Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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when pressure tested with a pressure tester pressurizing the coolant system will it hold at 15 PSI for over 1/2 hour ? or a slow drop ?
didn't even pressure test . drained the oil pan ,left plug out and even with engine at room temperature and coolant de gas bottle cap left off , I get a drip of antifreeze out of oil pan drain plug about every 10 minutes.
ok with loosing that kind of coolant your best bet to find how its getting into the engine is as follows
pressure test the coolant system and see if when you pump it up to 15 psi you see it drop slow
if so pull the valve covers and look at the cylinder head center of it near the valve springs there are big round service plugs see if you can see the leak if so and its the plugs pull them out and reseal them
if you see it leaking but its NOT from those plugs the head may have a small crack in it and would need to be replaced
if you see nothing then remove the intake manifold and since this is a dry intake manifold look at the valley of the block under the intake and where the heads meet the block for any signs of the leak visually if you see it then either replace the head gasket or what ever is cracked
if you still see nothing the heads have to come off and be sent to the machine shop to be checked for cracks and flatness
if that doesn't show anything there is something wrong with the engine block
there is no compression getting into the de gas bottle like a normal head or headgasket problem !!! no compression getting into the coolant system . can a headgasket on this type chevy engine go bad and just put coolant into oil pan without pressurizing the coolant system??? There is no bubbling inb the degass bottle running engine at operating temps!!
yes it can without pressure as long as the leak area is below the coolant line the coolant can still leak
correct a bad head gasket does not always have to involve compression
the head gasket also seals coolant passages between the cylinders and the outer edge of them
so on this type of engine the coolant can get to an unpressured oil port and then into the oil because of a bad headgasket?? all the spark plugs are dry and it is not burning the coolant either..
it will be leaking under the valve cover , where the head gasket meets the block under the intake manifold or an issue with the block
those are the only spots it can get into the oil pan and actually be dripping out the drain plug