Evo owners need your help,advice. I have a problem with my Evo, every time I drive my car hard the coolant overflowtank fills up completly.Now my car doesn't overheat, the temp. gauge reads normal. Coolant is filled to the correct amount. Whats wrong with my car? do I need to retorque my headstuds (they are stock) HELP!!!

 

Your head gasket is likely blown.

 

there is no oil leaking or coolant.

 

There doesn't have to be.

 

how can you tell if it's blown (is there a way with out taking off the head)

 

check for the thermostat!

 

if you overfill the tank its normal for the water to drain out!its not a lown head gasket if it was the car would go into the red zone!

 

what do you mean by red zone.

 

The temp. gauge would go into the red zone.

 

Do you see bubbles in the overflow tank when the car is running? If so, thats not a good sign. Also you can do a compression test to check your HG. Its really easy on our cars.

 

oohh...yeah my gauge stays in the middle. It happened when after I took my car to get an oil change at the dealer then the next day took it out the track and on the 4th run my car just started shooting coolant from the overflow tank. since then Ive noticed it fills up completly after I dvive the car hard.The coolant isn't overfilled.

 

I see bubbles after Ive driven her hard. not while idling.

 

If is stops doing it soon, it might be just because the dealer topped the coolant off when doing the oil change.

 

Is the coolant actually bubbling while you watch it? Usually that means compression is leaking into the cooling system through the headgasket.

 

yeah coolant actually bubbling while I watch it. Guess I have to get new gasket and some ARP headstuds.