Cherokee over heats after replacing everything!!
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Cherokee over heats after replacing everything!!
Hi, I have a 2001 cherokee sport edition. At idle it sits right below 210. But if you drive it up hills or put any strain on the engine it Climbs to about 225. I just replaced head gasket, head, 2 core radiator, water pump, radiator hoses, radiator cap, and even after all this it is still getting hot. Yesterday I drove it home after school and it got to about 220 and i went inside and came back out and there was a puddle of coolant under it. It is really frustrating me, I can't figure it out. please help
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
225 not really overheating. Have the system pressure checked dont forget the cap. Nothing cools better than stock set up. Were the fan installed by you or there when bought ?
Last edited by freegdr; 10-09-2016 at 06:28 AM.
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Year: 1998
Model: Cherokee (XJ)
Engine: 4.0L
i often find that the overflow hose will leak if it's not clamped to the radiator, you wouldn't notice this during a pressure test because that hose is eliminated during the test. what triggers the fans? 225 is still within the realm of reasonable albeit at the upper end of it. do the fans ever trigger at idle?
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Year: 1994
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Where are you getting the temp readings from? A stock in dash gauge? Independent aftermarket gauge? Handheld temp gun? You are right at the threshold for what would be considered overheating. Stock fans don't kick on until somewhere around 215*. With temps reaching 220-225* on a regular basis. One thing not yet mentioned is to check the specific gravity of the coolant you are running. Poor coolant concentration can really add to an overheat condition.
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Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
What you describe sorta sounds like a head issue. You sure you got everything buttoned down and sealed up properly? You sure the block and head surfaces mated up properly? You might want to test for a leaking head gasket.
One thing to consider is that the water jackets may be full of crud, especially if you swapped the head because of a cracked 0331 that was causing overheating. It might help to run Prestone flush or Amway laundry detergent through it to flush out any packed in crap that didn't get flushed out when you replaced the other components.
Also, are you certain your aftermarket fans are blowing the right direction?
He has a 2001. In 2000 and 2001 XJs, the electric fan does not come on until the coolant temperature reaches 221° F. Then it stays on until the temp drops to 217°. This is a change from prior years to allow the motor to run a little hotter for emissions purposes.
That may not make any difference, however, since he has swapped out the stock fans for a setup that could be contributing to the problem just as easily as the solution. Personally I would start by verifying the temp with an IR thermometer pointed at the thermostat housing. If it turned out to really be running hot, I would take the fans back to stock to rule out the aftermarket fans as a problem. Then I would troubleshoot the stock system until the actual problem was found and fixed.
One thing to consider is that the water jackets may be full of crud, especially if you swapped the head because of a cracked 0331 that was causing overheating. It might help to run Prestone flush or Amway laundry detergent through it to flush out any packed in crap that didn't get flushed out when you replaced the other components.
Also, are you certain your aftermarket fans are blowing the right direction?
He has a 2001. In 2000 and 2001 XJs, the electric fan does not come on until the coolant temperature reaches 221° F. Then it stays on until the temp drops to 217°. This is a change from prior years to allow the motor to run a little hotter for emissions purposes.
That may not make any difference, however, since he has swapped out the stock fans for a setup that could be contributing to the problem just as easily as the solution. Personally I would start by verifying the temp with an IR thermometer pointed at the thermostat housing. If it turned out to really be running hot, I would take the fans back to stock to rule out the aftermarket fans as a problem. Then I would troubleshoot the stock system until the actual problem was found and fixed.
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Where are you getting the temp readings from? A stock in dash gauge? Independent aftermarket gauge? Handheld temp gun? You are right at the threshold for what would be considered overheating. Stock fans don't kick on until somewhere around 215*. With temps reaching 220-225* on a regular basis. One thing not yet mentioned is to check the specific gravity of the coolant you are running. Poor coolant concentration can really add to an overheat condition.
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i often find that the overflow hose will leak if it's not clamped to the radiator, you wouldn't notice this during a pressure test because that hose is eliminated during the test. what triggers the fans? 225 is still within the realm of reasonable albeit at the upper end of it. do the fans ever trigger at idle?
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What you describe sorta sounds like a head issue. You sure you got everything buttoned down and sealed up properly? You sure the block and head surfaces mated up properly? You might want to test for a leaking head gasket.
One thing to consider is that the water jackets may be full of crud, especially if you swapped the head because of a cracked 0331 that was causing overheating. It might help to run Prestone flush or Amway laundry detergent through it to flush out any packed in crap that didn't get flushed out when you replaced the other components.
Also, are you certain your aftermarket fans are blowing the right direction?
He has a 2001. In 2000 and 2001 XJs, the electric fan does not come on until the coolant temperature reaches 221° F. Then it stays on until the temp drops to 217°. This is a change from prior years to allow the motor to run a little hotter for emissions purposes.
That may not make any difference, however, since he has swapped out the stock fans for a setup that could be contributing to the problem just as easily as the solution. Personally I would start by verifying the temp with an IR thermometer pointed at the thermostat housing. If it turned out to really be running hot, I would take the fans back to stock to rule out the aftermarket fans as a problem. Then I would troubleshoot the stock system until the actual problem was found and fixed.
One thing to consider is that the water jackets may be full of crud, especially if you swapped the head because of a cracked 0331 that was causing overheating. It might help to run Prestone flush or Amway laundry detergent through it to flush out any packed in crap that didn't get flushed out when you replaced the other components.
Also, are you certain your aftermarket fans are blowing the right direction?
He has a 2001. In 2000 and 2001 XJs, the electric fan does not come on until the coolant temperature reaches 221° F. Then it stays on until the temp drops to 217°. This is a change from prior years to allow the motor to run a little hotter for emissions purposes.
That may not make any difference, however, since he has swapped out the stock fans for a setup that could be contributing to the problem just as easily as the solution. Personally I would start by verifying the temp with an IR thermometer pointed at the thermostat housing. If it turned out to really be running hot, I would take the fans back to stock to rule out the aftermarket fans as a problem. Then I would troubleshoot the stock system until the actual problem was found and fixed.
Last edited by cherokeeone; 10-09-2016 at 02:04 PM.
#14
I used a (Block Tester ) from NAPA, $42. Basically you lower fluid level in radiator and use hand pump to pull vapors from radiator up through test liquid. If liquid turns green/yellow you have compression gasses in coolant system. Blown head gasket
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