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Old 10-20-2013, 04:40 PM
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Overheats when throttle down or idling.???

We just got back from a camping trip pulling the rv, when i come to a stop the temp jumps up to 250 in a matter of 60-90 secs. Start driving, fan is on and drops to 200 in less than 30 secs. This jump seems to me to be rather quick and maybe its just a sensor, engine does not feel real hot. I am using my dashboss to watch temps. Dumped alot of coolant on the trip too. What would cause a 6.0 to overheat sitting still for 1 minute after a good pull????

Thanks gb
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Old 10-20-2013, 06:12 PM
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Quote:
Originally Posted by gblauf View Post
We just got back from a camping trip pulling the rv, when i come to a stop the temp jumps up to 250 in a matter of 60-90 secs. Start driving, fan is on and drops to 200 in less than 30 secs. This jump seems to me to be rather quick and maybe its just a sensor, engine does not feel real hot. I am using my dashboss to watch temps. Dumped alot of coolant on the trip too. What would cause a 6.0 to overheat sitting still for 1 minute after a good pull????

Thanks gb
Water pump. I bet you have a broken impeller (OEM ones are plastic). Good time to switch to a BPD water pump!
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Old 10-21-2013, 11:37 AM
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Waterpump, Low coolant or thermostat. In my excursion I would reach 225 degrees idling. Once I started driving the fan would be loud then the temps would drop to normal range in about 60 seconds. Turned out my heater hoses were leaking coolant causing it to go low

Sent from my Nexus 7
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Old 10-21-2013, 11:54 AM
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Water pump for sure. Replace it with a BPD water pump.
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Old 10-21-2013, 11:57 AM
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Wink

This morning she wont get hotter than 160. I think thermostat is bad. I dont how that woukd cause overheating when towing?? Maybe t stat and water pump. I try t stat tonight.
Gb
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Old 10-21-2013, 12:01 PM
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With that said I'd bet it's the thermostat. It restricts flow out of the radiator so it will have a longer time to cool before exiting the radiator. Try that first. But go back with OEM.
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Old 10-21-2013, 06:30 PM
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Just poped out the tstat, she was closed, opened right up in a pot of boiling water. So that aint the problem. What would cause these motors to run so cool with the tstat working???? Could not break 180 today in 85 degree weather. EOT is staying cold too.

Gb
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Old 10-21-2013, 06:33 PM
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Disregaurd lol
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