All-

I have a 87' GL that has a recurrent problem with the pass. side head gasket. Problem is, it won't stay intact. I just replaced it for the fourth time, and got approximately 5 miles out of it. This is the "short" record. The previous gasket went 5k miles. The one before that was good for 500. I don't remeber how far the first went. 

The gaskets are splitting from what would appear to be the back, or water jacket side. They happen on the same corner each time: lower rear. There is some pitting on the water jacket in this area, but it not the only area with pits. I tried putting a little sealant to fill the pits... maybe that wasn't such a good idea.

Anyway, any advice or comments would be appreciated. I'm about ready to push the thing into the Susquehanna.

Mark