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Where did you send it?Figured since I pulled it off again I'd post a few pictures of the gasket and how the pressure is being applied to the manifolds and gasket. After taking a pair of calipers to the manifold flanges I found that the Exhaust flange was anywhere from .5 to 1.1mm thicker than the intake manifold depending on the bolt location. Sent the intake off to be machined flat again, after placing it on a real flat surface I realized it definitely has some warp to it.
1- this shows relatively even pressure on the manifolds around where they meet.
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2- here the exhaust manifold is getting way more pressure than the intake
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3- This was another spot where the intake side is leaking and the exhaust is taking all the pressure.
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Does your normal driving pattern get the engine hot for a good period of time during the winter? If not, then it's possible that there is condensation forming inside the valve cover and not being fully evaporated when it's cold outside.Anyone heard of a seasonal head gasket leak? For the last 2 years I've had a sort of foam that collects inside the top of the valve cover and in the oil fill cap. Only happens in the colder months, once the temperature warms up it goes away entirely. The weird thing is that there has been zero evidence of water when I've changed the oil, either in the summer or winter. Thought it was a freak thing last year as it went away in the spring, but it came back again this winter.
Doesn't seem to be burning coolant either, no smoke(steam) and rarely have to top off the cooling system
Thoughts?