Bolt size for 82 CFI manifold
Thread Starter
Race Director
Joined: Jul 2000
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From: Out Where the Buses Don't Run, Eglin AFB/ Niceville FL
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Bolt size for 82 CFI manifold
Anyone know the bolt size for the 82 CFI manifold? I need the bolts that hold the upper section to the lower. I bought a complete CFI set up but the two manifold pieces were apart with no bolts. I don't want to take a bolt out of my 82 to check. Also, are the gaskets readily available from a parts chain? Thanks.
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
http://www.drivewire.com/vehicle/198...fold-bolt-set/.they have the size listed .most do not use the gaskets .they use one of the many kinds of gasket makers out of a tube .the permatex holds up better than the gaskets.
Last edited by terry82; Oct 21, 2011 at 11:18 PM.
Thread Starter
Race Director
Joined: Jul 2000
Posts: 16,510
Likes: 2,400
From: Out Where the Buses Don't Run, Eglin AFB/ Niceville FL
2025 C8 Z06/7/E-Ray of the Year Finalist - Unmodified
2022 Corvette of the Year Finalist -- Modified
2021 C6 of the Year Winner - Modified
2020 C7 of the Year Finalist -- Modified
2020 C6 of the Year Finalist - Modified
My thanks to both of you.
Burning Brakes
Joined: Mar 2010
Posts: 943
Likes: 15
From: Valdosta Georgia
Okay, my top plate bolts are missing as well on my spare, but I used the bolts that go thru the TBs on the outer edges to check thread size. I discovered something. There are two different thread sizes on the top plate bolts. Gonna do more research and let you know what I find out.
Burning Brakes
Joined: Mar 2010
Posts: 943
Likes: 15
From: Valdosta Georgia
Okay, the larger holes are for the mounting studs, I assume you have those still? If not, same thread pitch as regular intake manifold bolts. The other ones are 1/2" hex head, with the threaded part 7/8" long, look to be about the same pitch as the 9/16" intake manifold bolts.
I hope that makes sense, lol.
Okay, more info...
Okay, the sizes I listed above are the hex head sizes, not the actual threaded part. I found this link which talks at length about installing crossfire manifolds and top plates:
http://www.thecubestudio.com/Crossfi...oldInstall.htm
It also states the size of the smaller bolts used as 5/16 UNC, so that gives you a thread pitch area to start from. I do know, as stated earlier, that the hex heads on those smaller bolts are 1/2".
I hope that makes sense, lol.
Okay, more info...
Okay, the sizes I listed above are the hex head sizes, not the actual threaded part. I found this link which talks at length about installing crossfire manifolds and top plates:
http://www.thecubestudio.com/Crossfi...oldInstall.htm
It also states the size of the smaller bolts used as 5/16 UNC, so that gives you a thread pitch area to start from. I do know, as stated earlier, that the hex heads on those smaller bolts are 1/2".
Last edited by Drawmain; Oct 22, 2011 at 10:22 PM. Reason: added info
Thread Starter
Race Director
Joined: Jul 2000
Posts: 16,510
Likes: 2,400
From: Out Where the Buses Don't Run, Eglin AFB/ Niceville FL
2025 C8 Z06/7/E-Ray of the Year Finalist - Unmodified
2022 Corvette of the Year Finalist -- Modified
2021 C6 of the Year Winner - Modified
2020 C7 of the Year Finalist -- Modified
2020 C6 of the Year Finalist - Modified
Drawmain - I'll have to check and see if I have the mounting studs. This unit came with a big box of parts I bought so all I really know for sure is the two pieces have been separated and no bolts. The TBI's and everything else are still attached to the top half.
Burning Brakes
Joined: Mar 2010
Posts: 943
Likes: 15
From: Valdosta Georgia
The two outside bolts on the TB's pass thru the TB's and thread into the plenum to hold on the top as well, same thread pitch. I can take pics if you need them. I did find a couple of the top plate bolts, and have both TB bolts. I don't have the studs.
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