OK.. so when i drive my car for a while or take it to 8k rpm i here a weird noise sometimes and it sounds like water (or a coffee machine)

so i look on my floor bored by my gas pedal and their is coolant everywhere.

it only happens sometimes.

car is 89 GTU 5speed


help?

 

u need a a new heater core most likely, leaks under high pressure and you might need a new rad cap (cheap) and thermostat from mazdatrix, and a good flushing
pretty much a coolant system servicing with a heater core installed, i just happen to have a heater core i willing to part with for cheap

 

dead on

 

what he said....

 

If your lucky.. It also might be your coolent flow valve just above the heater as well.

If you haven't replaced the firewall heater pipes since the stock tubing, you might want to consider that into your budget. They are about 120 bucks tops from mazda.

Also if you are using screw down clamps on the firewall heater tubing, make sure not to screw down to tightly, the tubing is soft brass/copper. Too much tightning of the clamps will bend the tube causing a poor seal at the firewall and high reving will spray coolant into your firewall and will eventually find it's way to soak in to your carpet.

 

yeah thought it was the heater core because thats what iv herd before.. but i have also herd of people blowing the coolant seal?

so i was just makeing sure my guess was in the ball park

thanks guys!!

 

Check those heater hose / firewall connections first as logicfoxx suggested. I have seen those bent / out of round copper pipes cause the problem on several cars.

 

out of round core tubes can be restraightened with a socket that fit the ID of the tubing, it could be the valve but thats a simple easy quick check but im guessing not