coolant loss and oil level rising

wigs2469 · 06-27-2009, 09:45 PM

Have a 2001 chevy silverado z71 5.3 have coolant loss and oil level rising,no signs of coolant in oil as been told should look milshaky looking and it does not.Was told could possibly be intake manifold gasket which just replaced again but after more investigation have been told manifold is dry with no coolant except through throttle body.did compression test and was fine with no significant loss between cylinders,did coolant pressure test after intake gasket was replaced,no drop in pressure after 20 minutes at 15 psi.Just doesnt to make any sense,Wondering after using motor flush at last oil change it plugged up oil filter and raised oil level and coolant is just burning off.any comments ?

j cAT · 06-28-2009, 03:40 AM

Quote:

Originally Posted by wigs2469

Have a 2001 chevy silverado z71 5.3 have coolant loss and oil level rising,no signs of coolant in oil as been told should look milshaky looking and it does not.Was told could possibly be intake manifold gasket which just replaced again but after more investigation have been told manifold is dry with no coolant except through throttle body.did compression test and was fine with no significant loss between cylinders,did coolant pressure test after intake gasket was replaced,no drop in pressure after 20 minutes at 15 psi.Just doesnt to make any sense,Wondering after using motor flush at last oil change it plugged up oil filter and raised oil level and coolant is just burning off.any comments ?

these engines had some heads made by a company for GM that were defective...they crack and this is somewhere here in the forum..do a search I believe it gives details on IDing the heads and where they are cracked..

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