Water Pump Noise
Thread Starter
Teching In
Joined: Oct 2013
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Water Pump Noise OK, I just got everything back together. I replaced the radiator, opti-spark, ignition wires, spark plugs, thermostat, water pump drive seals, opti-seals and general cleaning / replacing of vacuum lines.
I crossed my fingers and started it up. First start I heard a quick sound of grinding gears, I shut it down real quick. After looking for the obvious and finding nothing I started it again. It started right up and has a very smooth strong idle. I let it idle for about 5 minutes and sounds great. Once it starts to reach operating temperature the radiator starts spills some coolant and then it started to make an awful gear grinding sound. It sounds like it was coming from the water pump. I shut it down again and after a few minutes I restarted it no gear grinding sounds but it was getting dark so I didn't have to time to let it warm up again.
Could I have not lined up the water pump drive coupler correctly ??? It took a few turns to get it to line up and seat. I figured either it seats or it doesn't.
I'm really gonna hate taking things apart to get this right. Any ideas or advice ??? Does anybody have similar experiences ???
Thanks,
I crossed my fingers and started it up. First start I heard a quick sound of grinding gears, I shut it down real quick. After looking for the obvious and finding nothing I started it again. It started right up and has a very smooth strong idle. I let it idle for about 5 minutes and sounds great. Once it starts to reach operating temperature the radiator starts spills some coolant and then it started to make an awful gear grinding sound. It sounds like it was coming from the water pump. I shut it down again and after a few minutes I restarted it no gear grinding sounds but it was getting dark so I didn't have to time to let it warm up again.
Could I have not lined up the water pump drive coupler correctly ??? It took a few turns to get it to line up and seat. I figured either it seats or it doesn't.
I'm really gonna hate taking things apart to get this right. Any ideas or advice ??? Does anybody have similar experiences ???
Thanks,
TECH Veteran
Joined: Apr 2008
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when the coupler is sandwiched beyween WP & TC and is on the spline shafts it has no where else to go so it would be on right. assumed you grease the WP splines and inside coupler and new "O" rings
maybe the "new" WP is bad
maybe the "new" WP is bad
At this point, have you let it run long enough to bleed all of the air out of the cooling system? If the engine sounds OK mechanically, what you might be hearing is the "gurgling" of air trying to work its way out of the system.
Thread Starter
Teching In
Joined: Oct 2013
Posts: 12
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I took the water pump off again and the splines were not damaged anywhere. The coupling also had no damage. I then reinstalled the water pump, put grease on the coupling, and made sure it lined up correctly. While I was reinstalling the fan assembly I spun each fan and the left side fan makes an ugly grinding sound. I wish I had done this in first place, LOL. I guess I should had examined the problem closer. The water pump is not an "on-demand" water pump it always spins not just it reaches operating temperature.
