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Depending on what's in the way and the size of the filter, you may not have room for it on the side of the block. It may hit what is in the engine bay. The filters aren't exactly short. And, with it on the side of the block, you get oil dripping down the side that you have to clean up. Of course, you have to deal with whatever is under the filter getting dripped on anyway (usually the axle).

Has anyone had experience with doing away with the oil filter adapter housing in its entirety? This would allow you to eliminate the issues with the adapter gaskets leaking. I've read a few things about just putting that nipple that the oil filter mounts onto directly onto the block and the oil filter fits perfectly on the machined surface. Does this reliably work? any downsides? Why would AMC put an adapter housing if it could very easily run without one? Here is one of the threads I found: https://www.jeepforum.com/threads/oil-pressure-sending-unit-jeep-4-0-into-1988-wrangler.4379423/

Bosch fogs are quite small....

Sorry didn't see this, it was on the second page of the thread. Good luck to you! I would've taken the chance but with this being my daily I couldn't risk leaving my truck out of commission for more than a day.

Yeah that's the fel pro kit that people often say is missing a gasket of a particular size, so I'm playing it super safe by just buying the exact gaskets I need by the SAE size. Some people say it works OK but FWIW I only see 91+ people saying it works on the reviews. Every Renix person that left a review said that it was missing something. Edit (again): When I clicked on the link ,I was on my phone and thought that the kit you linked was the singular large gasket ES70301 and not the full 5 piece kit, so that's my mistake

I guess I'll get it and find out! I'll post back what I actually get and if it all fits. It does say it is guaranteed to fit so if it doesn't, pretty sure I can return it, I am on first name basis with the local NAPA crew!

There are a couple different configurations based on year. I think this kit has enough to cover the variations with the extras left over.

No problem, 3 is far superior to 0! I am a little confused, the Napa online catalog show this as being 5 gaskets? Sounds like you believe this items is only 1 gasket not 5? Am I missing something?

I’m gonna do a spring clearance sale. All small parts are free(minus shipping cost) from now until the end of April!

87-90 Renix Model O-rings 0.799 x 0.103 AS568 size -117 1.296 x 0.139 AS568 size -219 2.484 x 0.139 AS568 size –230 Dealer Part Numbers for Renix. Sold individually: 33002970, 33002971, 33002972 Renix kit from Crown Automotive-33002970K 91-01 HO Model Orings 0.676 x 0.070 AS568 size -017 0.859 x 0.139 AS568 size -212 2.484 x 0.139 AS568 size -230 From Don himself. Would I ended up doing was buying that fel pro gasket that you found and then an o ring assortment kit that contained both an AS568 117 and 219, for about $13. The big fel pro one is the AS568 230 which is almost impossible to buy individually or as part of an assortment kit. All of the kits that I found stop at 226. 230 is just an uncommonly large size I suppose Edit: sorry for replying three separate times. I knew I could answer the first question and then after a little bit realized I can answer the other one, and then the third question you had lol.

Also keep in mind that is just one of three o rings necessary to fully replace them on the OFA. There’s still a medium and a small one that go on that shaft that screws into the block

Yes that one will fit. That’s the biggest O ring out of three. I cross referenced the part number and it matches up with OEM

Here's a kit at Napa that says it is guaranteed to fit. Anyone used it? https://www.napaonline.com/en/p/FPGES72962

Most of the time I check with the dealer, and tell them it's a 1990, they just tell me their database no longer goes back that far. Can you post the OEM Mopar kit part number and where one can get it these days? 1990 4.0 Renix btw, just in case..

I didn't see it mentioned here but I had a sudden massive oil leak on a Cherokee ('88, Renix, 4.0) and it was a failed sending unit - cheap and easy.

Yep that’s a big if for sure. I mean, it has to be the adapter with how the oil spray is positioned. I’ve never heard of a valve cover gasket causing spray of the volume I’m seeing (save for a total catastrophic failure, which is not the case) and it’s almost entirely localized around the area of the oil filter, including the AC hoses around it, the expansion tank, and the side of the distributor cap that’s facing it.

I do have it venting, it’s just not going through the air box to stop it from soaking my air filter for the meantime until I have the time and tools to redo the valve cover gasket and do the valve cover mod at the same time. Like I said before, I’ve had this issue since I got the truck, even when the original CCV hose was installed. The reason I took it off was that the grommet was so deteriorated that it was letting a lot of oil out onto the valve cover. I had a spare PCV grommet so I just stuck that on there with an old PCV hose and then just routed it towards the ground. I know the diameter of that hose is quite a bit smaller than the CCV hose but I havent seen anything occur as a result that wasn’t already happening before so I think, while it certainly isn’t helping, it’s likely not the main culprit. The only reason I’ve put off just putting on the CCV it’s that I would have to buy an entire new vacuum harness just to break off the hose that I need. I have an HO air box and a capped EGR so my vac routing is very simplified.

Will do. I just found the Kei truck I want to buy, plan to head down to Maryland this weekend and drive it home.

my 89 was on large hex bolt thru the housing. IIRC used a 'kit' from Mahle, Felpro also has a 'kit'.... I'd watch out for off-brands as the o-ring material can be inferior. not finding Mahle kits on regular sources ( amazon, evay ) but fel pro is showing.... leery of some of the others. heat and time does a number on these.... for what it is woth... why not OEM Mopar kit? IF this is where your leak originates...

Yeah, I have heard that some RENIX engines had a plain hex head bolt. Those are easier to remove since the clearance issues using a Torx or Allen socket are not a factor.

Can we talk more about this CCV situation? Is the crankcase able to relieve blowby pressure through its vent on the valve cover, as its supposed to? If its building excess pressure in the crank, that pressure is gonna want to find a way out. The dipstick tube looks pretty central to the oily mess. Any chance thats whats going on?

This is awesome. You've gotta post pics when its done.

On my Renix one it is just one large external hex. It's doable, I personally did it from under the truck.

Awesome. I'm not entirely sure how I'm going to get a torx to fit on that bolt with a ratchet to go with it if that's the case. Is it possible that I have just a regular hexagonal bolt head? I felt all over the bolt itself earlier to try to see if it was a torx or allen or something but I didn't feel any divot on it. The face of it was smooth. But the bolt itself was definitely hexagonal and I really feel like I can get a wrench on it. The video that I linked showed his being a 3/4" that he got off with a wrench but of course it was an HO. There is a tooooon of gunk all over that area so it's totally possible that it fully filled in the hole where a torx or allen head would be. And I've heard those horrible things about trying to breaking the bolt loose. I also read about a tip to do the job not long after driving it around so the heat of the engine helps loosen things up.