

LT1 Flywheel Bolts Source

I searched this topic, but the most recent post referencing the issue was a bit dated.

Does anyone aftermarket make flywheel bolts for the LT1 engines, or am I limited to buying through GM?

Also, aside from my local dealer or maybe gmpartsdirect.com (which I have heard is sloooooooww to ship) is there an online source?

I need some this week. The guy I bought my swap parts from gave me five correct bolts, some with chewed heads, and one bolt that is too short because it's for a flexplate and not a flywheel.

Sep 7, 2009 | 09:24 AM

85MikeTPI

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From: Newark, DE

What I've done in the past, is purchase two ARP torque conv bolt kits (230-7303) that have a smaller head that clears the 1pc RMS, and still has the correct threads and UHL.

YMMV

Sep 7, 2009 | 10:15 AM

Bull

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Thanks for the reply and idea, Mike.

How do the heads on the torque converter bolts compare in size to the factory flywheel bolts? I wouldn't want to go too small, if GM intended for them to be a certain size to spread clamping force.

Sep 7, 2009 | 10:30 AM

85MikeTPI

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Smaller in relation to the ARP flywheel/flexplate bolts that only fit
the older 2pc RMS GenI cranks.. They are similar to the stock sized
bolt head. This pic below (for a flexplate, so ignore the part#s) shows
the three bolts. The top is the ARP TQ-conv bolt, to the left is the stock
bolt, then below is the large ARP flywheel bolt for a 2pRMS. (No way
to fit a socket on them when installed)

HTH
mike

Sep 7, 2009 | 12:51 PM

Bull

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Awesome pic, makes it all clear to me. I am going to check Summit for 230-7303 and put in an order. Thanks a lot for the help.

Sep 7, 2009 | 02:17 PM

85MikeTPI

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Quote:

Originally Posted by Bull

Awesome pic, makes it all clear to me. I am going to check Summit for 230-7303 and put in an order. Thanks a lot for the help.

Kewl.. Just remember they come in sets of 3 bolts for the TQ conv, so you need 2 sets.. More expensive, and you end up with nuts that you don't need.. Shame ARP doesn't just package a set for the application.

Sep 7, 2009 | 05:55 PM

Bull

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From: Amherst, MA

Ordered! So painless...much better than having to call Parts Dept. of dealer, then drive there after work before they close.

Those bolts are listed as being 7/16-20, and I know when I measure the ones I have they were metric...must be an equivalent size.

Are they the same exact length, Mike?

BTW, what is "UHL?"

Last edited by Bull; Sep 7, 2009 at 06:02 PM.