Recent Content by cajun_cummins

Thanks for the reply. So to add some more information. I went yesterday and spent several hours in the driveway trying to make the sound and establish a pattern. It only makes the noise if the fan clutch is fully engaged and the engine is revved. I can hear the difference in the fan when...

I have been dealing with an intermittent whistling noise for over a year. I have finally managed to capture a video of it so others can hear the sound as well. Initially it was very seldom heard, but it has gotten worse recently. The truck is an 07.5 with EGR, DPF and CCV Deletes...