Turbo Whistle
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Turbo Whistle
I have a 05 F-350 DRW CC. When I’m pulling my toy hauler, 11,000+ lbs, up on relatively steep incline I hear what sound like a computer fan spin up and then the turbo starts to make a high pitch whistling noise. The turbo boost will be at around or just above 30 PSI. This only happens when I’m pulling this much load. Does this happen to anyone else?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Jammer151,
First off welcome to FTE, lots of good people and info around here.
Okay, now for the noise, it is Not your turbo, it is the Viscous computer controlled Fan clutch locking up to draw more air through the radiator to help with cooling as the engine gets warmer. The PCM controlls the fan clutch and can lock and unlock it as need. And yes it is very loud when locked up.
Also if you have not done so yet, i suggest installing gauges, EGT, Trans Temp, Volts as a minimum so you can monitor these when you tow. The only gauges on your dash that are accurate are the fuel and boost gauges. The other gauges are glorified idiot lights.
Also drop down to the 6.0 section of the forum where there is alot more specific info on your truck, and resident diesel techs hangout there as well.
Hope this helps
First off welcome to FTE, lots of good people and info around here.
Okay, now for the noise, it is Not your turbo, it is the Viscous computer controlled Fan clutch locking up to draw more air through the radiator to help with cooling as the engine gets warmer. The PCM controlls the fan clutch and can lock and unlock it as need. And yes it is very loud when locked up.
Also if you have not done so yet, i suggest installing gauges, EGT, Trans Temp, Volts as a minimum so you can monitor these when you tow. The only gauges on your dash that are accurate are the fuel and boost gauges. The other gauges are glorified idiot lights.
Also drop down to the 6.0 section of the forum where there is alot more specific info on your truck, and resident diesel techs hangout there as well.
Hope this helps
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Originally Posted by blackhat620
The PCM controlls the fan clutch and can lock and unlock it as need.
I was unaware the PCM controls it - is this true?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by krewat
Huh? Something new? Based on a discussion/debate I had a while back, I thought the 6.0's fan is a regular viscous clutch with a bimetalic coil to lock up the clutch when the air gets hot?
I was unaware the PCM controls it - is this true?
I was unaware the PCM controls it - is this true?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by krewat
Huh? Something new? Based on a discussion/debate I had a while back, I thought the 6.0's fan is a regular viscous clutch with a bimetalic coil to lock up the clutch when the air gets hot?
I was unaware the PCM controls it - is this true?
I was unaware the PCM controls it - is this true?
It is on Page 54
http://www.backglass.org/duncan/ps60...l/ps60_054.jpg
Here is the link to the 6.0 Tech manual in the "Tech folder" in the 6.0 section of the forum.
http://www.ford-trucks.com/forums/30...ch-folder.html
Hope this helps
