which oil pump?
06-11-2017, 06:39 PM
#1
Junior Member
Thread Starter
which oil pump?
As part of an engine build I need to choose which oil pump: melling or omix-ada.
The omix-ada is $25 more than the melling, so is it worth it?
The omix-ada is $25 more than the melling, so is it worth it?
06-12-2017, 04:35 PM
#3
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Join Date: Sep 2008
Location: Sioux Falls, SD
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Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L
Melling works fine. I put the Melling HV pump in my '92 4.0. Had to bash the oil pan to get it to fit. Didn't help my oil pressure at all. This was years ago too. I also run the risk of stripping the pump drive with the HV pump and thicker oil. fail.
06-13-2017, 07:25 AM
#5
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Year: 1999
Model: Cherokee
Engine: 4.0
Read post #3.
There have been many cases of the oil pump drive gear wiping out when a HV pump has been installed. In some cases, the pump mounting flange on the block interferes with the pump flange, requiring removing metal from the block so the pump seats properly.