RX7Club.com - Mazda RX7 Forum - Coolant wont flow back out of overflow bottle

RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)

- 2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)

- - Coolant wont flow back out of overflow bottle (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/coolant-wont-flow-back-out-overflow-bottle-775881/)

Quote:

Originally Posted by carnive (Post 10798370)

I'm having the a similar issue (1987 non-turbo). I just replaced the water pump and thermostat, and have driven it about 500 miles since (Two fill-ups).

Yesterday, the Add Coolant light comes on just as I get home.

This morning, the reservoir is completely full. What's weird, though, is that my upper radiator hose was still collapsed flat. (Returned to normal after opening the cap) If there was a leak somewhere, shouldn't have returned to normal overnight?

your radiator cap is faulty or the line going into the reservoir from the radiator is semi clogged with crap.

at least that is your problem, almost everyone else in this thread has a bad motor.

Quote:

Originally Posted by Karack (Post 10798413)

your radiator cap is faulty or the line going into the reservoir from the radiator is semi clogged with crap.

at least that is your problem, almost everyone else in this thread has a bad motor.

Ah, ok, thanks. Yeah, I put in some stop leak metal sealer when it started leaking (which turned out not to be a leak, but water pump failure). Guess there's some residual crap in there that I need to flush out.