I just rebuilt a Mini-Me Setup.

But now I'm leaking coolant.

It was originally coming from the Water Neck Tube near the water pump.
But i replaced the O-Ring and it was fine.

Now it is leaking from the water pump(Brand New).
Took it off, Replaced the seal, but it is still leaking.

I feel like the coolant is getting too much pressure.


The Radiator is fine, came off a running car.
All the Tubes are pressurized.
The only thing i could think of is the heater core.
Could the Heater Core Clog and create too much pressure and bust seals?

What would the be the best way to troubleshoot my way out of this one?

 

Changed out Heater core..

Still leaking from the water pump seal.

 

get one of those tool that pumps air into the radiator. It pressurizes the cooling system and it will tell you immediately where the water is leaking from. You mention coolant is leaking. You cant visually see where the leak is from? Or you mean a slow leak?

 

heater core?

 

Yes. I posted earlier that i changed out the heater core.

 

Is the cooling system possibly overpressurized with exhaust gases due to a bad head gasket?