Water pump or crank pulley

[talvez]

Originally Posted by Steve Tinker

The crank pulley is just that - a pulley bolted directly onto the crankshaft, so IF you've pinned down the noise correctly, its the crank main bearings or end float thats making the noise.

Id like to know more about what the causes of a noisy crank pulley can be. Is there any other ways the pulley would be making noises? Im also having noise come from the crank pulley.

A floating crank end or bad main bearings is not what I need right now.... Would a bad end float cause a leak to form behind the pulley?

thanks you guys

[Benjamin]

Originally Posted by talvez

Would a bad end float cause a leak to form behind the pulley?

I'm assuming you're getting an oil leak from there and that's why you are asking.

There is an oil seal there and excessive end float shouldn't cause it to leak, because "end float", as I define it, is excessive movement of the crank moving in and out, along the axis of the crank. The seal should continue to to work in this case. A bad bearing would lead to run out, in which the pulley end would move side to side. This could potentially lead to the seal leaking. Or the seal could just be old and tired and leaking or some debris from the inside has compromised it.