wwolf771177

Ok so I heard bubbling in my overflow tank. The only time it did that was when my radiator cap went out. I replaced the cap and it didnt bubble anymore. Friday after I got home from work I heard the bubbling again. I checked the radiator and it was low. So I filled it up bled it and in theblast 2 days no bubbling. Tomorrow ill give it a real drive since I have to drive to work and ill see if it will do it again. I searched and people say it could be the head gasket going. Before I take the head apart and rebuild it. Elae could make the overflow tank bubble up.

holmesnmanny

Compression test to verify if the head is damaged or not

forward

That's almost a universal sign the header gasket is blown/leaking, allowing combustion gasses into the cooling passages.

Is there any sign of oil mixed in with the coolant?

wwolf771177

No sign of mixed oil and coolant.

Lost Again

Air in the cooling system will give you what you are describing.

Find the leak, fix it. Then be sure to properly remove the air from the system.