Engine/Transmission (1998.5 - 2002) Oil Filter ?

[John Berger]

Will an oil filter that is nearing it's capacity or that already has reached it's capacity, cause an engine to use oil?

 

[Mad Max]

Use? Consume? Loose?

I beleave that either Fleetguard filter has a bypass function, so as a filter fills and becomes restricted, oil pressure pushes the filteration media cartridge downward against the bypass spring and the oil circumvents the restricted filtration media, GOING UNFILTERED TO THE ENGINE.



The bypass comes into play on cold startups when oil can be thick, more so than when the media nears the end of its life.



If you had a filter w/o a bypass, I supspect you would start to see a rise in oil pressure first.



Hope this is of some use.



MaX



Ps. If you suspect your filter is at its end, why not change the oil... oil and filters are cheap compared to lube starved components or blown seals.

 

[John Berger]

It's not an oil filter or oil problem, here. Just curious. Thanks.

 

[amsoilman]

Contaminated oil or oil that is beyond its service life can cause oil consumption. As Max said, the oil filters you are using do have a built in "by-pass" valve. As a mater of fact, all oil filters have built in by-pass valves. This is a requirement!



Wayne

amsoilman

 

[Steve Campbell]

Wayne....

If a person has a good bypass oil filter on and using a good oil (Not intended to start an :-{} ), will "consumption" or oil sample be the first indicator that the oil is "beyond its service life"?

 

[amsoilman]

Steve,

An oil analysis is usually the best way to determine if an oil is still serviceable, however, dirty oil can cause oil consumption as the seal between the rings and cylinder wall will not seal properly. Also, when rings get carbon on the back side of the rings in the ring grooves, the rings will not move properly to allow them to properly seal.



I have seen cases where oil rings were broken cause oil consumption, and yet the oil was still in good shape, so oil consumption is not a really good indicator of oil serviceability.



My philosphy is if your going to extend oil drain intervals, an oil analysis program is the best way to go!

Wayne

amsoilman

 

[Texas Diesel]

Not intending to start an :-{} , all oil filters do NOT have built in bypass valves. From what I have seen and read, the ISB engine has the bypass valve built inside the engine itself. The filter is a non bypass type, relying entirely on the built in bypass valve.

http://www.websorcerer.com/GeekOut/ This shows a non bypass (pressure relief) filter on the left.



Also, I have never seen a dirty oil filter cause an increase in oil consumption. How could it?

 

[amsoilman]

texasDiesel,

Thanks for pointing this out! I was thinking Most "Full-Flow" oil filters have no "by-pass valve', and wrote"ALL" instead.



You are quite right, the Cummins application does not have by-pass valves built in the filter elements. As to the comment, "Dirty oil filters can not cause oil consumption", If you re-read what I said, I said, "Dirty oil can cause oil consumption"



Wayne

amsoilman

 

[Texas Diesel]

Amsoilman, the comment I made was to answer John Berger. It was half statement and half question.



I have noticed that my Dakota will not use any oil for 2000-2500 miles then abruptly drop 1/2 quart and stay there. I always believed that this was the point the oil "broke down". The oil analysis guys say that oil does NOT break down



I was wondering of this tied into John Berger's original question about a dirty oil filter causing oil consumption.



Off topic: I read that Amsoil does not certify it's oils in order to avoid some sort of beauratic nightmare? What do you think?

 

[John Berger]

The funny thing is

... I'm not sure that there was consumption. The dipstick level read low at that one stop on my trip home. I added a quart at this stop in Kentucky and was going to check it at the last fuel stop I planned on making in Savannah. When we wrecked the oil level was pretty much the last thing on my mind. There just may have been more oil in the filter at that stop. I only sat there long enough to fill up. The oil level has been right on ever since and I've towed the 5'er a couple of times.