Too bad you have it all apart. I know that you probably wouldn't have seen than with the plenum installed, but it would have been nice to put a vacuum/pressure gauge on the PCV hose to see what's going on.
The metal is bulged. I thought the same thing. In 15+ years I do not remember ever seeing that posted anywhere. If it was I missed it. Two LR techs tell me it must be clogged hoses on the valve covers most likely. Cleaning those up for reinstall after I get the heads done.
It was, both valve covers came apart for a good scrub. Both gaskets look fine, heads as well and no obvious failure. That leads me to wonder where the coolant was coming out. I have a new water pump and thermostat since I am in this deep, but wondering where else to look? It was definitely coming off the back of the engine and down the transmission.
I always thought that was from a head gasket clamping failure. Just going by memory I've seen it a couple times and both times had a clamping failure of a head gasket. Like a broken headbolt or threads pulled out of the block cause coolant was down in the hole.
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