Quote:
Originally Posted by Lenny Bruce
Hello friends. I’m going to swap the old water pump for a new leakless. I heard from a fella that after installing the new pump he couldn’t completely fill his radiator because it would spit out coolant of the radiator cap? Any insight on this?
Thanks
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I had this experience after installing a new water pump, although for me it goes out the tube, not the cap. I suspect it's because with the old pump impeller the circulation flow is less than with the new impeller, and the engine internals gunk up. Once you put the new pump on the suction side of the system (engine) can't keep up with the pressure (upper tank) side, and it overflows.
I top off my radiator until it just shows above the baffle, but then after some driving it seems like it wants about a quart to a half gallon more to bring it back up. I can hear the coolant going down into the core (tubes) when I pour it back in. My preference would be to put in coolant until it just covers the tubes, and maintain it there, but I can't see the tubes because the baffle is in the way. I don't think it's leaking anywhere (head gasket is new) but I'd hate to run it dry inadvertently. I may try to capture the overflow from the tube and see if that's the volume that is lost, I'd feel better about fluid levels then.
JayJay