MongoXJ
NAXJA Forum User
- Location
- San Diego, CA
I am sure you guys are getting sick of these posts/issues, and I did a good amount of searching and some relevant tests (though some were unclear what to look for) I am taking the truck out to the desert monday and its getting pretty hot so I want to bust this issue (of course I work 12 hours saturday and sunday so only simple solutions will work)
This all started suddenly tonight, after helping a freind tow his new trailer. While towing I noticed I was running hoter than normal, I usually sit around 195-200, and once I was towing the trailer home I was up to 210-220 on the freeway. Then after letting the truck sit for quite a while when driving around on the street I noticed it was getting pretty damn hot even with out the added loads.
Typical Issue, over heating while at an idle. I have a 95 Sport with open cooling system, 4.0L engine. I bought the truck a bit over a year ago, and have not touched any components on the system up to this point, so I am not sure what is stock and what has been replaced in the 140k miles on it.
Things I have checked.
Clutch Fan - I got the engine nice and hot and when I try to spin the blade it barely moves 1 blade over. When cool I can get it to do about a 1/4 turn. I reved the engine once it was heated up and there was no difference in the cooling power of the fan, weather I was at 1500rpm or 2500+rpm This leads me to beleive my Clutch Fan is working fine and doing its job, so the issue must lie somewhere else.
Heating - I have run the heat and it will come out quite hot, and cool the engine down pretty quickly
Aux Fan - This is working fine, once it kicks in the temp drops pretty fast. Aux Fan + Heat = really quick cool down to normal temps.
Coolant - When I first noticed the issue I checked inside and the coolant was at the add level and looked a bit dirty. I bought some 50/50 at the gas station I was stopped at and filled it up to the full mark, while the engine was still hot (I will check tommorow when the engine is cold to see where its at) Im hoping I didnt have it low enough to suck air into the system and its having an issue burping its self.
From what I have been able to find this leads me to think its one of the following issues.
1. Radiator Cap has gone south and isnt burping the system so I have air in it now.
2. Water Pump is dying and cant move fluid well enough.
3. Radiator has crap in it/needs to be replaced.
Of these things (I may be missing some other options) Im not sure which ones would suddenly manifest them selves in a matter of hours. Im not sure if this could be a t-stat issue either.
So any help diagnosing the issues would be appriciated!
This all started suddenly tonight, after helping a freind tow his new trailer. While towing I noticed I was running hoter than normal, I usually sit around 195-200, and once I was towing the trailer home I was up to 210-220 on the freeway. Then after letting the truck sit for quite a while when driving around on the street I noticed it was getting pretty damn hot even with out the added loads.
Typical Issue, over heating while at an idle. I have a 95 Sport with open cooling system, 4.0L engine. I bought the truck a bit over a year ago, and have not touched any components on the system up to this point, so I am not sure what is stock and what has been replaced in the 140k miles on it.
Things I have checked.
Clutch Fan - I got the engine nice and hot and when I try to spin the blade it barely moves 1 blade over. When cool I can get it to do about a 1/4 turn. I reved the engine once it was heated up and there was no difference in the cooling power of the fan, weather I was at 1500rpm or 2500+rpm This leads me to beleive my Clutch Fan is working fine and doing its job, so the issue must lie somewhere else.
Heating - I have run the heat and it will come out quite hot, and cool the engine down pretty quickly
Aux Fan - This is working fine, once it kicks in the temp drops pretty fast. Aux Fan + Heat = really quick cool down to normal temps.
Coolant - When I first noticed the issue I checked inside and the coolant was at the add level and looked a bit dirty. I bought some 50/50 at the gas station I was stopped at and filled it up to the full mark, while the engine was still hot (I will check tommorow when the engine is cold to see where its at) Im hoping I didnt have it low enough to suck air into the system and its having an issue burping its self.
From what I have been able to find this leads me to think its one of the following issues.
1. Radiator Cap has gone south and isnt burping the system so I have air in it now.
2. Water Pump is dying and cant move fluid well enough.
3. Radiator has crap in it/needs to be replaced.
Of these things (I may be missing some other options) Im not sure which ones would suddenly manifest them selves in a matter of hours. Im not sure if this could be a t-stat issue either.
So any help diagnosing the issues would be appriciated!