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- Joined
- Aug 7, 2007
- Messages
- 1,794
- City
- Costa Mesa, CA
- State - Country
- CA - USA
- Other
- 2004 Bronco Badlands
- Vehicle Year
- 2002
- Vehicle
- Ford Ranger
- Drive
- 4WD
- Engine
- 4.0 V6
- Transmission
- Manual
- Total Lift
- 1.5"
- Tire Size
- 33"
I recently pulled my 4.0 SOHC to do a cam timing chain rebuild. It had 265K miles on it and I elected not to do a bottom end rebuild. I did install a Melling high volume oil pump to help with more clearance in the bearing do to wear at that mileage.
Normally, I probably would not have installed a high volume oil pump, but I run a bypass micron oil filter in addition to the stock oil filter. The micron filter takes about 15% of the oil flow. With 265K miles on the bearings, I think that 15% oil flow loss could start to present a problem. After towing for a long distance, the oil pressure gauge would flicker at idle. It doesn't do that anymore with the new oil pump. It may have improved with just a new standard oil pump but I didn't want to take a chance.
Normally, I probably would not have installed a high volume oil pump, but I run a bypass micron oil filter in addition to the stock oil filter. The micron filter takes about 15% of the oil flow. With 265K miles on the bearings, I think that 15% oil flow loss could start to present a problem. After towing for a long distance, the oil pressure gauge would flicker at idle. It doesn't do that anymore with the new oil pump. It may have improved with just a new standard oil pump but I didn't want to take a chance.
