as title states. just did this. the big o ring was very brittle, as anticipated. the 2 on the bolt were fine. I changed them all anyhow.

saw what everyone fusses about regarding room to remove the bolt. I took that bolt out of the frame rail right by it just to get a bit of extra room. removed oil filter. ended up buying a 3/8 drive t60 socket w "removable" torx insert. I used a hammer and punch; it came right out. put a 12mm wrench on the opposite end of the torx side after it was in the bolt. had to put a jack handle on the wrench to break it free. I saw no thread sealant or anything on the bolt that some have stated. I did put med lock tite on it upon reassembly.

you mopar fanboys will be glad to know I used a mopar oil filter haha

 

Great news on the oil filter!!!

 

I used a 5/8 wrench. No problem. I also replaced the metric oil filter spigot with a standard thread part so I can use a regular oil filter. I have a Motorcraft FL 2000 on right now.

 

Thread nipple for later model oil filters on a Renix. 53007563AB

 

That's the one. A very worthwhile mod if you're changing the O rings.

I found this list of oil filters on jeep forum"

LARGER THAN STOCK (note: most of these can be used on a stock 91+ XJ with the horizontal housing. they are also readily available at most parts stores)
Ford FL-1A
Wix #51515
Napa #1515
Amsoil EaO15 "Nanofilter"
Baldwin B2
Baldwin B2-HPG
Bosch 3500
Denso 150-1004
Donaldson P169071
Donaldson P550008
Fleetguard LF3313
Fleetguard LF3487
Fram HP1
Fram PH8A
Fram TG8A
Fram XG8A
K&N HP-3001
Mobil 1 M1-301
Mobil 1 M1-301EP
Motorcraft FL-1A
Professional's Choice Q1A
Purolator PremiumPlus L30001(the one i used in this write up)
STP S8A
Supertech ST8A


MUCH LARGER THAN STOCK (note: these can ONLY be used on renix XJ's with with vertical housing. and these arent as easy to find in stock at most parts stores, though they can order them)
A/C Delco 2142 (forgot the leading letters)
Fram PH977A
Napa #1773
Wix #51773
Motorcraft FL-299
FL-299 Equivalents
Baldwin BT237
Baldwin BT251
Donaldson P550299
Donaldson P554407
Fleetguard LF697
Purolator PremiumPlus L40017
"GIGANTO" Filter
Napa 1714/Wix 51714

 

Here. I fixed the list for you.

LARGER THAN STOCK (note: most of these can be used on a stock 91+ XJ with the horizontal housing. they are also readily available at most parts stores)
Ford FL-1A
Wix #51515
Napa #1515
Amsoil EaO15 "Nanofilter"
Baldwin B2
Baldwin B2-HPG
Bosch 3500
Denso 150-1004
Donaldson P169071
Donaldson P550008
Fleetguard LF3313
Fleetguard LF3487
K&N HP-3001
Mobil 1 M1-301
Mobil 1 M1-301EP
Motorcraft FL-1A
Purolator PremiumPlus L30001(the one i used in this write up)



MUCH LARGER THAN STOCK (note: these can ONLY be used on renix XJ's with with vertical housing. and these arent as easy to find in stock at most parts stores, though they can order them)

Napa #1773
Wix #51773
Motorcraft FL-299
FL-299 Equivalents
Baldwin BT237
Baldwin BT251
Donaldson P550299
Donaldson P554407
Fleetguard LF697
Purolator PremiumPlus L40017
"GIGANTO" Filter
Napa 1714/Wix 51714

 

so will a motorcraft FL1A fit my 91 as it is now?

 

Yes.

 

flippin awesome. means my XJ and my 87 Thunderbird use the same one, wont have to keep a variety of filters around

EDIT: just did some quick research and found that the FL400S that my wife's 93 Escort specs can be swapped out for a Fl-1A as well.

 

just want to add to this..

I used a universal oring kit the first go round. the big one was orange. don't do this.

a month or so i noticed a fairly substantial oil leak. i was dumbfounded and super pist at my discovery, given all of the gaskets I've changed and the fact i had no oil leaks for a few weeks.

the oring i had used on the OFA was the culprit. apparently it sealed fine when it was new, but as time went on i guess the heat cycles and general compression squished it enough it no longer worked. i bought a jeep OFA specific oring, visibly thicker, and replaced the orange pos today. no leaks.

 

I did the same thing. The large orange O-ring does not work. Had to get the o ring set from a Jeep dealer and that fixed my leak right up.

 

Yup. Cheap ain't always the way to go.