Advice about HMG! I'm new here

mirage83 · 05-04-2009, 02:27 AM

My personal opinion? Unless you have some reason to actually suspect a bhg all I'd do for the moment is check the torque on the headbolts. Retorque as necessary, make sure your cooling system is operating properly, stuff like that.

If and when you get a bhg (they do happen) and want to go to a metal hg, your machinist will be the one to tell you what size gasket you need to go with as it depends to a large degree on how much shaving they have to do to the block and head. BTW, mhg's take far greater precision on the decking work than normal head gaskets, so the finish has to be just right or it won't last.

I like ARP headbolts and headstuds, they're really good quality parts. But I don't myself really recommend changing them out unless you're doing the headgasket as well. I do know people who have done it replacing one bolt, torquing it then going to the next one, but the results are mixed. Some had no trouble afterwards, some suffered bhg's very shortly thereafter. The bhg's might have been totally unrelated, but I wanted you to know the whole story.

In any event, for the time being I'd just enjoy the car. 92's are relatively rare, and one with that few miles on it are even more rare. Take proper care of it and you should be fine for a lot of miles to come.

Oh, btw, your english is fine. Much better in fact than that of some who call this country home.

05-04-2009, 02:27 AM	#2
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	My personal opinion? Unless you have some reason to actually suspect a bhg all I'd do for the moment is check the torque on the headbolts. Retorque as necessary, make sure your cooling system is operating properly, stuff like that. If and when you get a bhg (they do happen) and want to go to a metal hg, your machinist will be the one to tell you what size gasket you need to go with as it depends to a large degree on how much shaving they have to do to the block and head. BTW, mhg's take far greater precision on the decking work than normal head gaskets, so the finish has to be just right or it won't last. I like ARP headbolts and headstuds, they're really good quality parts. But I don't myself really recommend changing them out unless you're doing the headgasket as well. I do know people who have done it replacing one bolt, torquing it then going to the next one, but the results are mixed. Some had no trouble afterwards, some suffered bhg's very shortly thereafter. The bhg's might have been totally unrelated, but I wanted you to know the whole story. In any event, for the time being I'd just enjoy the car. 92's are relatively rare, and one with that few miles on it are even more rare. Take proper care of it and you should be fine for a lot of miles to come. Oh, btw, your english is fine. Much better in fact than that of some who call this country home. Last edited by mirage83; 05-04-2009 at 02:37 AM.