stockli
NAXJA Forum User
- Location
- Ft. Collins
I have a 98 with 4.0 that simply will not blow hot air from the vents.
I have flushed the core and found that water flows freely through the core so plugging should not be an issue. My jeep is an SE model and has a mechanical wire controlled blend door, so vacuum on the door should not be an issue. I have made sure that the blend door is free and operating normally.
I have checked everywhere for vac leaks and cannot find any. The system blows out of the vents at all RPM ranges and does not blow from the defroster vents unless defrost is on.
Sometimes it will blow decently warm for a time, then cold again. sometimes the air will get warmer as the RPMs go up while driving.
My jeep will heat up to only 203 and takes a while to get there. The thermostat was replaced with the higher end staunt unit and same with the cap. I have not had issues with overheating at all.
In addition the pump is not leaking and I have not observed any leaking coolant at all.
Is there a possibility that the pump has deteriorated to the point that coolant is not flowing through the system enough? Thats the last thing I can think of at this point. I am thinking it would be a good idea to change the pump anyway as the history of the pump is unknown. My coolant is nice and green and doesnt have any rust in it that I can see.
I need to get this licked as its starting to get a bit nippy out! :helpme:
I have flushed the core and found that water flows freely through the core so plugging should not be an issue. My jeep is an SE model and has a mechanical wire controlled blend door, so vacuum on the door should not be an issue. I have made sure that the blend door is free and operating normally.
I have checked everywhere for vac leaks and cannot find any. The system blows out of the vents at all RPM ranges and does not blow from the defroster vents unless defrost is on.
Sometimes it will blow decently warm for a time, then cold again. sometimes the air will get warmer as the RPMs go up while driving.
My jeep will heat up to only 203 and takes a while to get there. The thermostat was replaced with the higher end staunt unit and same with the cap. I have not had issues with overheating at all.
In addition the pump is not leaking and I have not observed any leaking coolant at all.
Is there a possibility that the pump has deteriorated to the point that coolant is not flowing through the system enough? Thats the last thing I can think of at this point. I am thinking it would be a good idea to change the pump anyway as the history of the pump is unknown. My coolant is nice and green and doesnt have any rust in it that I can see.
I need to get this licked as its starting to get a bit nippy out! :helpme: