mjeff87 Posted May 15, 2021 Share Posted May 15, 2021 Finally got under the KJ to diagnose the PITA drip/leak it has. Thought it was in the trans, but turns out its on the block. Theres a sensor of some kind, I thought it might be the CPS but after googling a bit I don't think it is....its on the passenger side rear of the block, down low, almost where the block mates to the BH. Its got a pigtail coming off of it. Anyone know what it is? The sensor works fine (whatever it does) but I'm guessing the oring that seals is has gone bad. I can't see it leaking, but its obvious thats where my leak is coming from. Completely dry above it, but shiny/glossy all around it and below it. edit: it is DIRECTLY behind the passenger side cat converter....whatever it is, its going to be a real treat to swap out. Thanks, Daimler Chrysler. Link to comment Share on other sites More sharing options...
Pete M Posted May 15, 2021 Share Posted May 15, 2021 photo? Link to comment Share on other sites More sharing options...
JustEmptyEveryPocket Posted May 15, 2021 Share Posted May 15, 2021 diyalldata.com Seems to be great for diagram information and shop time estimates. Fairly low rate for the amount of material I have received on other vehicles. Maybe it would help? Link to comment Share on other sites More sharing options...
mjeff87 Posted May 15, 2021 Author Share Posted May 15, 2021 Thanks. I took it to my buddy's house, who has a huge (like 50x100, 4 bay) garage so I could get it way up in the air so I could get underneath it without a tranny pan in my face and dig around. Didn't even think to get a pic. Ima do some more goggling tonight... I have the full 3.7 engine manual (90 some pages, i used it extensively when i pulled the head) but it doesn't mention this sensor. Link to comment Share on other sites More sharing options...
mjeff87 Posted May 16, 2021 Author Share Posted May 16, 2021 Pretty much confirmed that it's the CPS after a couple more vidjeos on boobtube. I'm going to run down to the junkyard a bit later today and figure out how to get it out. Ill use the oring on it to match up a new one for mine. Worst case is I break mine getting it out and ill have a spare so I won't be stranded. Link to comment Share on other sites More sharing options...
mjeff87 Posted May 18, 2021 Author Share Posted May 18, 2021 Screw it, bought a ching-chong replacement sensor (car quest brand) from AA today. Cashed in a bunch of speed perks rewards i had built up, only paid $16 for it. Ill swap it in tomorrow, then get a new o-ring for the OEM one and keep it as a spare. Link to comment Share on other sites More sharing options...
Pete M Posted May 18, 2021 Share Posted May 18, 2021 sometimes ya just gotta bite the bullet and go with what's available Link to comment Share on other sites More sharing options...
mjeff87 Posted May 19, 2021 Author Share Posted May 19, 2021 Yeah....that 21 year old OEM sensor is straight up welded to the block. I got it to rotate about 120 degrees after copious amounts of PB and time. I finally threw in the towel and tightened it back up, for fear of snapping it off and/or the guts falling into the oil pan. I'm gonna drive it a few days and let the PB work its magic and try again over the weekend. What a saga. Link to comment Share on other sites More sharing options...
mjeff87 Posted May 19, 2021 Author Share Posted May 19, 2021 Link to comment Share on other sites More sharing options...
Pete M Posted May 19, 2021 Share Posted May 19, 2021 does it thread out? or is in more pressed in? Link to comment Share on other sites More sharing options...
mjeff87 Posted May 20, 2021 Author Share Posted May 20, 2021 Its a press fit into a machined hole in the side of the block, with an o-ring midsection that seals it. There's a bolt that holds it snug (you can see it in the pic). I got the bolt out, which was a treat in itself due to the cramped quarters, and thought I had it in the bag from there. How wrong I was. I'm pretty sure that the half can of PB I doused it with will work its magic given couple days...ill give it another shot this weekend. Wife came home and I bagged it for today, we went out to a local place for dinner that has a few different beers on tap. Lol. Link to comment Share on other sites More sharing options...
Pete M Posted May 20, 2021 Share Posted May 20, 2021 I imagine you can find something good with all that choice. there's a place near me that has 2-3 times that on tap. it's nuts. Link to comment Share on other sites More sharing options...
mjeff87 Posted May 22, 2021 Author Share Posted May 22, 2021 Victory is mine.....gotta love PB Blaster and a few days of soak time. Popped right out. Now ill take the factory/original one and source a new oring for it and keep it as a spare. Link to comment Share on other sites More sharing options...
Pete M Posted May 23, 2021 Share Posted May 23, 2021 Link to comment Share on other sites More sharing options...
mjeff87 Posted May 23, 2021 Author Share Posted May 23, 2021 After the last escapade with snapping off the spark plug in the head, I was NOT going to rush this repair. Lol. Link to comment Share on other sites More sharing options...
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