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I was wrong, the pressure builds up in the cooling system even when the heater core is by-passed, I can't even drive 7 miles without it happening. I'm afraid you guys might be right about the head gasket. But what I don't understand is that the truck runs perfect. The headgasket was replaced only about 5000mi ago. Can they fail that fast?


I have had them fail soon after replacement. One time was due to the shop (a Toyota dealer in fact) not properly tightening the head bolts and using a rebuilt head that was slightly warped. I had that head replaced with a new factory head along with some ARP head studs and that head and gasket has been running fine for 10+ years now.

r.c.brown@ieee.org
TruckEditor@tlca.org
Project: 4Crawler
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