coyote121403

The coolant is probably running down the hose and block from the thermostat housing. Mine did that which is why I said to check it. Also a lower temp thermostat might be a good idea. Flushing as mentioned above is good but I had my cooling system flushed really good proffesionally and it still runs just over 210... Get the new thermostat and a junk yard Audi twin fan..

evmo

Any recommendations on a thermostat? My jeeps has run at a hair above 210 for years now so I'm not sure If flushing will fix it although I will probably go ahead and flush the system anyway.

Got a write up for installing the Audi fan you mentioned or is it pretty much a no-brainer?

evmo

I didn't see any leakage around mine, is there something specific I should be looking for? A picture would be golden...

coyote121403

the OEM thermostat is a 195, you can go down to a 160 or try a 180. I'm gonna put the 160 in mine until winter and see how it does. For the audi fan you might be able to find a write up somewhere on here but I think its pretty simple.

evmo

Awsome! Thanks for the info ...now off to Napa...

Mike1998XJ

So you bought the Jeep with 48,000 miles on it, you said it has always run a hair over 210 on the 100,000 miles you have driven it. It is still running a hair over 210, it has a small coolant leak and you want to replace it with a lower thermostat to fix what? To lower the 210 it has been running at for 100,00 miles? Or install an Audi fan? To fix what?
Why don't you fix the leak and call it good? At this point of the game installing a lower thermostat is riduculous. Install the 195 and drive it for another 100k. Installing an Audi fan is totally unnecessary... Have you checked the coolant temperature to make sure your gage is correct? Shoot the inlet and outlet hoses with an IR gage. Test the thermostat... Don't go down the path you are taking!
Think about the advice you have been given before acting! Does it make sense? It does not to me! Find the Leak!!!! and fix it!!!
Mike

evmo

Well the thinking goes something like this: Leak has been found, at least A leak has been found. If I'm going replace the gasket anyway then I may as well put in a new thermostat since the one that's on there is stock as far as I know. I'd rather replace it now while I'm in there rather than have it crap out on a trail somewhere.

I should have clarified the over 210 thing. Its done that for several years now, when I first bought it it never broke 210.

I don't have one of thermometors your talking about but a new thermostat is dirt cheap. I see no harm in going with a 180 instead of the stock 195 especially since the places I go tend to be pretty hot. The coolant flush is something that also should be done considering its been about 5 years since I did it last.

The Audi thing is more of a curiosity than anything else. Lets face it modding stuff is fun!

Mike1998XJ

Running a 180 stat usually puts you right on the edge of running too cool. If you don't get up to the proper operating temp the computer will stay in closed loop mode. That's the mode it's in when you first start it when cold. The computer makes it run rich when first started. If it never hits the propoer operating temp it will stay in closed loop mode all the time. It won't go into open loop where the O2 sensors are feeding back into the computer. You will burn more fuel, you will dump more raw fuel into your exhaust system and the cat thus lowering the life of it. Some people get lucky with the 180 stats and they run ok, others run into what I described. Check your mileage before and after so you can see how much money it will cost you in the long run for the 180 stat...
Then maybe a flush and returning your system to it's original state as designed by Engineers who may know a little more than your average goat, won't look so bad...
Good Luck

coyote121403

I agree with both. Running just over 210 isn't that big of a deal. The reason I'm going with the 160 and new fan is because I live in Denver and one trip up I-70 into the mountains and just over 210 turns into red city. (plus mine dies when it gets over 210 but thats another thread) I'm sure it will still get hot but will be enough buffer to get to that downgrade without going into the red. (I'm also pulling a 18' sea ray). In agreement with Mike, replacing the old gummed up 195 with a fresh one and a coolant flush might put you right on the money... Your jeep, have fun!

evmo

Well here’s an update on the situation.

I replaced the gasket and the stat, flushed the system and now she seems to be running at a steady 200. The weathers been mild and I haven’t really stressed the motor much so I think things will work out for me in that regard.

Now the problem, I’m still seeing a trace of coolant on top of the water pump. A leak still seems to be there somewhere albeit not nearly as bad. Now there just seems to be a few random drops of coolant on the ground, none on the exhaust and I’m not smelling coolant all the time anymore.

This leads me to three possibilities:

1. I screwed up and installed the gasket improperly (Least likely, simple job, took my time and made sure I did it right.)

2. Gasket is faulty. I called several places around my area and only one parts store had one in stock so I bought it. It was light blue and had an adhesive backing on one side, not sure of the brand. I see that some of you mentioned not getting the basic one so maybe that’s what I ended up with.

3. Both water pump and stat housing were leaking. Fixing one helped the problem and now I need to do the pump as well.

Sucks cause I’m at my girlfriends for the weekend, don’t have my tools and her landlord freaks out if someone looks like their working on a vehicle in the complex. It looks like it’s going to have to wait until early next week till I can investigate further.

Mike1998XJ

Is the coolant coming out of the weep hole on the water pump? That means the pump is toast if it is.
Congratulations on the rest of the job! You have fixed your Cherokee properly! I'm glad you didn't go with the lower stat. There is no need for that on a properly running cooling system.
Mike

TEE_95JEEP

Does anyone know what the nut or bolthead(cant remember what it is exactly) is above the engine block drain plug? It has an oversized washer underneath it. My coolant is leaking from there and was wondering if anyone could help me figure out why and how to fix. My jeep has been overheating and I figured out thats where the leak is coming from. Thanks.

Mike1998XJ

Are you looking on the Drivers side? There is a freeze plug above the drain for the block on mine???

TEE_95JEEP

yes its the drivers side that i;m talking about. it looks like there are two of them. it's leaking out of the front one.

Mike1998XJ

I'm looking at my 1998 block and I don't see anything other than the drain plug that would leak. Can you take a picture? Maybe someone else can help us. If it's overheating and the coolant level is ok, you have more issues than that. Is it leaking enough coolant where it is getting low then overheating?