Re: [Chevelle-list] Exhaust Manifold Bolt Removal

Sun, 12 Feb 2006 19:14:14 -0800

Well, I finally got the sucker off.  I tried the bolt-outs, but there was not enough clearance at the manifold to make them useful.  A 14mm socket is just a tad smaller than a 9/16" bolt, so I hammered the 14mm in place.  I heated the bolt so that it was cherry red.  I cooled it with PB Blaster.  After about 3 heating and cooling cycles, it finally came loose.

Thanks for the help.

Rob S.

On 2/8/06, Al Hembd <[EMAIL PROTECTED]> wrote:
I have also used this trick very successful it also works great if you brake the bolt and have enough sticking out to put a nut big enough over the shaft and weld it on then remove it.
----- Original Message -----
From: Trooper
Sent: Wednesday, February 08, 2006 10:20 AM
Subject: Re: [Chevelle-list] Exhaust Manifold Bolt Removal

I agree with Mike, if you have a welder this is a great way to do it. Not only do you have a nice new bigger nut to grab, the heat from welding helps loosen the bold.
 
Trooper
----- Original Message -----
Sent: Tuesday, February 07, 2006 3:15 PM
Subject: Re: [Chevelle-list] Exhaust Manifold Bolt Removal

An old timer taught me that trick many years ago. It rarely fails.
Mike
----- Original Message -----
From: Larry Shouse
Sent: Tuesday, February 07, 2006 1:51 PM
Subject: Re: [Chevelle-list] Exhaust Manifold Bolt Removal

Great idea Mike!
 
Larry
----- Original Message -----
Sent: Tuesday, February 07, 2006 1:47 PM
Subject: Re: [Chevelle-list] Exhaust Manifold Bolt Removal

Rob, A trick I use for tough rounded bolts is I set a larger nut on top of the bolt and weld it to it. The larger the better as long as you have clearance. I would use a 1/2" nut on the 3/8" exhaust bolts. Then carefully impact it out while it is still hot from the weld.
Mike Holleman
----- Original Message -----
From: Rob Shaffer
Sent: Tuesday, February 07, 2006 1:15 PM
Subject: [Chevelle-list] Exhaust Manifold Bolt Removal

I have a question for the list that is not specifically Chevelle related, but is chevy related nonetheless.  I'm removing the exhaust manifolds from a 1995 Chevy 454 engine to install headers.  The passenger side manifold bolts came out with the help of an impact wrench.  On the driver side, I've got all but three bolts loose.  I stopped when one of the tough bolts started to round out.  Now I need to remove the bolt, but cannot get a grip with a socket.  I think Craftsman makes something that will grip even a rounded bolt head, so I'll give that a try, but thought I'd ask whether anyone has any advice on removing these last three bolts.  Any tips to remove the bolt that has started to round?  How about just removing the stubborn bolts?  Should I heat them first?  Any tips that have worked for you in the past will be appreiated.  Thanks.

Rob S.
1966 Chevelle
SS 396 Convertible

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