Oil Pump to Crankshaft Clearance?

ty20404

Member
Joined
Feb 14, 2011
Location
Wilmington
I'm putting a Melling HV oil pump into my 4.7L stroker as I put the pump that was in my 240k mile engine when I got this one and at hot idle my gauge drops dangerously low and I'm getting a tick...

How much clearance do I need between the pump and the crankshaft? I don't even have .100" in there.... It's more like .075". That doesn't sound like enough to me.
 
I'm not familiar with the 4.0L, but the clearance between pump and crank shouldnt matter much. You should be concerned with the clearance of the pickup to the pan. Sounds like maybe your bearing clearances are on the high side.
 
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