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post #1 of (permalink) Old 12-14-2000, 12:16 PM
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2 oil filters??

I have a 95 YJ with a four-banger and the standard oil filter on the block. I also have a external oil filter mounted on the fender under the jack. From all the abuse the tiny bolts holding it on broke. It fell onto a pulley, which rubbed a hole and drained every drop of oil in a matter of seconds. Did this come from the dealer? Is this needed?

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post #2 of (permalink) Old 12-14-2000, 12:44 PM
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Re: 2 oil filters??

[img]/wwwthreads_images/icons/smile.gif[/img] Ordinarily, an auxillary filter like that is for some kind of special purpose use; like we had a setup back in the fifties and early sixties which use a roll of toilet paper to filter the fine stuff out. It was used as a supplementary filter. HOWEVER.....it became known that filters which have less than a 5-Micron opening will actually strain out the additive package that is in the oil, so for the mor modern engines and the more modern lubricants, the toilet paper filters were not really appropriate. But, back to your Jeep.....unless you have a secure mount and real secure plumbing, a second filter is a reliability problem as you have found out. You should be fine with a NAPA GOLD full-flow on the block. One thing you might check on, however, is IF a bigger filter will fit your engine. On our '97 Grand Cherokee, we tossed the coffee cup sized stock filter that the 4.0 Six came with and we use the bigger Mopar filter, FRAM PH8-A filter which gets us up to SEVEN QUARTS of oil total, engine and filter.[img]/wwwthreads_images/icons/crazy.gif[/img]

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post #3 of (permalink) Old 12-14-2000, 03:01 PM
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Re: 2 oil filters??

Unless you are in the habit of putting some REALLY crappy gas, along with maybe some water, mud, and dirt into your engine, there isn't any reason you need a second (or even bigger) oil filter. The filter is designed to correspond to the size of the engine, and swapping in something different or adding an aux. is pretty pointless. just stick with what's stock, it won't fail you. After all, if something goes wrong, this is pressurized ENGINE OIL we are talking about here, not a good thing to have spraying onto the ground...kinda hard on the moving parts....

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post #4 of (permalink) Old 12-14-2000, 06:43 PM
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Re: 2 oil filters??

[img]/wwwthreads_images/icons/tongue.gif[/img] I'm going to take issue on this one with "Wrangler40". I think that more oil is better......period. In the sixties, Porsche used to win the 24 Hr Enduros quite frequently, and I wondered why till I looked at a 911 which had a TANK of oil and a double-pump dry sump system. He had four gallons, the rest of the racers had four quarts. No big mystery there.[img]/wwwthreads_images/icons/tongue.gif[/img] We even use a truck filter on our(Redneckmobile) 3/4T GM 4X/350/Sm465/205 to add an extra Qt. Maybe that's why the engines go 275K between overhauls?[img]/wwwthreads_images/icons/crazy.gif[/img]

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post #5 of (permalink) Old 12-14-2000, 09:05 PM
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Re: 2 oil filters??

Oil is like coolant, more is better. More oil allows many things.
1. More heat dissipation
2. Takes more contaminants to overwhelm the oil additives.
3. Also, a larger filter can remove more crap from the oil without becoming plugged.

Nick Hagen
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