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General Car Chat / Re: Proper Motor
« on: 23 September 2019, 10:37:42 »Certainly the misfire at cold start with coolant loss is indicitive of water getting in the cylinder/sSurely that would lead to excessive pressure in coolant system, seeing as cylinder pressure are way more than coolant pressure.
it's showing exactly the same symptoms mine did.
Whenever I solved the external leaks(cap, expansion tank and top hose) the leak got worse.
I was resigned to changing the head gaskets, and got the parts together. By the time I started the job, more steam than normal was visible in the exhaust gases as it warmed up. But it wasn't pressurising the cooling system as much as blown head gaskets I had seen previously.
Removing the O/S head revealed a rotten gasket that was the cause of the leak, and a nicely steam cleaned piston. The other side was in a similar state, but wasn't showing signs of leaking.
If it isn't leaking externally(which can take some time to prove) then it has to be internal.
This also matches, my nice clean spark plug, which is really shinny compared to the rest!