Yes.

Here is the Renix pressure bottle.

This is total curiosity on my part -

So the pressure bottle on a Renix Jeep serves as the overflow AND pressure cap? What's the difference between a closed system and an open, is it simply that the open system has an "overflow" whereas the closed is a sort of "expansion tank"? I'm sure I could google it.. lol.

EZEarl suggested converting to an open system. What is involved with this, is it as simple as swapping out the radiator and expansion tank? Do the hoses match up or would you be screwing around trying to find hoses?

I get the impression that the OP is not (yet) very mechanically inclined (my apologies if I'm wrong - no offense is intended, just my impression. If I'm right, it's never too late to learn. Basically - don't be put off either way. ), so is that something that would be "easy" to do?

Renix system is closed. To convert to open system, get a NAPA NR2802 radiator and a coolant recovery bottle.

No offense taken. I am somewhat mechanically inclined (just a little) but, have not had to work on anything in years.

I am more than willing to converting to an open system but have never done anything like that. More than willing to learn, though.
Yesterday, I checked tire pressure on the Cherokee. About 20 PSI, all around. Spare was even worse. Maybe that had something to do with my poor fuel mileage.

Greetings!

BleepinJeep did a video detailing a conversion from a closed to open cooling system (3 parts). I have no personal experience in this area, just thought you might appreciate seeing it.

Yes! Thank you much.

It's super easy to do.

What is the disadvantage of a closed system?
Mine is closed, seems to work ok.

They work fine.

The problem is the poor quality of the replacement pressure bottles. They rarely last more than a year, and when they fail, there is a catastrophic loss of coolant.

Ok, thank you for the answer.
Cruiser, I wished you lived alot closer, I could use your expertise on my 88.

I'm a mouse click away....

Have you visited my website?

Hahahaha, you guys answered the next question I had before I had a chance to ask it!

I was recently accused of inflating cruiser's ego - As far as I'm concerned as long as we can draw on his vast knowledge and expertise his ego can be as big as he wants!

Yeah, like out here in Northern California wine country.

BTW, Any know where the fuse box is on an "89? My dome lights are out and I don't have a manual yet.

I can see there are lots of things I will have to pick up over the next few months.

Grab a flashlight and lay on your drivers (I think) side floor and you should see it towards the door side.