Waterpump/ Heater Core Issue - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

dgford · 01-08-2013, 09:55

I have currently an intermittent waterpump leak. It'll leak profusely and leave a puddle underneath the car one day, then nothing for days or weeks. I know the pump is on its way out, but I'd like to find out how much of the problem originates in the heater core. I've noticed recently a trickling/ gurgling sound coming from where the cooling system goes into the heater core. Could
air be entering the cooling system from something in the heater core? I'm wondering also whether coolant additives for something like this are a good idea.

**R.S.LOGAN** · 01-08-2013, 10:30

Think you will have to replace leaking water pump first before you cause more damage running the car .Noise you hear could be caused by low coolant .

dgford · 01-08-2013, 13:00

Alright thanks. I've done a waterpump replacement before. I burped the system a couple of times, probably not completely. I had a Mustang for a while with a very similar problem for several years and just lived with it, it never got much worse or better.

**R.S.LOGAN** · 01-08-2013, 13:37

Bleeding the system should help , check hoses going into core o.k for heat .As for coolant additives , if you mean sealants dont use them , only as a last resort if you dont want to carry out repairs . If it's the water pump bearing / seal leaking , additives wont help .

**360ci** · 01-16-2013, 14:09

I concur on the don't use the additives. If you haev a leak that's noticeable, it's knowingly too late to even try using a stop-leak product and you just waste your money putting off the inevitable anyway.