liljeterjr

Names Benny, i got a 98 civic with a stock y8. replaced the thermostat recently and now having issues of bubling from the resevior. comp test was 140 across and 135 on one cylinder. oil is not milky, no leaks anywhere, not coming out of the exhaust just from the resevior. did bleed the system once i hooked everything back up from the thermostat replacement. doesnt overheat. thoughts.....

PicovAndropov

Sounds like the water pump is working...

sixcyl?

Could just be air evaporating out of the cooling system. If there isn't an overheating problem, I wouldn't worry about it. In the mean time just keep an eye on your temp gauge and fluid levels.

Fabrik8

You've taken the radiator cap off to work on the coolant system, and I'm guessing that the cap isn't sealing properly anymore. Get a new radiator cap and see if that solves anything. Even if it doesn't, you're only out a few bucks and it was probably due for replacement anyway.

John M

I had that problem on my old ctr swap. Turned out to be a headgasket.. Replaced it and problem was solved.

liljeterjr

well im on my way to the head gasket, but what can a radiator cap do to hinder it anymore than it already is. thanks for the input ill keep you guys posted, keep throwing ideas tho as well

kadafiz

Pull your dipstick and see if coolant and oil are mixing.. if they are ur headgasket is done

liljeterjr

it hasnt, looking at replacing the radiator cap today, some how checking the waterpump too