Forum Home Forum Home > CJ-2A Discussion Area > Tech Questions and Answers > Tech - FAQ
  New Posts New Posts RSS Feed - What oil filter element do I need?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

What oil filter element do I need?

 Post Reply Post Reply
Author
Message
sean View Drop Down
Moderator Group
Moderator Group

Sponsor Member

Joined: 20 July 2005
Location: North Idaho
Status: Offline
Points: 7388
Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Topic: What oil filter element do I need?
    Posted: 10 July 2011 at 2:58pm
Q:  what oil filter element does the CJ-2A use?

A:  depends on which filter canister assembly you have

Over the years, 5 different canisters were used, calling for 4 different elements.  Most auto parts stores (and online filter lookups), when asked for a "CJ-2A" filter, ONLY list 1 or 2, not all 4 possibilities.

The list below was compiled using Willys original part numbers at the manufacturers web site cross-reference lookups.  Try them for yourself:

Fram: http://www.framcatalog.com/
Napa: https://napaonline.com/
Purolator: http://www.purolatorautofilters.net/Pages/home.aspx
Wix: http://www.wixfilters.com/


1) Identify your filter assembly.  Use the parts lists illustrations.  They are plenty clear enough to identify each of the 5 filter assemblies.

2) find the corresponding element below (all dimensions in inches)

Shown in 1st. ('45) & 2nd. ('47) parts lists:

p/n A-1230 -  Oil filter Assembly (Fram F4 "Military Junior", w/2 bands)
p/n A-1236 - Element, oil filter (not listed in any of the cross-references)
superceded by p/n 119952 (Fram C21) in later "Popular Parts List":

Fram:  C4P  -  4.83 h x 4.33 od x .55 id
NAPA:  1100  -  5 h x 4.53 od x .533 id (cellulose)
Wix:  51100  -  5.007 h x 4.094 od x .553
Purolator:  L20051  -  4.69 h x 4.00 od x .54



Shown in 2nd. ('47)  parts list:

p/n 643147 - Oil filter Assembly (Fram w/welded bracket, illustration #27)
p/n 643182 - Element, oil filter (not shown in illustration, does not x-ref)
superceded by p/n 645637 - Element (from illustration)

Fram:  C4P  -  4.83 h x 4.33 od x .55 id
NAPA:  1006 - 5 h x 4.156 od x .553 id, 10 micron (cellulose)
Wix:  51006 - 5.007 h x 4.094 od x .553 id, 32 micron
Purolator:  L30034 - 4.87 h x 4.21 od x .53 id

p/n 645638 - Oil filter Assembly (Purolator 1-band bracket, illustration #11)
p/n 645636 - Element, oil filter

Fram: C134PL - 4.11 h x 3.48 od x .7 id
NAPA: 1080 - 4.218 h x 3.367 od x .578 id, 19 microns
Wix: 51080 - 4.218 h x 3.367 od x .578 iid, 21 microns
Purolator: L20700 - 4.12 h x 3.44 odx .53t/.81b id



Shown in 3rd. ('49)  parts list:

p/n unknown - Oil filter assembly (Purolator 2-band bracket, illustration #18)
p/n 645636 - Element, oil filter (same as above)

p/n 647342 - Oil filter assembly (Fram F3-P2, 2 mounting ears, illustration #8)
p/n 647345 - Element, oil filter

Fram: C3P - 4.22 h x 3.84 od x .55 id
NAPA: 1010 - 4.375 h x 3.718 od x .553 id, 30 micron
Wix: 51010 - 4.375 h x 3.718 od x .553 id, 32 micron
Purolator: L20701 - 4.39 h x 3.72 od x .53 id



Another element listed in the 1961 "Popular Parts List", supercedes 645636:

p/n 911208 (Purolator)

Fram: C134PL
Purolator: L20700

Back to Top
AbeCJ2A View Drop Down
Member
Member
Avatar

Joined: 04 Dec. 2013
Location: Buffalo, NY
Status: Offline
Points: 96
Post Options Post Options   Thanks (0) Thanks(0)   Quote AbeCJ2A Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2014 at 5:27am
My 2A came with no oil filter and I have always wondered if they were an option, or if mine just had it removed.  I'd like to add one and would consider a modern aftermarket remote set-up, or an original, but I'm not sure were to plumb it in.  I see a few possible ports that may have oil pressure, but I'm not sure and have not tested them.  Any comments?
Back to Top
scoutpilot View Drop Down
Member
Member
Avatar

Joined: 30 Dec. 2008
Location: Asheboro, NC
Status: Offline
Points: 4373
Post Options Post Options   Thanks (0) Thanks(0)   Quote scoutpilot Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2014 at 10:30am
The high pressure port is forward and down slightly from the fuel pump. There should be a square shouldered 1/4" NPT plug there. Installation of the high pressure (out to filter) line is best accomplished with the fuel pump removed. Use a 90º fitting.
The low pressure return enters at the timing gear cover top. Brazed to the cover is a 1/4" NPT female fitting. Installation of the low pressure line is best accomplished with the fan removed and the generator displaced.
Back to Top
AbeCJ2A View Drop Down
Member
Member
Avatar

Joined: 04 Dec. 2013
Location: Buffalo, NY
Status: Offline
Points: 96
Post Options Post Options   Thanks (1) Thanks(1)   Quote AbeCJ2A Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2014 at 1:39am
I think I see a plug below and slightly forward of the centerline of the pump which sounds like the one you are referring to, and I also see a square plug in a downward angled port rearward and slightly below the pump that I thought might be the one.  Any idea what that one is for?

