03-13-2017, 02:33 PM
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#1
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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"chirping" from inside the front of the engine
I took my Boxster into the shop today to diagnose a "chirping". It really sounds like a belt noise but I took the belt off and the noise remained so off to the shop it went. They spend hours with a scope and found the noise to be coming out of the front center of the engine. I'm not sure if I want to invest a ton in tearing the motor apart but might try a shot in the dark with timing chain tensioners. Do you think that could be it? Any other ideas?
More "chirping" info
The chirp is the loudest at idle and then goes away as the revs climb (as oil pressure increases?). The chirp is sometimes just a single chirp and other times its continuous.
Thanks guys
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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03-13-2017, 03:54 PM
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#2
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Registered User
Join Date: May 2012
Location: Vancouver Island, Canada
Posts: 211
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I've heard the description of a 'chirping' noise that is caused by loose spark plugs as described in this thread:
http://986forum.com/forums/general-discussions/57402-chirping-squeal-engine.html
Hope this is a fix for you....cheap!
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'01 Boxster S (purchased new) triple black, litronics, cruise, heated seats,18's.
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03-13-2017, 04:12 PM
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#3
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by ccjazz
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Wow there's a new one! Worth a check
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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03-13-2017, 04:15 PM
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#4
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2003 Base 5-speed
Join Date: Jul 2015
Location: Stoneham, MA
Posts: 949
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When was your water pump last replaced? When the bearing in the pump in my car started to fail, it exhibited the exact sound and symptoms you describe. It may also be starting to weep a little coolant.
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03-13-2017, 04:47 PM
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#5
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by grc0456
When was your water pump last replaced? When the bearing in the pump in my car started to fail, it exhibited the exact sound and symptoms you describe. It may also be starting to weep a little coolant.
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I removed the belt so that would Eliminate that one.
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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03-13-2017, 05:08 PM
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#6
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2003 Base 5-speed
Join Date: Jul 2015
Location: Stoneham, MA
Posts: 949
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Oh, right. I skimmed past that part. Good luck identifying the cause.
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03-13-2017, 06:09 PM
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#7
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98 Arctic silver 986
Join Date: Jul 2011
Location: Upstate, NY
Posts: 1,452
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Tighten the plugs. Most likely the cause.
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03-13-2017, 06:17 PM
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#8
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Registered User
Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
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Read post #12 in the thread I have attached. Mr. Raby describes a squeak from excessive vacuum through the main seal from a failed AOS. I would think this could be verified by attempting to pull your oil cap with engine running. Since vacuum is greatest at idle and drops with RPM could be the cause. Location is also appropriate. Good Luck.
Did I toast the engine?
Last edited by 911monty; 03-13-2017 at 06:24 PM.
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03-13-2017, 06:31 PM
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#9
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by 911monty
Read post #12 in the thread I have attached. Mr. Raby describes a squeak from excessive vacuum through the main seal from a failed AOS. I would think this could be verified by attempting to pull your oil cap with engine running. Since vacuum is greatest at idle and drops with RPM could be the cause. Location is also appropriate. Good Luck.
Did I toast the engine?
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This is another good one. I'm feeling pretty good about the loose plug, the car also has a new exhaust leak from one cylinder (I thought it was from the headers( but I bet it's the plug). Crazy....
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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08-16-2023, 08:55 PM
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#10
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Registered User
Join Date: Sep 2006
Location: Montreal
Posts: 502
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Hi guys, I started hearing a chirping noise when car isn’t driven for a couple of days. Noise disappears after 10 to 15 seconds. Noise still present with belt removed. Anyone resolved this problem? Thanks
__________________
1997 Porsche Boxster manual
2018 Subaru WRX Sport Tech
2014 Honda CRV
2014 Mercedes Benz 350 ML
2015 Chevrolet Corvette Stingray manual
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08-16-2023, 09:09 PM
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#11
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Registered User
Join Date: Jul 2019
Location: Finland
Posts: 333
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Quote:
Originally Posted by Franco
Hi guys, I started hearing a chirping noise when car isn’t driven for a couple of days. Noise disappears after 10 to 15 seconds. Noise still present with belt removed. Anyone resolved this problem? Thanks ��
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Very common cause for that in these cars is a slightly loose spark plug. It starts chirping (kind of like a littel bird) usually when the engine heats up a bit.
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Boxster 2.7 2001 Manual
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08-17-2023, 05:19 AM
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#12
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Registered User
Join Date: Sep 2006
Location: Montreal
Posts: 502
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Quote:
Originally Posted by pilot4fn
Very common cause for that in these cars is a slightly loose spark plug. It starts chirping (kind of like a littel bird) usually when the engine heats up a bit.
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Thanks, I hear the noise on cold start for 10 to 15 seconds and then it stops. Thanks for your thoughts.
__________________
1997 Porsche Boxster manual
2018 Subaru WRX Sport Tech
2014 Honda CRV
2014 Mercedes Benz 350 ML
2015 Chevrolet Corvette Stingray manual
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08-18-2023, 02:15 PM
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#13
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Registered User
Join Date: Sep 2006
Location: Montreal
Posts: 502
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Quote:
Originally Posted by pilot4fn
Very common cause for that in these cars is a slightly loose spark plug. It starts chirping (kind of like a littel bird) usually when the engine heats up a bit.
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Verified the spark plugs today and found a loose one let’s hope that was the cause of the noise. Thanks for your help very appreciated, all the best to you from Canada
__________________
1997 Porsche Boxster manual
2018 Subaru WRX Sport Tech
2014 Honda CRV
2014 Mercedes Benz 350 ML
2015 Chevrolet Corvette Stingray manual
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08-19-2023, 04:20 AM
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#14
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Registered User
Join Date: Mar 2007
Location: Ohio
Posts: 2,015
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I'll bet addressing the plugs will fix it (probably in both cases). I had the same thing a couple years ago. "Chirp" is the word that perfectly describes the sound the car was making.
New plugs (they were due) torqued to spec, and new coil packs (frosting on the cake)...problem solved.
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