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King Cat carb, rebuilt the top end of the motor, left the original water pump in place. Got the motor put back together, filled with coolant, no problem. After the first run couple of minutes, coolant leaking. Tracked it to the weap hole behind the pump. Pulled the seal out, replaced it with a new one. I even put a little silicone around the lip of the metal part, and inside the impeller where it mounts to the shaft, just to be sure.
Filled with coolant, no problem. Start and run, start leaking again. WTF?????
Now here is the interesting part, engine running, cap off(no pressure), the leak stops. Put the cap on or shut the engine off, starts dripping.
This is a steady drip about 2 seconds apart, and will drain the whole engine part of the system in a few hours.
I just don't understand how that much coolant can be getting past a brand new seal.
And yes, I checked with the mechanic at the dealer to make sure I put the part in the back of the impeller in correctly.
I am at a loss, is there something I'm missing, something I can do differently, just don't understand.
Any ideas?
Filled with coolant, no problem. Start and run, start leaking again. WTF?????
Now here is the interesting part, engine running, cap off(no pressure), the leak stops. Put the cap on or shut the engine off, starts dripping.
This is a steady drip about 2 seconds apart, and will drain the whole engine part of the system in a few hours.
I just don't understand how that much coolant can be getting past a brand new seal.
And yes, I checked with the mechanic at the dealer to make sure I put the part in the back of the impeller in correctly.
I am at a loss, is there something I'm missing, something I can do differently, just don't understand.
Any ideas?
