Coolant leak only if heater is turned on?

Question

I have an 87 ford escort. My timing belt snapped last week, my friend who is a mechanic replaced it. Right after replacing it, i was having massive water leaks coming from right next to the timing belt. The water pump is also right in that area. When he replaced the timing belt there was a whining noise, so i drove it to his house to fix that. We took it for a test drive, the noise had gone away. But I was hearing a rattling noise so we pulled into a parking lot. I stepped out of the car right into a HUGE puddle of water. Within seconds there was at least a 3 by 5 foot puddle underneath my car, it was just a constant stream. The weird thing is, my temperature gauge read normal. And everything was full..i was basically missing no water. Now, it only seems to leak when I have my heater on..luckily i don't need that right now with the weather. But seriously..what could be going on?

Answer 1

Leaking with the Heater On? Under the Car or on the Passenger flor board? "Under the Car; Hot Water Control Valve for the Heater or the Hose from the Valve. Pasenger Floor Board; Heater core.

Answer 2

Heater Core!!!!!!!!!!!!!!!!!!!!

Answer 3

It’s possible that he over filled the reservoir tank and that was where the extra water escaped. As long as the radiator stays full you will be ok.

Answer 4

Your car is over 20 yrs old, so i suspect your heater core is corroded and leaking. Check the carpeting on the front passenger side . If it's wet, then it's probably the core.

Answer 5

your heater core is leaking. if your car has a water valve it blocks coolant from entering the heater core untill the heat is turned on. what sucks it the heater core is inside the dash.