overheating

[Mhulderman]

I have a new themostat..water pump..hoses and I just put a new from junkyard radiator in my jeep..but it still is overheating??..I'm not loosing any water but it will warm up...cool down...the warm up then slowly get hot...any clue???

 

[dirtybird]

How hot is it getting? Factory thermostat in it will warm up to about 210 normally.

 

[saar]

I just put a new from junkyard radiator in my jeep..but it still is overheating??....any clue???

I think that would explain it...
Radiator is one part the I won't buy from a junk yard.
I bought a used one once (for my alfa, not for my XJ) and had to replace it a month later...
Saar.

 

[Mhulderman]

How hot is it getting? Factory thermostat in it will warm up to about 210 normally.

I put a 165 in it

 

[Bounty__Hunter]

I'd put an OEM thermostat in, 180º I believe, and make sure you have all the air out of the system. I believe this involves parking with the front of the Jeep slightly down hill and removing the temp sensor from the rear of the head.

A leaking overflow bottle can also lead to overheating in the Renix Jeeps.

 

[komandro]

You did the major things but did u try to check the two cooling fans?
They could be one of the reasons for the overheating.

To check the fan is very easy just when the car is off try to rotate it by ur hand, if it is rotating smoothely it mean the fan is not working fine but if it is rotating hard then it should be ok.

Also , the follwing things could cause overheating in the car ,
1 - low level of oil could cause this problem.
2 - Air filter if dirty , it cause this problem.
3 - Radioator top cap is very critical, it should automatically release when the pressure reach 90 kpa , double check the seal in the cap and press the spring in the cover and check how easy it is .