Another Valve Question

[bubbamobilin]

I'm replacing the head gaskets on the old E9 and upon inspection of the heads there is a lot of black sludge around the intake valves. Looks like it could be leaking oil from around the valve stems or unburnt diesel or a mixture of both. These heads have 500K since they were rebuilt. Is this just an E9 problem or do the 6's do this too? Should I just put new valve seals in, take them to a machine shop for another rebuild (big dollars) or just clean em up reinstall and keep going. I've had no trouble out of this engine and I sure don't want any.

[fjh]

I'm replacing the head gaskets on the old E9 and upon inspection of the heads there is a lot of black sludge around the intake valves. Looks like it could be leaking oil from around the valve stems or unburnt diesel or a mixture of both. These heads have 500K since they were rebuilt. Is this just an E9 problem or do the 6's do this too? Should I just put new valve seals in, take them to a machine shop for another rebuild (big dollars) or just clean em up reinstall and keep going. I've had no trouble out of this engine and I sure don't want any.

Its a hard call !If you don't want to spend the bucks then clean em up and move on! V8 heads had a tendency to drop valve seats WITH OUT WARNING it would happen like this, shut the engine down for the day , start the engine in the morning and it would be banging. The point is you need to scrutenize the valve seats when you have em apart wether your rebiulding or just patchin look at em close ! Either way the heads will serve ya best by looking at the seats,

[bubbamobilin]

Its a hard call !If you don't want to spend the bucks then clean em up and move on! V8 heads had a tendency to drop valve seats WITH OUT WARNING it would happen like this, shut the engine down for the day , start the engine in the morning and it would be banging. The point is you need to scrutenize the valve seats when you have em apart wether your rebiulding or just patchin look at em close ! Either way the heads will serve ya best by looking at the seats,

Thanks for the reply. I'm all to familliar with the valve seats falling out. We went through that problem with our first E9 back in the 80's. I think we're going to put some new valve seals in and keep on trucking.