Oil Pump?

Post by **EVIL95XJ** » May 24th, 2012, 3:47 pm

high volume or not?

Post by **604rail_king** » May 24th, 2012, 4:55 pm

it really comes down to personal preference (or budget) as both work fine.

from what i gathered when researching, many went with the High Volume Melling for a few key reasons. i went with the HV also (yet to be installed). it does require you to massage the pan though.

Post by **EVIL95XJ** » May 24th, 2012, 5:50 pm

no real pros or cons besides the pan?

Post by **Muad'Dib** » May 24th, 2012, 6:03 pm

No need for the HV unless you plan on running loose bearing clearances.

Post by **IH 392** » May 24th, 2012, 7:09 pm

Muad'Dib wrote:No need for the HV unless you plan on running loose bearing clearances.

YEP!, if your clearances are correct there is NO need for an oil heater pump!

Post by **cruiser54** » May 25th, 2012, 5:22 am

Know where the HV oil pump came from? It wasn't developed for any particular high performance applications. According to my buddy at JeepTech, it was a military specified pump for some 4.0s that the military used in certain applications and that had a different oil pan. I use them.

Post by **SilverXJ** » May 25th, 2012, 7:13 am

Different oil pan? Does he know what was different about them?

The Mopar stroker comes with a HV pump for some reason.

Post by **cruiser54** » May 25th, 2012, 2:28 pm

SilverXJ wrote:Different oil pan? Does he know what was different about them?

Actually straighter cut gears than stock and obviously a bit longer gears. The stock pump has barely discernable angle to the gears.

The Mopar stroker comes with a HV pump for some reason.

Post by **SilverXJ** » May 25th, 2012, 2:42 pm

cruiser54 wrote:Actually straighter cut gears than stock and obviously a bit longer gears. The stock pump has barely discernable angle to the gears.

I was asking about the oil pan.

Post by **cruiser54** » May 25th, 2012, 7:51 pm

Who knows what the engines were in. Maybe they didn't need to clear a front axle.

Post by **SilverXJ** » May 25th, 2012, 8:08 pm

I would assume it was a Jeep, most likely a XJ or TJ.

Post by **cruiser54** » May 26th, 2012, 4:44 am

I'll ask him when I get a chance. For some reason I seem to think it was some kind of equipment power plant.

Post by **Cheromaniac** » May 26th, 2012, 6:44 am

604rail_king wrote:it really comes down to personal preference (or budget) as both work fine.

from what i gathered when researching, many went with the High Volume Melling for a few key reasons. i went with the HV also (yet to be installed). it does require you to massage the pan though.

What he said. A HV oil pump isn't really necessary unless you have loose bearing clearances but if you do use one anyway, just make sure your cold start oil pressure isn't above 60psi otherwise you could accelerate distributor gear wear. If necessary use a thinner grade of oil.

Post by **cruiser54** » May 26th, 2012, 7:32 pm

My oil pressure is not particularly high at all. Same as my Comanche with stock oil pump.

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