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Old April 12th, 2014, 05:52 AM
Vern Vern is offline
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Join Date: Aug 2013
Location: North Idaho
Truck: 1966 GMC 1/2 Ton
Age: 54
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Default Re: Blown head gasket vs. cracked block

The more I drive it, I'm not as convinced that it's burning much coolant afterall. But I have to top off the oil 2-3 times between fill ups. The white bumper next the tailpipe is now black. There does appear to be some oil leaking from the valve cover, but not enough to explain the extent of the oil loss. I don't see oil underneath, but it is parked on gravel. The compression test put the cylinders in the 120 +/- 10 PSI range for all 6 cylinders. So, my hope is that the problem is in the head. There is a real chance that dropping a couple hundred bucks to get the head rebuilt is a gamble.
I've seen a number of 305's around, but they all look like they might need to have lots of work done (new rings, head) to them like this one does. I hope to get after it this weekend... fingers crossed!
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