Back to Top
scoutpilot View Drop Down
Member
Member
Avatar

Joined: 30 Dec. 2008
Location: Asheboro, NC
Status: Offline
Points: 4373
Post Options Post Options   Thanks (0) Thanks(0)   Quote scoutpilot Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2014 at 11:02am
I believe it is a low-pressure drain plug only removed for rebuilding.
Back to Top
rocketeer View Drop Down
Member
Member
Avatar
Sponsor Member

Joined: 26 June 2008
Location: Lehighton, PA
Status: Offline
Points: 3473
Post Options Post Options   Thanks (2) Thanks(2)   Quote rocketeer Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2014 at 1:22pm







Edited by rocketeer - 22 Oct. 2014 at 1:27pm
Back to Top
scoutpilot View Drop Down
Member
Member
Avatar

Joined: 30 Dec. 2008
Location: Asheboro, NC
Status: Offline
Points: 4373
Post Options Post Options   Thanks (1) Thanks(1)   Quote scoutpilot Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2014 at 1:31pm
That diagram is confusing. It shows the line running to the fitting behind, not ahead of the fuel pump. The photo shows the correct place.
Back to Top
BrianJ View Drop Down
Member
Member
Avatar

Joined: 06 Oct. 2014
Location: Hagerstown, MD
Status: Offline
Points: 564
Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianJ Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar. 2015 at 3:51am
This helps a lot.  My 48 CJ2A doesn't have an oil filter on it either.
Back to Top
WellFedHobo View Drop Down
Member
Member
Avatar

Joined: 16 Sep. 2010
Location: Little Rock, AR
Status: Offline
Points: 630
Post Options Post Options   Thanks (0) Thanks(0)   Quote WellFedHobo Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2022 at 11:06am
I know it's an 11 year old thread, and it's not great forum etiquette to bring back very old threads, but I just wanted to thank sean for the info. I didn't realize there were so many varieties of oil filter canisters and I learned that I have the two band Purolator style, which is why the oil filter and gasket I ordered awhile back don't fit and would never seal. About to head to Napa to see if they have a 1010 filter in stock... (And now it looks like the Fram stickers I put on the cleaned up canister are all wrong.)
Brad
1948 CJ2A #158011 "Sunk Cost Fallacy"
1945 T3-C #1431
Back to Top
Oldpappy View Drop Down
Member
Member
Avatar

Joined: 09 Apr. 2018
Location: Tennessee
Status: Offline
Points: 4813
Post Options Post Options   Thanks (0) Thanks(0)   Quote Oldpappy Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct. 2022 at 12:08pm
Yeah, I just read through this thread not realizing it was an old one, and was about to tell the guy who didn't have an oil filter that I have a couple of them I don't really need.

At one time there was a story circulating around about it being a good idea to remove the oil filter to keep from starving the main bearing journal that feeds the circuit. In my opinion that was not a good idea. 

There was an issue with that, but it is properly resolved by using a timing gear oiler with a smaller port, not removal of the oil filter, but I suspect that is why we sometimes come across Jeeps with them missing.


If you can't get there in a Jeep you don't need to be there!
Back to Top
jaksjep View Drop Down
Member
Member
Avatar

Joined: 03 Nov. 2013
Location: Southern CA
Status: Offline
Points: 471
Post Options Post Options   Thanks (0) Thanks(0)   Quote jaksjep Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct. 2022 at 10:46pm
How do you get the oil out of the filter canister when doing an oil change?
I have used rags, paper towels and several different "suction" devices, but I just can't seem to get it all out.

Has anyone tapped the filter canister near the bottom and added a valve on it to drain it?
My posts are my personal opinion and are not legal advice as I am not an attorney. If you act on any of my comments you do so at your own risk.
Back to Top
JohnB View Drop Down
Member
Member
Avatar
Sponsor Member

Joined: 01 June 2014
Location: Saint Louis, MO
Status: Offline
Points: 391
Post Options Post Options   Thanks (0) Thanks(0)   Quote JohnB Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct. 2022 at 10:52pm
I use a dedicated turkey baster to remove the remaining oil. 
Back to Top
Bruce W View Drop Down
Member
Member
Avatar

Joined: 29 July 2005
Location: Northeast Colorado
Status: Online
Points: 9611
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov. 2022 at 12:59am
  Yep, turkey baster. Some have a drain plug but it’s not really on the bottom. There are a lot of places in the engine that can’t/don’t drain completely. You never get ALL of the old oil out of the engine. A teaspoonful of old oil in the filter can isn’t going to hurt anything. 
BW 
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.
Back to Top
cpt logger View Drop Down
Member
Member


Joined: 23 Sep. 2012
Location: Western Colorad
Status: Offline
Points: 3022
Post Options Post Options   Thanks (0) Thanks(0)   Quote cpt logger Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov. 2022 at 3:42am
If it is critical to remove all of the oil from the filter, I unbolt it & turn it upside down. Then I flush it with clean solvent or diesel. Otherwise, I use an old oil pump off of a Chevy 216 engine driven by a drill motor & rags. I then use solvent or diesel to get all the sludge out. I do not remove all of the old oil if it has no sludge. The new oil gets diluted with the dregs of oil still in the crankcase anyway. IMHO, Minor dregs, not sludge, in the filter will not make any difference.

It is critical to have a clean oil filter housing if one ever finds any shavings or chunks in the oil, metal or other material. It is also critical if the engine has tossed a rod, broken a crank or cam shaft, burned a hole in a piston or a valve, or any other catastrophic failure.

IHTH Cpt Logger.
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2022 Web Wiz Ltd.