Need some help with a bolt

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Oct 16, 2004 | 08:08 PM

azvolfan

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From: Avondale, AZ

Car: currently thirdgenless!!!

Need some help with a bolt

It's on the backside of the passenger side head. I think it is where the A.I.R check valve is secured as it heads down to the cat.

Anyone know what size bolt/thread that is?

Oct 16, 2004 | 09:41 PM

8Mike9

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From: Oakdale, Ca

Car: 89 IrocZ

Engine: L98-ish

Transmission: 700R4

I'd take a WAG and guess it'd be the same as the one's on the front of the heads, 3/8th x18? (NC) thread...same as accessory holes are.

Oct 16, 2004 | 11:44 PM

azvolfan

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From: Avondale, AZ

Car: currently thirdgenless!!!

I'll take that as a good educated guess. Thanks.

Oct 17, 2004 | 12:27 AM

jmd

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From: Aridzona

Car: `86 SS / `87 SS

Engine: L69 w/ TPI on top / 305 4bbl

Transmission: `95 T56 \ `88 200-4R

holes drilled & tapped into the ends of the heads are 3/8-16.

Oct 17, 2004 | 01:47 AM

azvolfan

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From: Avondale, AZ

Car: currently thirdgenless!!!

OK. I'll give 3/8's a try and see how that does.

Oct 17, 2004 | 01:51 AM

ljnowell

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Wait a second are you asking about the bolt head? cause I doubt that a 3/8 is gonna fit it. On most older cars they are 1/2 or 9/16. On newer ones I have found 13, 14, 15 mm. usually 14, 15, it seems anyway.