mxracer624
NAXJA Forum User
- Location
- Hemet ca,
well once again i think i just was want to park my jeep in the garage and forget about it.. i have a 89 xj 4.0 auto with a closed system. I have replaced EVERYTHING possible in the last 2 months...
Brand New head gasket
Brand New pressure bottle
Brand new hd fan clutch
Brand new water pump
Brand new CSF 3 core radiator with brand new upper and lower hoses
70/30 mixture
i have burped the system by parking nose down, taking out the temp sending unit and filling pressure bottle until no more air escapes from the head.
Tstat was removed until i find the overheating problem so i can eliminated that as the prob.
And ive wired my efan to a switch
Ok so heres whats going on. My jeep would around 220-225 so i would replace one thing at a time.. after id replace something like the fan clutch it would work for a few days then start overheating again.. then i replaced the waterpump it worked for a few days then start overheating and so on and so on for everything ive replaced. well my last thing i replaced was the radiator. I thought for sure since this was the last thing i could possibly replace it must be the prob after all of the hassle. Sure enough i installed it, and it ran perfect.. It actually ran very cold because i still didnt put the tstat in it. But i would drive it around town, in traffic, up some USNF control roads in 90 degree weather and it would stay solid at like 160. i wouldnt even have to turn my fan on. it ran like this for about 3 days. Well i was just about ready to put a tstat in because i thought i figured out the prob. Until today. I decided to take it out and cruise up a control road everything was at 160 till about half way and then out of nowhere it started creeping to 210 then 215 the 225ish with the fan on. So i stopped and checked everything.. the only thing i found was there was a faint hissing sound (like air escaping) from the top of the water pump/bottom of the tstat housing/ head and block area. i couldnt pinpoint where it was coming from. I had the same problem before i installed the radiator and after i installed the water pump so when i installed the rad i pulled the water pump and put on a new gasket and resealed it very well. I dont think its the tstat housing cause i havent touched it and it wasnt doing it before.. so i let it cool down then started driving again.. and sure enough about 10 mins later same thing around 220. so i pulled over, let it cool then continued.. this time it didnt get to 220 but it got to about 190 which isnt bad at all and it stayed that way till we got to the top. we ate lunch and headed back down the mountain. On the way back the temp didnt even get past 150ish the whole way. my head has been hurting soo bad trying to think of what the problem is. This much thinking from me is dangerous, so im asking for anyone elses advice! please help me out before i roll this jeep off a cliff and it becomes a nice new rabbit shelter! thanks!
Brand New head gasket
Brand New pressure bottle
Brand new hd fan clutch
Brand new water pump
Brand new CSF 3 core radiator with brand new upper and lower hoses
70/30 mixture
i have burped the system by parking nose down, taking out the temp sending unit and filling pressure bottle until no more air escapes from the head.
Tstat was removed until i find the overheating problem so i can eliminated that as the prob.
And ive wired my efan to a switch
Ok so heres whats going on. My jeep would around 220-225 so i would replace one thing at a time.. after id replace something like the fan clutch it would work for a few days then start overheating again.. then i replaced the waterpump it worked for a few days then start overheating and so on and so on for everything ive replaced. well my last thing i replaced was the radiator. I thought for sure since this was the last thing i could possibly replace it must be the prob after all of the hassle. Sure enough i installed it, and it ran perfect.. It actually ran very cold because i still didnt put the tstat in it. But i would drive it around town, in traffic, up some USNF control roads in 90 degree weather and it would stay solid at like 160. i wouldnt even have to turn my fan on. it ran like this for about 3 days. Well i was just about ready to put a tstat in because i thought i figured out the prob. Until today. I decided to take it out and cruise up a control road everything was at 160 till about half way and then out of nowhere it started creeping to 210 then 215 the 225ish with the fan on. So i stopped and checked everything.. the only thing i found was there was a faint hissing sound (like air escaping) from the top of the water pump/bottom of the tstat housing/ head and block area. i couldnt pinpoint where it was coming from. I had the same problem before i installed the radiator and after i installed the water pump so when i installed the rad i pulled the water pump and put on a new gasket and resealed it very well. I dont think its the tstat housing cause i havent touched it and it wasnt doing it before.. so i let it cool down then started driving again.. and sure enough about 10 mins later same thing around 220. so i pulled over, let it cool then continued.. this time it didnt get to 220 but it got to about 190 which isnt bad at all and it stayed that way till we got to the top. we ate lunch and headed back down the mountain. On the way back the temp didnt even get past 150ish the whole way. my head has been hurting soo bad trying to think of what the problem is. This much thinking from me is dangerous, so im asking for anyone elses advice! please help me out before i roll this jeep off a cliff and it becomes a nice new rabbit shelter! thanks!