RX-7 Chris

iTrader: (19)

For the past month my car has been smoking on startup and I was having no luck figuring it out. I did figure out that it was burning coolant. I started to fear the worst. The thing was, I had no coolant in the oil and no bubbling of the coolant in the radiator. I was loosing some coolant though.

I borrowed a friend's coolant pressure tester a couple of weeks ago to see if I could figure out the problem. I fount a small leak at one of the hose clamps for the lower radiator hose. That turned out to be my cause of coolant loss. Once I figured that out, I wasn't loosing any coolant pressure. I was stumped.

Yesterday I was thinking maybe I should check other possibilities. The only other thing that has coolant in it is the subzero start assist. Last night I disconnected the start assist and started the car. The car smoked like crazy but I figured it could possibly just be residual coolant in the motor. I let the car run and got the air out of the coolant. I took it for a drive to finish burning off the coolant.

This morning I started the car and it didn't smoke at all. The car is fixed. All I can figure is the sensor was shorting out causing the pump to go on every time I started the car.

KansasCityREPU

iTrader: (9)

Unless your filling the cold start assist tank, I don't think that was the issue. Most people don't fill that tank.

Glad you go it fixed.

RX-7 Chris

iTrader: (19)

The tank was full and is now down to less than half a cup.

Jeff20B

iTrader: (13)

You should remove the subzero fluid bottle from your car. There was a TPS report about it. I mean a TSB.

LongDuck

Any more info on that TSB? I don't recall seeing it, and my Sub-Zero Start Assist tank has been off the car for over 20 years. Don't need it in the desert. I blocked the vacuum lead going to it just in case, though.

RX-7 Chris

iTrader: (19)

I'm going to leave the tank in place only because I want to keep with the original look. I have no plan to reconnect it though.