coolant from exhaust manifold bolt

[brandonwolf3]

92 sunbird 2.0. Leaking coolant from last cylinder exhaust manifold bolt. the bolt has been sheared/broken off at block. some say head gasket, some say that particular bolt goes into water jacket and rusts thats why they break off. any thoughts?

 

[melsg5]

the head gasket would be below the exhaust manifold. It is a possibity that the exhaust manifold bolt threads into the cooling jacket but for a definite answer check with a local machine shop that has worked on these type of heads.

 

[92 Sunbird LE]

Possibly a cracked head, all these use exhaust studs not bolts.....

It may be impossible to easy out the old stud ( steel in aluminum = welded)

Might try to have it drilled out on the car , thread repair insert added and sealer added to new stud first before a head replacement try.( cheaper way out)

Pic below.............showing exhaust studs

Doug in Az

 

[92 Sunbird LE]

Head cross section pic..........................


Doug in Az

______________________________

 

[brandonwolf3]

They are studs. I think today I'm gonna check and make sure theres no water in the cylinder. I hope not. I have called a couple places about drilling and tapping, and so far seems no one wants to mess with it. I guess if theres water in the cylinder it would be a waste of time any way. Thanks for the input