Quote:
Originally Posted by robthewrench
The PSI on cylinder 6 should be much higher. over 100. I would check the compression again, just to confirm. You could also pull the valve cover to see if there is any obvious damage to the valves on cylinder 6.
However, at 150k miles, a head rework is not really a good investment. Sorry to say that while it is possible to fix valve damage, it is not financially a good move. Removing, rebuilding, and re-installing a head is not a DIY level type job.
If the damage is in the cylinder wall, the engine is done for.
Sorry to give you bad news, I hope that this can help.
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this.
a decent condition used head is still 5-600 dollars.
you'd be into it for near a grand just to swap a used head on it yourself, after you replace all the stuff you should replace because you're there.
If the cylinder wall or piston is damaged, it's over.
Would second a USB borescope through the plug hole to look for damage.
Maybe you get lucky and it's just a stuck valve from a plastic bit in the seat.