Jkey8195

I would be interested in one for my 88 5spd. Kinda hate not having cruise sense I like to take some longer drives.

Well I bled it last night and now it only fluctuates when it’s fairly cold out like it is in the mornings and if I am moving but at idle with it 65 degrees out it’s sitting here and not moving

I would say roughly 25-35 miles or so and sat and idled multiple times for more than 10 minutes letting the cab warm up before leaving

Well I don’t think I have any leaks I pulled a vacuum on the system to fill it and let it sit for 15 minutes or so and had no signs of the system leaking down, I flushed every part of the cooling system each individually until I had clean water coming out of everything. I personally do not use any rtv on the thermostat housing I only use the paper gasket, and the thermostat is a murray brand and I have not had a issue with them in my other jeeps, not to say that this one isn’t bad out of the box, but I think I’m going to start by cracking the cooling temp sensor and making sure I don’t have a air pocket like suggested above. Also to note the gauge did not fluctuate before I redid the system, which I only did due to previous owner filling system with water only and it was all rusty looking crud in there and the coolant pressure tank had a crack in it, and I was having issues with starting to overheat when sitting at a light and it would be fine as long as I was driving.

Okay will do I’ll try and update this Monday evening after seeing what happens.

I guess I can try that, it’s just hard for me to believe there is any air in it but I know I have seen a lot of people have issues getting these renix systems to bleed properly. I’ll use my lift at work and raise up the back of the truck as high as I can get it and let it get hot then crack the sensor on the back of the head and see what it does

It’s not fast it will creep up to the 210 mark then once it gets there is creeps down to the lower red mark I made in the picture. And it just constantly does that at idle and while driving. I guess I should have also stated it was about 30-40 degrees out today.

Okay so I just replaced everything in my cooling system on my 1988 Comanche 4.0. That includes water pump, 195 thermostat, thermostat housing, pressure tank, heater control valve, and the fan clutch with the Napa grand Cherokee clutch I had seen being recommended. After flushing the whole cooling system, and then install all of those parts and using a vacuum fill I am having a weird fluctuation at my coolant gauge when it gets to operating temperature it fluctuates between these two marks while idling and while driving. Is this normal for a closed cooling system? Thanks for any info.

Dang that is interesting, it says that the truck came with a tach, but I have all gauges except a tach and it drives me crazy because it has a high idle and it’s hard to figure out how high it’s actually idling due to there being a gigantic fuel gauge instead of the tach. Thanks for the build sheet though!

1988 Pioneer 4.0l 5spd long bed 4wd. Just bought this yesterday out of Georgia and it is now home in North Carolina. If you could I would like to get a build sheet on this also, Thanks for this and there is now another Comanche known and on the road

1987 Jeep Comanche. I’m planning on looking at this truck today and would like to see the build sheet, thanks!

97 Cherokee