No Prob This place is great!

 

Ok now I got the new expansion valve in and everything seems to be ok. I drive it home and I am unloading a car in my driveway and I hear the belt start squealing. I run to the truck and turn off the ac and it stops squealing. I opened the hood and I blew a gasket on the drier. I hate working on ac systems. What should I do now? When I recharged it the high side pressure was 225 but I guess when it idled for 10 minutes the fan was not moving enough air to cool the condensor and built too much pressure.

 

Try washing out the condenser and raditor by water hose, if problem is still present, add electric fan.

 

Yea I have already washed the rad and condensor out. The thing is there is no where to put an electric fan unless I remove the engine fan.

 

It is odd that you would blow the gasket on the receiver/ dryer but at least it saved the relief on the compressor.

If I were to charge with anything other than R-12 I would automatically install a condenser fan, I know that there is not much room if you have an intercooler but I would go the junk yard and check out the front wheel drive imports almost anything with a traverse engine is going to have a condenser unit with a pancake fan I would try to mount 2 of them on the outside of the radiator if possible. Install them using a relay directly to the battery and tap the trigger directly into the compressor clutch feed so whenever the clutch is engaged the fan is running.

Other than a damaged compressor about the only things that will cause a belt to slip would be excessive high head pressure, old worn serpentine belt, weak tensioned or a combination of all of them.

I think that the lack of airflow is your problem, if you were to feel the amount of air or the lack of it coming from the back of the fan at an idle you can see why, the Cummins runs so cold when it is not pulling a load the fan clutch freewheels most of the time only drawing minimal amount of air through the radiator and condenser that is why the air conditioner always works good when you are driving on the freeway at 80 MPH with all of the ram air.

If you have ever heard your fan when the clutch engages you will know what it sounds like when it is doing its job.

If you do not want to or cannot install an auxiliary condenser fan then you could also install a High Idle solenoid to your linkage that would set your idle around 900-1000 RPM whenever the AC is on.

Do you have a set of gauges; remember that you pressures are in direct relationship with the ambient temperatures.

Here is a Pressure/ Temperature Chart that you can download.

http://sporlan.jandrewschoen.com/Form1.pdf

I would consider this chart to be accurate.

Jim

 

Thanks for the help Jim I think a fan is exactly what I need. I am thinking about removing the stock fan and installing an electric unit. I am just trying to find the right one that will suit my needs.