A differerent HV oil pump clearance problem?

[jkmhb]

My '98 was running low pressure, so I installed a high volume Melling oil pump. I had the typical clearance problems, needing to pound on the pan and also bending the pickup up a bit.

When done, I hear a clanking noise like the crankshaft is hitting something. With a stethescope, it is loudest at the the bottom of the lowest part of the pan.

Anyone have this happen?

 

[Slo-Sho]

The crankshaft counterweight is colliding with the oversized pump housing.

 

[jkmhb]

Thanks - think I can take it off and shave enough off so it will clear, without ruining the pump?

 

[Slo-Sho]

Absolutely. I'd give it altleast .020" clearance.

*On a side note, I'd replace all the rod bearings as well if you are experiencing low oil pressure.

 

[jkmhb]

Yes, that was it. The crankshaft was hitting the side of the pump. 4 hours later it was all fixed. Another thing to check when installing a high volume pump. I wonder if they could even be used with a stroker.