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Old 11-29-2008, 12:00 PM
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302 ford, blown head gasket?

i just want a couple more opnions. i have a 302 in a 85 f150, number 1 & 2 cylinders (right bank, fist & second cylinders) only have 20-25 psi on the compression tester, a couple others had 150 psi. head gasket blown between the two cylinders leaking from one to the other?

i haven't even taken the valve cover off yet. is there any need? what would cause this?


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Old 11-29-2008, 01:21 PM
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I would think your guess is correct, as I have seen some Ford engines do this with low miles from the factory in the 80`s vehicles. Once you remove the head you`ll have to check the blocks squareness, if it`s over .002 it`ll have to be resurfaced.
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Old 11-29-2008, 01:54 PM
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This wiki article may be helpful to you: Head gasket. It's compiled from 16 forum discussions and 8 articles on head gaskets.

The wiki article confirms your guess and DoubleVision's response, in the "Symptoms of a blown head gasket" section. Two adjacent cylinders with low but equal pressure indicates head gasket failure between the two cylinders.

If anyone has anything to add to the wiki article -- go for it. It's going strong, but could always use more info.

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