I'm OVERHEATING STILL!!!!

[GreenSub95]

I'm at my wits end.i have a 95 legacy wagon. 2.2l manual.I've changed the thermostat,radiator because of a crack and water pump.and it is still overheating.oh yeah a new rad cap too.it keeps blowing all the water out of it.

[SilentRacer]

......I have no idea but ill say head gaskets anyway

[deadlydave]

it could be air bubbles in the coolant.
it could be the water pump.
If this has been happening a lot, and the car's been driven a lot while the heat's been way up there, it might be headgaskets too.

[DonMarcoPolo]

Are you still having the overheating problem? I would certainly hope not, since it is now September, but if you are, I have unfortunate experience with the same problem. Turned out to be a clogged heater-core.

[98BG5GT]

Does the inside of your coolant overflow reservoir look dark and sludgy? Does your car overheat after driving for a period of time? I recommend having a block pressure test or hydrocarbon test performed on your coolant to rule out a BHG.

[DonMarcoPolo]

I recommend having a block pressure test or hydrocarbon test performed on your coolant to rule out a BHG.

What is a BHG? I'm still tryin to get used to all the acronyms.



~Mark

[98BG5GT]

Sorry about that,

BHG is a blown head gasket. In my experience the air bubbles that come out of the radiator fill cap could be caused by 1) insufficient burping or purging of air from the cooling system. Especially if you just replaced any cooling system part ie., water pump, thermostat, hoses or removing the radiator. You would need to fill the system with fresh coolant and run your engine with the cap off or bleeder screw open until the engine warms up . Once the thermostat opens it should circulation and allows any trapped air bubbles to escape the system. 2) If you have successfully purged your cooling system and still have air bubbles that flow out your radiator cap, it may be a blown head gasket. This results from head gasket leaking at the point closest to the exhaust ports and cylinder rings. Detonation from the power stroke results in high pressure within the block and head mating surface. Any warpage to the head gasket will leak combustion gases into the cooling ports of the head which cause pressurized "exhaust" gases to run into your cooling system. High pressure tends to go in the direction of the least resistance, in this case the open radiator cap. Hence the air bubbles. A good way to confirm this type of BHG is to have a shop perform a cylinder compression test or cooling system pressure test and a hydrocarbon test on your coolant. Coolant should not look clumpy or have sludgy residue. This would indicate probable BHG.

[DonMarcoPolo]

Sorry about that,

BHG is a blown head gasket.

Aah... I see, thanks.

[dplacencia]

It sounds like head gaskets to me too.

[Sarra]

Did you properly burp your coolant system? That entails starting the car when it's cold with the radiator fill cap off, then having someone hold the throttle open slightly so you maintain 2,000 rpm. Then, keep adding coolant until no more will go in.

[matz_25]

Or just jack your front end , so it gives the car a 15 or so degree angle. Thats normal procedure to refill a flushed block. That way you won't have any bubbles in the system. Or so i've been told.

[Huffer]

Burping on an angle works pretty well, sometimes you have to roll the car up and down the ramps a couple of times to help the airbubbles work to the top.

That reminds me, I have to do a coolant flush on both my cars. :(