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Hooch cooling system pushing out water from cap
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<blockquote data-quote="DaveKamp" data-source="post: 214355" data-attributes="member: 5122"><p>Pull the plugs, take pictures of 'em, identified by the position... and give it a leakdown test, watch for bubbles at the radiator cap... that will help you narrow down the location of the problem.</p><p></p><p>I believe that the problem you're experiencing, IS a heat/pressure situation, but more than likely, it is combustion pressure leaking out into the cooling system, but not cooling leaking INTO the combustion chamber. Understanding this is of paramount importance, because the TYPICAL blown-gasket situation is visually revealed as a 'cleaned' spot where coolant is being pushed through. In your case, I don't believe it is. I suspect you're developing enough combustion pressure under load, that one tiny spot somewhere is JUST weak enough... like... just a little too light on gasket force, either due to bolt torque, or a yielding fastener, or a REALLY slight warp, so that your 250ish PSI chamber pressures are leaking by, but the 16ish psi of cooling system pressure will not come backwards.</p><p></p><p>Take good, clear pictures... they MIGHT show it... and they MIGHT not. The leakdown is your best first clue.</p></blockquote><p></p>
[QUOTE="DaveKamp, post: 214355, member: 5122"] Pull the plugs, take pictures of 'em, identified by the position... and give it a leakdown test, watch for bubbles at the radiator cap... that will help you narrow down the location of the problem. I believe that the problem you're experiencing, IS a heat/pressure situation, but more than likely, it is combustion pressure leaking out into the cooling system, but not cooling leaking INTO the combustion chamber. Understanding this is of paramount importance, because the TYPICAL blown-gasket situation is visually revealed as a 'cleaned' spot where coolant is being pushed through. In your case, I don't believe it is. I suspect you're developing enough combustion pressure under load, that one tiny spot somewhere is JUST weak enough... like... just a little too light on gasket force, either due to bolt torque, or a yielding fastener, or a REALLY slight warp, so that your 250ish PSI chamber pressures are leaking by, but the 16ish psi of cooling system pressure will not come backwards. Take good, clear pictures... they MIGHT show it... and they MIGHT not. The leakdown is your best first clue. [/QUOTE]
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Hooch cooling system pushing out water from cap
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