Spirit Rx-7

iTrader: (15)

So i got this problem with the cooling system, where theres too much pressure. Did a pressure test, losses pressure slowly, no leaks. but does burn a lil smoke.

I know a coolant seal is bad, but shouldn't it still be sucking coolant from the reservoir tank? my radiator looses coolant, but my reservoir tank stays overflowing from the pressure. I changed the hoses to the tank, and its still not sucking coolant back in.

I'm already going to get it rebuild, im just afraid the problem is still going to be the same, where its not sucking coolant back in. whats can cause this?

turboIIrotary

iTrader: (9)

if your coolant seal is blown pressure is being pushed into your system resulting your resevoir tank overflowing.

R_PROWESS

iTrader: (3)

Yep combustion exhaust is forcing its way into the coolant system through a crack in the coolant seal groove.

Spirit Rx-7

iTrader: (15)

shouldn't there still be vacuum to suck it back in when it cools down?

NoDOHC

The vacuum simply pulls air in from the engine (as the coolant seals have failed).

I have seen this before. You have a bad coolant seal (similar to head gasket in piston engine), you will need to rebuild your engine soon.

RETed

No.
It might on a very tiny leak, but most likely it will not.
Think about it...
Is it easier to suck the coolant back in or suck air?

You really should not be messing with it since you already mentioned it has a bad coolant seal.
You need to treat the car as a dead engine.
I do not recommend driving the car around like that.
You're just making it worst by possibly damaging the internals more.
The chances of being able to rebuild and salvage most of the internal engines parts goes down the more you drive it like that...


-Ted

13Brandon

i have a bad coolant seal and the same thing happens.. ive been driving it just because i need to get to work

Gene

iTrader: (1)

It can also fail to suck the liquid back from the overflow tank if the hoses on the tank are hooked up wrong. Examine the lid carefully to make sure you have them the right way, the one from the motor should go to the hose that runs to the bottom of the tank. Unhook the hoses and blow air though to make sure which is which. It's very easy to screw them up, I can't even remember offhand what's the right way.

But yeah, what ted said, don't drive it with the leak. You can lose all your coolant and turn what might be a cheap fix into a very pricey one.