"chirping" from inside the front of the engine

[truegearhead]

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

[ccjazz]

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!

[truegearhead]

Originally Posted by ccjazz

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!

Wow there's a new one! Worth a check

[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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[truegearhead]

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.

[grc0456]

Oh, right. I skimmed past that part. Good luck identifying the cause.


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[tommy583]

Tighten the plugs. Most likely the cause.

[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.

http://986forum.com/forums/performance-technical-chat/54624-did-i-toast-engine.html

[truegearhead]

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.

http://986forum.com/forums/performance-technical-chat/54624-did-i-toast-engine.html

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....

[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 ��

[pilot4fn]

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 ��

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.

[Franco]

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.

Thanks, I hear the noise on cold start for 10 to 15 seconds and then it stops. Thanks for your thoughts.

[Franco]

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.

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

[Frodo]

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.