Cooling fan always on?
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
you could try a radiator cooling system flush, or maybe your clutch fan is bad
to check the clutch fan open the hood and spin the blades by hand (with the engine OFF), it whould stop relatively quickly, but if it spins all the way around more than once its bad and the clutch needs to be replaced, try those and get back to us
to check the clutch fan open the hood and spin the blades by hand (with the engine OFF), it whould stop relatively quickly, but if it spins all the way around more than once its bad and the clutch needs to be replaced, try those and get back to us
Champion
Joined: Jun 2006
Posts: 4,822
Likes: 4
From: Indiana
If the clutch fan is fine...
flush the radiator, replace the stat with a 180 version, replace the upper rad hose, add new Prestone 50/50 premix and a bottle of redline waterwetter. Make sure the system is full of coolant and you should be set. Should run you less than $85 total and about 90 minutes. I could do it in 30 including the flush having done it before and being familiar with the swap, etc.
IndyDurango
flush the radiator, replace the stat with a 180 version, replace the upper rad hose, add new Prestone 50/50 premix and a bottle of redline waterwetter. Make sure the system is full of coolant and you should be set. Should run you less than $85 total and about 90 minutes. I could do it in 30 including the flush having done it before and being familiar with the swap, etc.
IndyDurango
TGion,
Can you give us some more info to go by. so far you only stated you did the radiator flush. Another key issue, you replaced your tranny 10k miles ago. Did you get your radiator replaced or did the tranmission shop flushed the transmission cooler within your radiator really good? Normally it is recommended to replace the radiator when you replace/rebuild your tranny because it failed. The OEM radiators have the tranny cooler built in and the cooler may get clogged up and affect your new rebuilt tranny.
Most common issues to overheating on the Durangos can be the bad thermostat, your front A/C coil and/or radiator may be partially clogged so not enough airflow will pass thru. A good power washing on your a/c coil and radiator from a car wash will fix this.
If the above does not fix the overheating, you may need to inspect the water pump and clutch fan to make sure both of these are working fine as well. Since you have the R/T, you should have an assisted electric fan that comes on to assist in additional cooling. You may need to check both the top and bottom radiator hoses. If the hose become too soft over time, it can collapse causing constriction flow.
If everything checks above, then lastly, you may need to replace the radiator.
More FYI, if your R/T durango reaches the 210 degree mark, you will notice your performance and driving of the R/T will be degraded. This is normal as the PCM tells the R/T to drive in limp mode in order to preserve the engine from damage when it is starting to overheat.
Can you give us some more info to go by. so far you only stated you did the radiator flush. Another key issue, you replaced your tranny 10k miles ago. Did you get your radiator replaced or did the tranmission shop flushed the transmission cooler within your radiator really good? Normally it is recommended to replace the radiator when you replace/rebuild your tranny because it failed. The OEM radiators have the tranny cooler built in and the cooler may get clogged up and affect your new rebuilt tranny.
Most common issues to overheating on the Durangos can be the bad thermostat, your front A/C coil and/or radiator may be partially clogged so not enough airflow will pass thru. A good power washing on your a/c coil and radiator from a car wash will fix this.
If the above does not fix the overheating, you may need to inspect the water pump and clutch fan to make sure both of these are working fine as well. Since you have the R/T, you should have an assisted electric fan that comes on to assist in additional cooling. You may need to check both the top and bottom radiator hoses. If the hose become too soft over time, it can collapse causing constriction flow.
If everything checks above, then lastly, you may need to replace the radiator.
More FYI, if your R/T durango reaches the 210 degree mark, you will notice your performance and driving of the R/T will be degraded. This is normal as the PCM tells the R/T to drive in limp mode in order to preserve the engine from damage when it is starting to overheat.
Last edited by Kensai; Apr 27, 2009 at 01:00 AM.
