Hi there, just wondering if anyone might be able to advise. Quite often when I switch off the engine, I get a small amount of coolant escape from the overflow pipe.
I have renewed the rad cap for the same type that was on it, a Stant Lev R Vent 16LB. But has made no difference. I wanted to renew the thermostat as well, but the bolts are seized solid & im scared I’ll break them off with too much force.
I checked the coolant level was about 1-1”1/4 below the filler neck and suspecting air in system ran it without the cap for about 1/2 hour until warmed up. I checked the temp with a thermometer & she was exactly right at all times, and dropped quickly as expected if I revved the engine lightly as the fan cooled it.
However, as soon as I shut the engine down, after a few seconds the coolant level rose up & chucked some out of the open filler neck.
Car runs very well & doesn’t seem to overheat, no coolant loss when driving/running & no water or visible fumes from the exhaust at all.
Pops a bit on the overrun when backing off the throttle from higher speeds but this might be due to the non-OEM open cherry bombs & Lake Side pipes. Engine itself very quiet. Full compression on all cylinders.
Any advice as always, would be gratefully received. Thanks.
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