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Old 12-11-2014, 05:13 PM
Z69GP Z69GP is offline
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Join Date: Sep 2010
Posts: 27
Default Uh Oh...Exhaust Manifold Bolts!!

The job of converting from stock to Long Branch manifolds on my '69 Grand Prix has begun. I have 8 bolts to deal with, and they are 9/16". I removed 3 of the 8 bolts no problem, but the others seems smaller than 9/16"....but not as small as 1/2". These bolts are all original and seem to have suffered degradation over the years. I have tried to fit a 13mm wrench on the bolts but cannot loosen them. I am also trying to avoid stripping the heads.

Any suggestions?? I am hoping to complete this task w/o having to pull the engine.

__________________
Mark

Currently own a 1969 Grand Prix Model J
Have owned; 1963 Grand Prix, 1967 Catalina sedan, 1968 GTO convertible, 1969 GP Model J, 1972 GP Model J, 1977 GP LJ, 1979 GP.
 


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