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07.5 - 09 3rd Gen 6.7L Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine, Transmission, etc...NO ADVERTISING

Thread: Squeal around 30 PSI boost?? Reply to Thread
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  Topic Review (Newest First)
04-14-2019 08:09 AM
El Pozzinator Yep. My 08 did it at ~12psi when I got a boot crooked and hadnít fully snugged a clamp. Sounds kinda like a flat horn reverberating under the hood by the turbo.

Check your clamps, boots, and anything plastic between the turbo and intake.

Good luck!

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04-13-2019 03:16 PM
Rhinopkc Boost leak. Had an 09 with a bad gasket at the intake horn to grid heater connection make a noise like that.
04-13-2019 01:45 PM
Originally Posted by GTIgus View Post
I have a video on youtube but the forum won't let me add it since I don't have enough posts... :-/

Just paste the link, we can click it just fine (or those of us that TapaTalk on mobile will see the video with just the link posted.

My 2000 had a squeal going around 38-42PSI, it was the horn boot, had a 1/2Ē crack forming coming from the clamp up.

It took forever to find it because it would not leak with my boost leak tester at 30psi, I didnít want to go higher. I found it visually when I pulled to horn off one day. Wasnít sure it was to source but when I replaced the boot it was gone.
04-13-2019 12:49 PM
GTIgus I have a video on youtube but the forum won't let me add it since I don't have enough posts... :-/
04-13-2019 12:47 PM
GTIgus Just visually, I haven't made a boost leak tester yet to pressurize the system. Do you think a split or hole would cause that symptom? Thanks!
04-13-2019 12:46 PM
gmbohuntr Did you check for splits in the boots?

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04-13-2019 12:44 PM
Squeal around 30 PSI boost??

Hi All, I've got a 2008 CTD Ram 3500 with about 95k miles. I've only had the truck for a month or so.

When I got the truck I replaced all fluids and filters right away, then installed a full delete kit and 4" exhaust with muffler and H&S Mini Maxx.

About 2 weeks ago we took it for a 350 mile road trip drive to see some family. On the way home I pulled onto the interstate from a rest stop and got on it pretty hard. Around 30PSI of boost, as indicted by the mini maxi, I heard a squealing kind of sound coming form the turbo area, so I backed off.

Now, every time I get around 30 PSI boost Io get the same noise. There's no power or running issues otherwise, just the noise at high boost. I've checked for leaks around the manifold and turn mounting, as well as tightened all my intercooler boots to no help. Any ideas? Thanks in advance!

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