How does the oil filter work? |
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srlbotanical
Member Joined: 03 July 2017 Location: Saranac MI Status: Offline Points: 395 |
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Posted: 16 July 2017 at 12:58am |
Changing fluids in The Good Dog. I took my filter assembly apart to clean it out and replace the filter. I want to make sure I'm understanding how the 2A bypass filter system works... The oil is fed into the top of the housing, on the outside of the filter, through this fitting: The oil fills the filter housing and perks through the filter from the outside in. The filter sits on the stand pipe, held in the correct position by the spacer below. The oil then weeps though this single small hole in the stand pipe.... And then drains through the return line at the bottom of the housing. Do I have this right? If so, it seems incredibly inefficient. It seems that the standpipe should have a few more holes in it. Am I missing something? Steve
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Steve
1948 CJ2A - The Good Dog 1997 TJ - The Trail Rig 2001 XJ - The kids ride |
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Adrian
Member Joined: 01 Oct. 2011 Location: New Zealand Status: Offline Points: 1517 |
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Don't open the hole or drill more....as its a bypass filter its getting a portion of the oil flow at the end of the lube system.
If you create a bigger hole it has the same effect as very worn bearings and your oil pressure will drop right off. On a modern car the oil is sucked from the oil pan, the all pumped through the filter and then its off to lube everything. On the Jeep, its a small percentage that's filtered, a "bypass" amount. Its better than nothing!. Adrian |
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1946 CJ-2A Column Change 14605
1973 Saab 96 |
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WeeWilly
Member Sponsor Member x 2 Joined: 07 May 2009 Location: Clayton IN Status: Offline Points: 3423 |
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It doesn't weep through that orifice (hole) but is forced through it by the oil pressure of the engine. That is why that hole is small to keep from losing engine oil pressure at that point. The filter canister holds the same oil pressure as the engine. Hope this helps a little.
Jim |
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47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Offline Points: 4950 |
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Not much! Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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srlbotanical
Member Joined: 03 July 2017 Location: Saranac MI Status: Offline Points: 395 |
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Thanks all. Now I understand why some of these jeeps never had an oil filter. I did clean out about a half inch of sludge from the bottom of that canister... So it was catching somthing... I also had no idea it was orange until I started cleaning it off a bit.
Edited by srlbotanical - 16 July 2017 at 1:39pm |
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Steve
1948 CJ2A - The Good Dog 1997 TJ - The Trail Rig 2001 XJ - The kids ride |
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WeeWilly
Member Sponsor Member x 2 Joined: 07 May 2009 Location: Clayton IN Status: Offline Points: 3423 |
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If you think that the filter is not filtering much, take the outlet hose off and you will see how much and how fast the oil is being filtered.
Jim |
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47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Offline Points: 4950 |
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I most likely filters quite well no argument there at all!.... Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Unkamonkey
Member Joined: 23 Mar. 2016 Location: Greeley CO Status: Offline Points: 2093 |
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They only filter around 10% of the oil but at least some of it gets filtered.
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uncamonkey
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Bruce W
Member Joined: 29 July 2005 Location: Northeast Colorado Status: Offline Points: 9651 |
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It ALL gets filtered eventually, and since the flow volume is low, the filter medium can be much finer, more restrictive, and removes particles much smaller than a full-flow filter can. BW
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It is NOT a Jeep Willys! It is a Willys jeep.
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You! We Have Miles to Jeep, Before We Sleep. |
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markcl52
Member Joined: 04 Dec. 2015 Location: Mass Status: Offline Points: 286 |
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I once forgot to tighten the lid on after an oil change. It's amazing how much oil squirted out in the 60 seconds the engine was running before I realized what was happening.
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TateC
Member Joined: 23 Feb. 2018 Location: SLC, Utah Status: Offline Points: 510 |
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I know this is an older thread but I have a question somewhat related. I recently installed a rebuilt engine in to our 45’ CJ and have had it running and it kept good oil pressure. Later when I went to retorque the head nuts after running it, I found I had to remove the inlet line going to the filter and found it to be dry with no traces of oil. I didn’t have the engine running super long but I figured there should be some traces of oil in the line going to the filter. Should I be concerned? Or did I not run the engine long enough to get oil up through the line?
Thanks
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Tate Christensen
1941 Ford GP #9687 1943 Willys MB #263100 1944 Ford GPW #234613 1945 Willys CJ2A #10226 |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7986 |
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The Oil most likely drained back down the hose once the pump stops turning there is nothing keeping the oil in the line. As to the guys in the early part of this thread. If you have 20lbs of oil pressure oil is passing through that filter at the rate of 20 psi. All the oil is filtered every few min. The only difference is if the filter gets plugged you won't starve the engine like a modern filter system will. The Bypass style filtration is very effective.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7986 |
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If you want to know how effective take the intake side line off and put it in a pint jar start the engine and see how long it takes to fill the jar. Multiply that time by 10 and you will have how long it takes for the filter to filter 5 quarts of oil. And it does this continuously while the engine is running. SO unless you think every time the oil goes through the engine it needs to be recleaned its doing its job just fine.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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Ron D
Member Joined: 27 Oct. 2019 Location: South Carolina Status: Offline Points: 1441 |
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This post might be interesting: |
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1951 M38
1951 M100 |
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Triton28
Member Joined: 25 Mar. 2019 Location: Houston, Texas Status: Offline Points: 149 |
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So on my 46 the POV removed the stock filter and plumbed the oil lines to a screw on oil filter, will this be ok for the motor or should I change it back to original?
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Bruce W
Member Joined: 29 July 2005 Location: Northeast Colorado Status: Offline Points: 9651 |
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Oil should have been there almost instantly. Is it possible that someone before you fell for that old wives’ tale and blocked the feed line? Check your feed line for openness and look for a BB in the block fitting. BW
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It is NOT a Jeep Willys! It is a Willys jeep.
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You! We Have Miles to Jeep, Before We Sleep. |
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cpt logger
Member Joined: 23 Sep. 2012 Location: Western Colorad Status: Offline Points: 3043 |
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If there is a .055 diameter restriction in one of the lines you should be OK. However, as I understand it, the original filter element would strain out much smaller particles than the new spin-on filters do. If it were mine I would go with an original one.
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