accessory bolt size
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 17
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From: Tyler and Houston Texas
Car: '92 RS
Engine: Vortec 350 engine code L-31R
Transmission: 700-R4
Axle/Gears: stock rear (for now)
accessory bolt size
Just wondering if anyone knows the thread size for the torx head bolts that hold the accessory brackets on. It's not a 3/8ths-16 although it's close to that. I'm presuming its a metric size. I can find all sorts of data on head bolts, valve cover bolts, motor mount bolts, etc. but nothing about accessory bracket bolts...
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: accessory bolt size
Try the second link (the pdf) in the following link for information that may prove useful:
https://www.thirdgen.org/forums/afte...rsion-kit.html
JamesC
https://www.thirdgen.org/forums/afte...rsion-kit.html
JamesC
Supreme Member
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
Re: accessory bolt size
I don't think they're metric. The threads they're screwing into are still plain old small block Chevy castings (block/heads) which were never tapped for metric-sized accessory bolts in any year to my knowlege.
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