The Mud Pit > Wrenching
XJ was Overheating
kirksjeep:
--- Quote from: PaulW on July 31, 2009, 01:42:46 AM ---check the radiator itself.
--- End quote ---
The radiator has been replaced at some point. I can tell it's not the OEM one, and doesn't look that old. The water pump has also been replaced at some point. I have heard that the fan clutch can go bad and cause problems at highway speeds, so I'm going to keep an eye on that. I drained the radiator since I had added so much water and the coolant came out a light brown color. I didn't expect it to look nice and green, but I also didn't expect it to look as bad as it did since I had just drained the radiator and refilled it a few weeks ago.
If it happens again, I think I might flush the system in-case there is a blockage some where. I'll also change out the fan clutch, I hear they are only like $40 and hard to diagnose as the problem, but it happens enough to make it worth it. I have used the prestone radiator flush system that taps into the heater hose, but do you think I should use the radiator flush chemical?
PaulW:
--- Quote from: kirksjeep on July 31, 2009, 03:12:05 AM ---
--- Quote from: PaulW on July 31, 2009, 01:42:46 AM ---check the radiator itself.
--- End quote ---
The radiator has been replaced at some point. I can tell it's not the OEM one, and doesn't look that old. The water pump has also been replaced at some point. I have heard that the fan clutch can go bad and cause problems at highway speeds, so I'm going to keep an eye on that. I drained the radiator since I had added so much water and the coolant came out a light brown color. I didn't expect it to look nice and green, but I also didn't expect it to look as bad as it did since I had just drained the radiator and refilled it a few weeks ago.
If it happens again, I think I might flush the system in-case there is a blockage some where. I'll also change out the fan clutch, I hear they are only like $40 and hard to diagnose as the problem, but it happens enough to make it worth it. I have used the prestone radiator flush system that taps into the heater hose, but do you think I should use the radiator flush chemical?
--- End quote ---
If the water that came out looked like rust, then I would absolutly use the flush chemical. put it it the cooling system and run the truck for a good 15 miles to get it nice and hot. then let it cool down and go to town with the garden hose. it will help in the long run to get all of that poop out of your cooling system. check to see if you have a block drain also. all of the"debris" inside the cooling system usually sits inside the block.
kirksjeep:
As I walked by the bucket of old coolant this morning, it looked more orange than rusty and that when I remebered I added Orange coolant instead of green after the cap blew off. I didn't find any rust or debris at the bottom of the bucket, so I am guessing it is ok.
PaulW:
--- Quote from: kirksjeep on July 31, 2009, 09:31:02 PM ---As I walked by the bucket of old coolant this morning, it looked more orange than rusty and that when I remebered I added Orange coolant instead of green after the cap blew off. I didn't find any rust or debris at the bottom of the bucket, so I am guessing it is ok.
--- End quote ---
good to know. the other thing i would check for is a head gasket concern then. you can get a block tester cheap at almost any auto parts store. it goes into the radiator and detects exhaust gasses through a chemical process. it's worth trying just to make sure you really don't have a big problem.
kirksjeep:
--- Quote from: PaulW on July 31, 2009, 10:36:42 PM ---
--- Quote from: kirksjeep on July 31, 2009, 09:31:02 PM ---As I walked by the bucket of old coolant this morning, it looked more orange than rusty and that when I remebered I added Orange coolant instead of green after the cap blew off. I didn't find any rust or debris at the bottom of the bucket, so I am guessing it is ok.
--- End quote ---
good to know. the other thing i would check for is a head gasket concern then. you can get a block tester cheap at almost any auto parts store. it goes into the radiator and detects exhaust gasses through a chemical process. it's worth trying just to make sure you really don't have a big problem.
--- End quote ---
If I have any more problems I'll look into that. The 00-06 heads are know for cracking between the 3rd and 4th cyclinders, so I have been checking for the normal signs. The 2000 are the worst by far and have something like a 85% failure rate. The other years are all less then 10%.
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