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Old 04-09-2017, 03:58 PM   #1
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High pitch whistle/squeal after turbo change

Hey gang, hoping someone can help me out.

After I replaced my turbo, I now have a high pitch whistle/squeal at high RPM's sitting in neutral and stepping on it ~3000 RPM's and when I'm accelerating hard like when the turbo kicks in.

Thinking it's a leak and from some searching, thinking its on the output side of turbo since I'm not noticing any performance issues. Bus takes off like it used to were you can feel the turbo kick in and bus zooms away. Just one hell of a squeal and as I let of just a little it goes away.

Exhaust side leaking?

Thanks for any help.
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Old 04-09-2017, 04:09 PM   #2
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Check the hose clamps on the "pressure" side of the turbo, one or more are just a tad loose.... (including all clamps to the engine intake.)
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Old 04-09-2017, 06:44 PM   #3
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Thanks. Now that the engine is cool I will check them all. Figured it must be something like that.
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Old 04-09-2017, 07:30 PM   #4
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Check the hoses as well as they can split and cause that noise.
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Old 04-09-2017, 08:32 PM   #5
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Thank you again for the advice. Turned out I didn't have the iner cooler clamps on the boot farthest away from the turbo tight. Was confident I had everything on the turbo tight as I checked those all 3 times before I fired it up. Just forgot that one boot 3 feet away from the turbo.

That was a big job I've never done before, but now that I have a great garage, the right tools, and the Internet with folks like y'all, I'm finding there's just about no job to big.
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Old 04-19-2017, 04:27 PM   #6
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Quote:
Originally Posted by gsf35099 View Post
Thank you again for the advice. Turned out I didn't have the iner cooler clamps on the boot farthest away from the turbo tight. Was confident I had everything on the turbo tight as I checked those all 3 times before I fired it up. Just forgot that one boot 3 feet away from the turbo.

That was a big job I've never done before, but now that I have a great garage, the right tools, and the Internet with folks like y'all, I'm finding there's just about no job to big.
Did that fix it??? A lot of the times a high pitch squeal is an exhaust leak at the turbo flange.

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Old 04-20-2017, 06:08 PM   #7
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Did that fix it??? A lot of the times a high pitch squeal is an exhaust leak at the turbo flange.

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It did fix the problem. The whistle was coming from when the boost would reach a point it could break the seal of the boot to metal. Running great and quite now like it should!!
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