Well crap! Noticed water in my exhaust a few minutes ago after replacing a burned out temperature sender and need some advice. Cruiser has been down for a few weeks while I amassed parts to fix the cooling system and has only been started a couple of times to check for coolant leaks as the parts were replaced. There was no leakage but the engine did seem to run slightly rougher than it used to during the short time it was running. Didn't notice any water the last couple times I started it though. This is a symptom of either a blown head gasket or cracked head, correct?
Back story - 87 2F in a 76 FJ40. Radiator seam near the fill neck failed on me the last time it was driven causing coolant to forcefully leak out onto the engine and overheat. I had drove it at freeway speeds for approximately 30 miles before this happened. Of course the engine ran great up until that point and I wasn't expecting issues. Engine temperature had been normal and I was surprised to see the steam. Limped it off the freeway to make it easier to be towed while putting on an epic steam show, went maybe 3/4 of a mile before shutting the engine off. After it cooled I found the hose to the overflow tank was completely plugged and was not allowing any coolant or pressure in or out of the cooling system. Towed it home and started ordering parts.
Since then I have replaced the radiator, overflow bottle and hose, thermostat and temperature sender.
I'm no master mechanic but have replaced a couple heads before, just not looking forward to this heavy beast. Guess I will pull the spark plugs and check for water in the cylinders next. Any other suggestions before disassembly? Would a compression test be of any use? Thanks for helping!
Edit - Pulled the plugs, probably 1000 miles on these.
Obvious coolant in #4 cylinder.
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