Hello,
New member here. Here is the deal
I bought a Rubicon 2008 model, new. Been the biggest pos I've ever owned and I've put 400k on a couple vehicles. Goes great. Not abused. Just a hunting and wheeling toy I always wanted. Used to go to Tellico. But ive kept everything fixed until now. Jeep has 54k miles.
The other day the jeep got warm idling and started blowing out cold air. Never got hot I shut it down. checked coolant was a quart low but overflow tank was full (factory coolant. Was replaced when I put a stick into the radiator a few years ago. All factory parts. And fluid) . I put my burping funnel in and filled it and when it got to 195 (I had my computer hooked to it to watch and see if the thermostat was working). Fan never came on. I had assumed head gasket for a while( or maybe I thought it got warm and warped subconsciously) but leakdown test showed less than 2% on every cylinder. Block test shows no combustion gas in cooling system. I put dye in the system everything was fine. So maybe it just got warm. I put my launch computer on it and wasn't satisfied with the coolant temp voltage reading, voltage was jumping a bit oddly so I ordered a factory thermostat, coolant temp sensor,and radiator cap. I'll assume everything is good there now. Normally I wouldn't have done all that yet but this jeep has been terrible I assumed the worst. Plus the cooling system has worked hard. Probably half that 54k was in low range. Most everything else was fixed by the dodge place under warranty up until 2018. I replaced the cap because the system was low and didn't pull any from the tank. Line is clear, I blew through it. Coolant looked fine.
Unfortunately the fan still won't come on. So what else tells the fan to come on other than the coolant sensor beside the water neck. The fan is fine. I can cycle it via my computer, or I can hit the ac button and the fan comes on. But no matter how hot I let the jeep get, the computer never changed the desired fan state to low or hi. Just stays off. The jeep knows the correct temp
Thanks to anyone who knows this particular cooling system.
New member here. Here is the deal
I bought a Rubicon 2008 model, new. Been the biggest pos I've ever owned and I've put 400k on a couple vehicles. Goes great. Not abused. Just a hunting and wheeling toy I always wanted. Used to go to Tellico. But ive kept everything fixed until now. Jeep has 54k miles.
The other day the jeep got warm idling and started blowing out cold air. Never got hot I shut it down. checked coolant was a quart low but overflow tank was full (factory coolant. Was replaced when I put a stick into the radiator a few years ago. All factory parts. And fluid) . I put my burping funnel in and filled it and when it got to 195 (I had my computer hooked to it to watch and see if the thermostat was working). Fan never came on. I had assumed head gasket for a while( or maybe I thought it got warm and warped subconsciously) but leakdown test showed less than 2% on every cylinder. Block test shows no combustion gas in cooling system. I put dye in the system everything was fine. So maybe it just got warm. I put my launch computer on it and wasn't satisfied with the coolant temp voltage reading, voltage was jumping a bit oddly so I ordered a factory thermostat, coolant temp sensor,and radiator cap. I'll assume everything is good there now. Normally I wouldn't have done all that yet but this jeep has been terrible I assumed the worst. Plus the cooling system has worked hard. Probably half that 54k was in low range. Most everything else was fixed by the dodge place under warranty up until 2018. I replaced the cap because the system was low and didn't pull any from the tank. Line is clear, I blew through it. Coolant looked fine.
Unfortunately the fan still won't come on. So what else tells the fan to come on other than the coolant sensor beside the water neck. The fan is fine. I can cycle it via my computer, or I can hit the ac button and the fan comes on. But no matter how hot I let the jeep get, the computer never changed the desired fan state to low or hi. Just stays off. The jeep knows the correct temp
Thanks to anyone who knows this particular cooling system.