Need Help?

1972 Buick GS455 Hardtop Coupe Base

1972 Buick GS455 Hardtop Coupe
Do you own this car?
Estimated Mileage
 Miles
Enter current mileage for most
accurate info about this vehicle


Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.

back to question list

Ask the Community

Ask Our Auto Mechanics


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
Expert Mechanic

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.


0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to



My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…