i just got my pos sentra basck together after it overheated this last summer.
replaced the head gasket without shaving the head.
now you can see it bubbling up thru the radiator......not good huh?
blow-by thru the exhaust ports?
it runs but it doesnt overheat, but i suspect it will eventually.
would anything else cause this? prolly not i'm guessing...
crack in the head bewteen a coolant passage and the comb chamber.
run it long enough and it will pump the water out of it.
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crack in the head bewteen a coolant passage and the comb chamber.
run it long enough and it will pump the water out of it.
x2 I bet the bubbles get faster when you rev the engine.
The head should have been pressure tested.
You may have pressure in the coolant system long after you shut the engine down.
I had a cracked head in a 4cyl once and when you come out in the morning to check the coolant level the radiator hoses would still be rock hard
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