Exhaust manifold bolts
Thread Starter
Cruising
Joined: Mar 2005
Posts: 11
Likes: 0
From: Northern Virginia
Exhaust manifold bolts
I'm in the process of removing my exhaust manifolds to install headers and I've gotten 11 of the 12 bolts loose. However, on the drivers side one of the two center bolts is actually a threaded bolt coming out of the manifold with a nut on the end. Does anyone know why this would be? Of course this is the one giving me a problem and I've tried almost everything to get it off. I'll try to post a pic tommorrow.
77 L-48
77 L-48
Race Director
Joined: Apr 1999
Posts: 10,866
Likes: 717
From: Beverly Hills/Pine Ridge Florida
Some Corvettes have a combo stud/nut there to mount the heat riser tube for the choke.
After you've removed the nut, look again and see if there isn't a hex head down there for you to get a wrench on. Chuck
After you've removed the nut, look again and see if there isn't a hex head down there for you to get a wrench on. Chuck
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,500
From: Little Rock AR
There is a stud-bolt like the one in Paul's picture for the front passenger side bolt that is also used for the A/C compressor bracket.
You might be able to back it out with a deep well socket. That area is pretty hard to get to on the C3 so I understand that it is not real simple.
-Mark.
You might be able to back it out with a deep well socket. That area is pretty hard to get to on the C3 so I understand that it is not real simple.
-Mark.
Race Director
Joined: Oct 2002
Posts: 12,065
Likes: 2
From: Smalltownville Michigan
Cruise-In 5, 6 & 10 Veteran
St. Jude Donor '09
I hope you have better luck than I did.. I had a center one on the passenger side seize in the manifold... was a royal PITAS to get out
Thread Starter
Cruising
Joined: Mar 2005
Posts: 11
Likes: 0
From: Northern Virginia
Thanks for the info I just wasn't sure what was supposed to go there and the previous owner removed the choke heat stove so I was at a loss. The nut on the a/c bracket came off easily and I plan on removing the a/c components since it doesn't work anyway.
Bob, I'm doing what you suggested and using a torque wrench and taking my time. They all seem to be coming out but something's bound to pop up or probably break off.
Bob, I'm doing what you suggested and using a torque wrench and taking my time. They all seem to be coming out but something's bound to pop up or probably break off.
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Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Watch when you put it all back if you dont re-install the heat riser. The bolts are a little too long without it and will bottom out in the block without completely sealing the exh manifold against the block. Drove me nuts till a forum member pointed that out.
