Hey everyone,
Here’s another TJ forum post about overheating at idle bear with me here. I’ve done research on what could be causing an overheating issue at idle and can’t quite narrow down what the issue is.
Some Context:
My Jeep when driving in stop-go traffic will slowly creep up in temperature at traffic lights unless I’m moving and getting air through the radiator fins which causes the temperature to drop back down to normal ranges. I’ve replaced the following chasing this issue:
1.) Mopar 195* Thermostat+Housing
2.) Mopar Water Pump
3.) CSF Radiator 3244
4.) All coolant hoses
5.) New Coolant (G05 Zerex)+flush
6.) DEI heat soak kit+new O-rings
7.) Burped the system at an incline with heat on max until at operating temperature
These were all done within the last 6 months and the issue has persisted. I also replaced the fan clutch back in 2020 and did both test (running to full operating temp then shutting off and seeing if fan continues to spin/checking for grinding/too much resistance). The fan clutch seems healthy and has no signs of leaking. I’ve also checked all other cooling components and have not seen any coolant leaks even with use of dye and a UV light. Coolant levels have also been checked in the radiator and the reservoir look great.
The only thing I could think it would be would be the catalytic converters, in 2021 I had a lean condition and multiple misfires caused by a short in the engine’s wiring harness that I repaired and has not given me an issue since. I did however drive the Jeep in that condition for roughly a week or so because I was a college student with little money at the time. The catalytic converters are original with the two pre-cats and the main catalytic converter in the back. There isn’t a CEL code for the converter (or any code for that matter) so it’s purely speculation aside from the symptoms of running warm like loss of power and decreased fuel economy.
What would be the best way to verify that the catalytic converter is toast without completely unbolting it from the exhaust manifolds and cutting it open? Are there any other things that could be causing this issue that I can look into? TIA!
2002 Jeep Wrangler X
4.0L Inline 6
32RH 3-Speed
Here’s another TJ forum post about overheating at idle bear with me here. I’ve done research on what could be causing an overheating issue at idle and can’t quite narrow down what the issue is.
Some Context:
My Jeep when driving in stop-go traffic will slowly creep up in temperature at traffic lights unless I’m moving and getting air through the radiator fins which causes the temperature to drop back down to normal ranges. I’ve replaced the following chasing this issue:
1.) Mopar 195* Thermostat+Housing
2.) Mopar Water Pump
3.) CSF Radiator 3244
4.) All coolant hoses
5.) New Coolant (G05 Zerex)+flush
6.) DEI heat soak kit+new O-rings
7.) Burped the system at an incline with heat on max until at operating temperature
These were all done within the last 6 months and the issue has persisted. I also replaced the fan clutch back in 2020 and did both test (running to full operating temp then shutting off and seeing if fan continues to spin/checking for grinding/too much resistance). The fan clutch seems healthy and has no signs of leaking. I’ve also checked all other cooling components and have not seen any coolant leaks even with use of dye and a UV light. Coolant levels have also been checked in the radiator and the reservoir look great.
The only thing I could think it would be would be the catalytic converters, in 2021 I had a lean condition and multiple misfires caused by a short in the engine’s wiring harness that I repaired and has not given me an issue since. I did however drive the Jeep in that condition for roughly a week or so because I was a college student with little money at the time. The catalytic converters are original with the two pre-cats and the main catalytic converter in the back. There isn’t a CEL code for the converter (or any code for that matter) so it’s purely speculation aside from the symptoms of running warm like loss of power and decreased fuel economy.
What would be the best way to verify that the catalytic converter is toast without completely unbolting it from the exhaust manifolds and cutting it open? Are there any other things that could be causing this issue that I can look into? TIA!
2002 Jeep Wrangler X
4.0L Inline 6
32RH 3-Speed
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