First time poster. Bought my truck used last year, 116000 miles. My first diesel. It's developed a whining noise. Here are the particulars;
2007 Chevy LBZ 3500 6.6L diesel, dually, CC, LB, 4x4, 134,000 miles.
At the end of our 2000 mile trip, coming through the mountains on US-23, KY to VA, the truck started overheating on uphills pulling a 13,000 lb 5th wheel. Heard a whining sound (not a whistle) and assumed the fan clutch. Had it replaced when we got home.
Downhill and flat roads, temps were normal.
Still whining, getting worse.
Starts when engine is warmed up, about 160+.
Whines on moderate acceleration, stops immediately when you let off the gas.
Does not whine faster as RPM increases but it does get louder.
Does not do it in PARK or while brake is held, in gear, revving up the engine.
Braking, turning or switching the AC on/off has no effect.
If this video uploads, listen to the background. Last 5 seconds of video, it gets louder. Right after my friendly GPS says "Speed Warning" LOL
https://dl.dropboxusercontent.com/u/48781439/2015-07-11%2019.57.10.mp4
2007 Chevy LBZ 3500 6.6L diesel, dually, CC, LB, 4x4, 134,000 miles.
At the end of our 2000 mile trip, coming through the mountains on US-23, KY to VA, the truck started overheating on uphills pulling a 13,000 lb 5th wheel. Heard a whining sound (not a whistle) and assumed the fan clutch. Had it replaced when we got home.
Downhill and flat roads, temps were normal.
Still whining, getting worse.
Starts when engine is warmed up, about 160+.
Whines on moderate acceleration, stops immediately when you let off the gas.
Does not whine faster as RPM increases but it does get louder.
Does not do it in PARK or while brake is held, in gear, revving up the engine.
Braking, turning or switching the AC on/off has no effect.
If this video uploads, listen to the background. Last 5 seconds of video, it gets louder. Right after my friendly GPS says "Speed Warning" LOL
https://dl.dropboxusercontent.com/u/48781439/2015-07-11%2019.57.10.mp4