If you want to do a class act job, replace Thermostat (to OEM Specs), flush and fill radiator, and put in a new waterpump. I have a 92' and my water pump went out a while ago and it was catastrauphic! the water pumps are about $40, thermos-$3, and coolant-$15

 

Yeah it was quite a load but only a few miles. Took it easy. Xj pulled it no prob.

 

How'd it stop? LOL

 

Advance auto gave me a 13lb radiator cap for my rig. 16lb in it now. Am i good or do i need another 16lb?

 

The van brakes. Jeep didn't stand a chance of stopping it!!! Hillbilly towjob. 4 miles w/ recovery strap.

 

BTW djb, really appreciate the help man!

 

Any thoughts???

 

I'd think u would be ok with a 13lb.....boiling point is probably lowered less than 10 degrees F (50/50 mix). I've run a 7lb cap, less pressure, less chance of a leak but not advised. Remember, the XJ rad is really dinky, the entire cooling system must be in tip top shape, especially for the upcoming summer months.

 

Thx again for your help. Greatly appreciated!!!

 

if your going to flush it out you might as well put a new t stat in it theyre like 10 bucks, also if it gets hot at speed and cools down when you stop like mine was doing it might be your fan clutch on the mechanical fan.

check the relay to make sure your e fan is coming on also. if its a renix set up then the t stat will be near the air box on the drivers side fender under the hood.

 

With a properly functioning cooling system, it's usually the other way around. At speed there's plenty of air moving thru the rad and fan(s) aren't needed......when moving slow is when u need the fan(s).

 

when moving slow the mechanical fan isnt pulling as much air

i asked that because thats what happned to me with a new radiator.

 

It may be spinning slower but that's when the clutch is engaged and really grabbing air......at higher speed, it's free-wheeling, grabbing very little air because lots of air moves thru the rad at speed. Again, that's the way a properly functioning cooling system USUALLY performs, YRMV.

 

Sandad, did flush and tstat and rad cap. But originally, rig was getting hot at higher speeds then seeming to cool down at idle. O.o
So should i check out the fans? Mech fan is the one on engine run by belts and e fan is the one mounted to rad and comes on with tstat right???? Just makin sure what u r referring to as i am ignorant to some of his still!!!

 

BTW-its running much cooler than in pics earlier in thread. Just want to be thourough.