Forum Home Forum Home > CJ-2A Discussion Area > Tech Questions and Answers
  New Posts New Posts RSS Feed - How does the oil filter work?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

How does the oil filter work?

 Post Reply Post Reply
Author
Message
srlbotanical View Drop Down
Member
Member
Avatar

Joined: 03 July 2017
Location: Saranac MI
Status: Offline
Points: 281
Post Options Post Options   Thanks (0) Thanks(0)   Quote srlbotanical Quote  Post ReplyReply Direct Link To This Post Topic: How does the oil filter work?
    Posted: 15 July 2017 at 7:58pm
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
Steve
1948 CJ2A - The Good Dog
1997 TJ - The Trail Rig
2001 XJ - The kids ride
Back to Top
Adrian View Drop Down
Member
Member
Avatar

Joined: 01 Oct. 2011
Location: New Zealand
Status: Offline
Points: 1516
Post Options Post Options   Thanks (0) Thanks(0)   Quote Adrian Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2017 at 10:00pm
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
1946 CJ-2A Column Change 14605
1973 Saab 96
Back to Top
WeeWilly View Drop Down
Member
Member
Avatar
Sponsor Member

Joined: 07 May 2009
Location: Clayton IN
Status: Offline
Points: 2525
Post Options Post Options   Thanks (0) Thanks(0)   Quote WeeWilly Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2017 at 10:17pm
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
47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
Back to Top
Lee (MN) View Drop Down
Member
Member
Avatar

Joined: 12 Aug. 2008
Location: Harris, MN
Status: Offline
Points: 3287
Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee (MN) Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2017 at 11:09pm
Originally posted by Adrian Adrian wrote:



Its better than nothing!.

Adrian


Not much!

Lee
               LEE
44 GPW-The Perfected Willys
49 2A
67 M715
American Made Rolling History
Back to Top
srlbotanical View Drop Down
Member
Member
Avatar

Joined: 03 July 2017
Location: Saranac MI
Status: Offline
Points: 281
Post Options Post Options   Thanks (0) Thanks(0)   Quote srlbotanical Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 8:30am
LOL

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 8:39am
Steve
1948 CJ2A - The Good Dog
1997 TJ - The Trail Rig
2001 XJ - The kids ride
Back to Top
WeeWilly View Drop Down
Member
Member
Avatar
Sponsor Member

Joined: 07 May 2009
Location: Clayton IN
Status: Offline
Points: 2525
Post Options Post Options   Thanks (0) Thanks(0)   Quote WeeWilly Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 3:16pm
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
47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
Back to Top
Lee (MN) View Drop Down
Member
Member
Avatar

Joined: 12 Aug. 2008
Location: Harris, MN
Status: Offline
Points: 3287
Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee (MN) Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 4:42pm
Originally posted by WeeWilly WeeWilly wrote:

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


I most likely filters quite well no argument there at all!....

Lee
               LEE
44 GPW-The Perfected Willys
49 2A
67 M715
American Made Rolling History
Back to Top
Unkamonkey View Drop Down
Member
Member


Joined: 23 Mar. 2016
Location: Greeley CO
Status: Offline
Points: 1851
Post Options Post Options   Thanks (0) Thanks(0)   Quote Unkamonkey Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 6:18pm
They only filter around 10% of the oil but at least some of it gets filtered.
uncamonkey
Back to Top
Bruce W View Drop Down
Member
Member
Avatar

Joined: 29 July 2005
Location: Northeast Colorado
Status: Offline
Points: 5453
Post Options Post Options   Thanks (1) Thanks(1)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 6:53pm
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
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You!

We Have Miles to Jeep, Before We Sleep.
Back to Top
markcl52 View Drop Down
Member
Member
Avatar

Joined: 04 Dec. 2015
Location: Mass
Status: Offline
Points: 202
Post Options Post Options   Thanks (0) Thanks(0)   Quote markcl52 Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 8:25pm
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. 
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.00
Copyright ©2001-2018 Web Wiz Ltd.