Compression Ignition Addict
Join Date: Nov 2008
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unusual whistle when letting off gas
Could this be the death whistle of bad head gaskets?
My truck is an 06 with 87k miles.
S&B intake, 4" MBRP TB exhaust, SCT Xcal 2 with street tune currently.
It doesn't make the sound when accelerating, only when letting off the gas. I noticed it tonight after getting to 80mph quickly and then coasting back down to about 60. It made this unusual, low pitched whistle. It was obvious, but it wasn't a high pitched whistle by any means.
I don't tow often at all and I drive fairly conservative. No racing, but I do like to get to my crusing speed a little quicker than most.
I'm not puking coolant, not using coolant. I do blow some white smoke on cold mornings when I first crank her up to warm, but when I put it in drive and start going, NO smoke.
Should I have a dealership check it out?
Can this be repaired under warranty?