454 vortec 7.4 water in oil, trying to trace source
Google search came up with this site specific to 454 and this major problem.
We had MH ready to roll except for an oil change, on draining oil noticed color even while under MH, rusty and cloudy, cancelled trip.
Prior to this no indications, no smoke, no loss of coolant.
After discovery did see radiator overflow tank was down below min and had been slightly above max. Research came up with head gasket, intake manifold gasket failure and condensation.
Did the pressure test on cylinders and they all pressure test 160 with a couple up to 180 but all held steady, head gasket and too much water for condensation and the missing antifreeze.
From reading this forum, cooling radiator might be sharing with oil.
Too wet out right now to crawl around under MH to check the backside of radiator, to see if I have oil lines into it.
My question is: What tests can I do to isolate source and solve?
Physically getting to intake manifold gasket to see and replace requires a lot of effort, which I will do after I have exhausted all other possibilities.