my truck sounds like a tea kettle!?

[barry1me]

My truck is making a high pitch noise that seems to be changing with boost. What is strange is doesnt seem to do it everytime. I have had 6.0Ls and I know what they sounded like when an uppipe or a flex blew. When those happened on a 6.0L the noise wouldnt turn on and off. Please help as I dont really know where to begin on how to diagnose the problem.

Last night I pulled 6K lbs and the truck would make the noise, then half hour later it wouldnt. Today the truck is not making any noise. FWIW im running the Spartan 250 tune.

Spartan Diesel Tech

[navyeoseabee]

sounds like one of your clamps are leaking.... just guessing.... but if the metal clamps are heating up to a point of explanation it may have a small gap to make the whistle sound meaning for the off and on sound. again this is just a guess.

[euro]

video of mine doing it this morning.

Truck sat in 45 degree garage all night. I pulled it out of the garage and had been running about 10 minutes idling when I pulled out on my snow covered roads... Then the noise began. After the truck warmed up.. no more noise.

http://www.youtube.com/watch?v=WQosrFJ8h_w

[dieselkane]

Any puking coolant, or excessive coolant pressure?

[euro]

Im ging to check it out tomorrow for residue in the coolant resivoiur. and I'l try to see that ss flex pipe others have talked about between the manifold and the turbo. apparently they leak and need to be replaced according to others on here and that involves a cab take-off at the dealer.

[greasltn]

The up-pipe can be changed cab-on but it's a huge PITA.