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01-21-2018, 12:56 PM
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#1
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Registered User
Join Date: Dec 2014
Location: SF Bay Area
Posts: 239
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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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01-21-2018, 03:21 PM
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#2
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Registered User
Join Date: Dec 2014
Location: SF Bay Area
Posts: 239
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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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01-21-2018, 03:22 PM
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#3
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,569
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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.
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff. 
https://www.youtube.com/user/12shoes2
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01-21-2018, 03:25 PM
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#4
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,569
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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.
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
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01-21-2018, 04:51 PM
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#5
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Registered User
Join Date: Jul 2017
Location: Tucson AZ
Posts: 494
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Quote:
Originally Posted by martsink
Found the issue. Had to top up power steering fluid. I guess the noise was coming from the pump.****
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Cavitating air will make it whine. Same with the slave cylinder.
__________________
2001 Boxster
2007 Toyota Highlander 
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01-22-2018, 02:42 AM
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#6
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Registered User
Join Date: Jul 2013
Location: Bastrop, Tx
Posts: 2,231
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What happen to putting a V8 into it?
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Woody
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01-22-2018, 06:59 AM
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#7
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,255
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Oh
Quote:
Originally Posted by Brian in Tucson
Cavitating air will make it whine. Same with the slave cylinder.
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I never heard a slave cylinder whine .. 
Last edited by Gilles; 01-22-2018 at 07:26 AM.
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01-24-2018, 08:49 PM
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#8
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Registered User
Join Date: Dec 2014
Location: SF Bay Area
Posts: 239
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Quote:
Originally Posted by itsnotanova
What happen to putting a V8 into it?
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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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