She whistles at me...

[Black06]

New sound, no loss of performance, but wondering if there's something I need to address.

Variables:
1. 40,000 miles on the clock
2. Driving with no load
3. 40 degF outside (may or may not be a factor as it's been this temp. for weeks)
4. Engine is at steady operating temperature (not a cold engine).

As I accelerate (moderate), 20psi boost, when I let off, I get a faint whistle (not the turbo spooling down), but like a leak from a balloon that seals-up as the pressure drops.

Thoughts ?

 

[BamaSixGun]

Are you talkin about the "turbo fart?"

When you let off the throttle real quick after speeding up and it sounds like a whoopy cushion?

 

[Black06]

Are you talkin about the "turbo fart?"

When you let off the throttle real quick after speeding up and it sounds like a whoopy cushion?

Nope - that one is distinct. This sounds like an air leak that seals-up after about 2 seconds. Is there something that controls or relieves backpressure that's not sealing ? Perhaps a valve that might not be seating correctly at first ?

 

[F350DRW1]

Chances are its the overflow bottle letting off some steam. You may have too much coolant in the tank, or your egr cooler may have a crack. I would have it pressure tested. Sounds like a little tea kettle for a few seconds and then goes away, correct?

 

[Black06]

Chances are its the overflow bottle letting off some steam. You may have too much coolant in the tank, or your egr cooler may have a crack. I would have it pressure tested. Sounds like a little tea kettle for a few seconds and then goes away, correct?

Yes - that's the sound.
I'm hoping it's the overflow bottle - as the sound is not 100% repeatable all the time.
Any quick test to rule-out a cracked EGR cooler; evidence of a leak or other means rather than a return to the dealer ?
Thanks

 

[BamaSixGun]

Does it puff heavy white smoke?

Thats what my 6.0 did on 3 seperate occasions when the EGR cooler was bad.

There was also a TSB where they put a new fill level label on the degaus bottle, so as not to over fill it.

 

[Black06]

Does it puff heavy white smoke?

Thats what my 6.0 did on 3 seperate occasions when the EGR cooler was bad.

There was also a TSB where they put a new fill level label on the degaus bottle, so as not to over fill it.

No - no smoke observed whatsoever.

I'll keep an eye on the bottle level. Thanks for your feedback.

 

[bushpilot]

Yes - that's the sound.
I'm hoping it's the overflow bottle - as the sound is not 100% repeatable all the time.
Any quick test to rule-out a cracked EGR cooler; evidence of a leak or other means rather than a return to the dealer ?
Thanks

make sure youre not OVER filling the coolant degas (or as you say, overflow) bottle,
there is a TSB that changed the fill level (sticker that shows new fill level).

the tsb is for ALL 6.0L (not just the 2005 as shown in the link) -->

FDDTS - Recall In Review - 05B32

you can also buy a KIT (39 bucks) to detect combustion leaks (if its
leaking into the coolant)
Lisle Tool Corporation - 75500 Combustion Leak Detector

 

[no-red 6 0]

gotta look something like this...

 

[F350DRW1]

No - no smoke observed whatsoever.

I'll keep an eye on the bottle level. Thanks for your feedback.

Cap could be bad, best possible scenario. If the egr cooler splits a gizzard, you'll know it. Your coolant will suddenly vanish, and when you top it and start it you'll get the white smoke. Running stock tunes or is it jazzed up a little?