E46Fanatics - View Single Post - Heater core coolant leaking externally?
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Old 02-13-2020, 06:23 PM   #7
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Join Date: Feb 2020
Posts: 10
My Ride: 04 bmw 325i
Originally Posted by docnabimmer View Post
Agree with eff- no stop leak .check your work and while your at it, I hope you made sure your water pump and thermostat are new and or not leaking .....otherwise replace if it has not been replaced.water pump leak right about the same place as well.

I bought original “genuine” pipes to make sure they last as long as possible this area seems to be dry no stains nothing, the rest of the cooling system has been done about a year ago, hoses, radiator, water pump, thermostat etc... everything except heater core, it seems weird how all of a sudden i put a new heater valve and that leak started, my old heater valve was clogged which didnt let the coolant make its way to the heater core.

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