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Old 01-21-2018, 12:56 PM   #1
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First Start Up After Engine Refresh - Weird whining noise near intake

Hey Guys,

I finally got around to fixing the cam issues (dislodged freeze plug) that i suffered the first time started the car. This time around this are going much better, but there a weird noise coming from around the intake/throttle body. Its not constant, seems to cycle every 5 seconds or so.

In the video below you can hear the noise starting at round 18 seconds when I rev the engine, and then it gets pretty evident again around 35 seconds. Any thoughts?

Other than the noise, the car is running pretty smoothly with no codes

https://www.youtube.com/watch?v=oC2srsJaPss

Edit: I have a durametric unit, if there's anything I can check
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Old 01-21-2018, 03:21 PM   #2
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Found the issue. Had to top up power steering fluid. I guess the noise was coming from the pump.****
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Old 01-21-2018, 03:22 PM   #3
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Sometimes it's hard to discern the source of a noise. I have found that using a flexible plastic tube, one end to my ear and the other end sleuthing around in the engine bay, can help pinpoint the culprit.
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Old 01-21-2018, 03:25 PM   #4
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Ah, you beat me to it! If your PS fluid level is low, you might check around for leakage. Sometimes it's o-rings between the pump parts or in the tubes/connectors.
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2004 986 S
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Old 01-21-2018, 04:51 PM   #5
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Quote:
Originally Posted by martsink View Post
Found the issue. Had to top up power steering fluid. I guess the noise was coming from the pump.****
Cavitating air will make it whine. Same with the slave cylinder.
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Old 01-22-2018, 02:42 AM   #6
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What happen to putting a V8 into it?
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Old 01-22-2018, 06:59 AM   #7
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Oh
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Originally Posted by Brian in Tucson View Post
Cavitating air will make it whine. Same with the slave cylinder.
I never heard a slave cylinder whine ..

Last edited by Gilles; 01-22-2018 at 07:26 AM.
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Old 01-24-2018, 08:49 PM   #8
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What happen to putting a V8 into it?
Hey Woody. This is my 996 engine. I picked up the 996 a couple of years ago for 5 grand w IMS failure. Finally put in the time to finish rebuilding the engine.

The V8 986 is still alive and kicking. I actually gotta do a lot more work omn it now that the 996 is finished. Look out for my PMs
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