If the nuts ARE copper, they will (worst case) strip on the rusty steel studs. Once they are off/apart, use a pipe wrench to get the old studs out and install new ones. Unless, they are not TOO bad, then just chase the threads with a die. Apply never-sieze to the studs before securing with the new nuts (and new gasket!) It's been so long since I've looked at the 4-cylinder maybe they did use steel nuts at the head... |