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1972 Buick GS455 Hardtop Coupe Base

1972 Buick GS455 Hardtop Coupe
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July 16, 2009, 2:57 pm

Daryl O

Question: Need guidance regarding broken exhaust manifold gasket removal and replacement

My all original 1970 GS455 engine has never been opened up, therefore the bolts to the exhaust manifolds will be extremely frozen to the heads. Could somebody please provide guidance on what I must do to get them off, as well as torque patterns, how to remove the accessories covering the passenger side of the engine, and if an air compressor and air ratchet will be the only way to complete a job such as this. Thank you, I appreciate your help and guidance. Daryl

July 17, 2009, 9:53 am

Tyler O

PB Blaster is probably your best bet. Let it soak for a long time (12 hours or more).

Loosen the bolts evenly and remove slowly. Apply anti seize where ever you can on the threads.

New bolts/nuts/studs would be a good idea.

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