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Posted: 4/26/2015 1:54:21 PM EDT
Been trying to track down a "chirp" sound coming from the car for the last three months. Let me give you some details. I did a full rebuild on the engine last year, I did not cut any corners. It's a 2.8 vr6 swap in my mk2. I'm sure a lot of you aren't vw fans and I feel sorry for you! The Machine work was done at one of the best, if not the best shop in Oregon. I'm a firm believer in doing it right the first time. The engine has right around 8k on it now, and runs great. The "chirp" sound started to develope a few months ago after the trans had to come out do to a bent shift fork. Once the trans went back in is when it started. Initially I thought it was the throwout bearing but it doesn't change when engaging/disengaging the clutch, ontop of that the noise isn't even coming from the trans or sound related to the trans. The noise is coming right out the exhaust, sounds like a couple sparrows are in the muffler. So I assumed an exhaust leak. Nope. I've replaced the header, along with a new exhaust manifold gasket, donut gasket down at the collector, pulled the serp belt, it's been on the lift twice while looking for leaks and if anything is lose/rubbing. Haven't found anything. Uncorked the exhaust down at the collector and you can still hear it over the open header. I'm starting to think its cylinder head related. So I'm just seeing if anyone has any other ideas before I pull the head.


Link Posted: 4/26/2015 2:05:04 PM EDT
vacuum leak somewhere?
Link Posted: 4/26/2015 2:09:53 PM EDT
You sure it's not a belt or accessory?
You can remove the belt and run the car for a minute to see.
Link Posted: 4/26/2015 2:11:06 PM EDT
Ive been there can be frustrating.
Link Posted: 4/26/2015 2:12:16 PM EDT
How about a video of said chirping?
Link Posted: 4/26/2015 2:15:14 PM EDT
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Originally Posted By MillerSHO:
You sure it's not a belt or accessory?
You can remove the belt and run the car for a minute to see.
View Quote

Done this already
Link Posted: 4/26/2015 2:18:28 PM EDT
Have you used a stethescope,  maybe  help get you closer to were its coming from .
Link Posted: 4/26/2015 2:51:26 PM EDT
[Last Edit: 4/26/2015 2:58:43 PM EDT by RINO_Hunter]
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Originally Posted By mr_stretchy:

Done this already
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Originally Posted By mr_stretchy:
Originally Posted By MillerSHO:
You sure it's not a belt or accessory?
You can remove the belt and run the car for a minute to see.

Done this already


was thinking this first too.

does the chirp keep up with engine speed or is it flat?

ETA: get in there and kick some stuff around. sit on the engine when running, spray some lube on everything safe to do so. kick the muffler a couple times, wrangle some things with your hands...
Link Posted: 4/26/2015 10:26:16 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By RINO_Hunter:


was thinking this first too.

does the chirp keep up with engine speed or is it flat?

ETA: get in there and kick some stuff around. sit on the engine when running, spray some lube on everything safe to do so. kick the muffler a couple times, wrangle some things with your hands...
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By RINO_Hunter:
Originally Posted By mr_stretchy:
Originally Posted By MillerSHO:
You sure it's not a belt or accessory?
You can remove the belt and run the car for a minute to see.

Done this already


was thinking this first too.

does the chirp keep up with engine speed or is it flat?

ETA: get in there and kick some stuff around. sit on the engine when running, spray some lube on everything safe to do so. kick the muffler a couple times, wrangle some things with your hands...


This-  and this:


Originally Posted By Mossberg:
How about a video of said chirping?


We need to know if it's rhythmic or random, the frequency and pitch...
Link Posted: 4/26/2015 10:38:28 PM EDT
Owned one of the original Grand Am's, wife complained about a chirp when it shifted. 9000 miles on car when right front had to be replaced.  It was chirping ok. Even now when I let her drive my Explorer the fuel mileage immediately drops 2-3 tenths. At least it doesn't chirp. Somethings never change.
Link Posted: 4/26/2015 10:42:37 PM EDT
V-tech not kicking in fully.
Link Posted: 4/26/2015 10:45:24 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By helmutlent:
V-tech not kicking in fully.
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I thought Vtech was a Honda thing.
Link Posted: 4/26/2015 10:46:28 PM EDT
Sounds like a valve not seating properly.  A video would help give a better idea.
Link Posted: 4/26/2015 10:50:39 PM EDT
Had a chirp replaced altenator tensioner and idler pulley.



ended up being th e harmonic balancer was coming apart.




it finally came apart didn't hurt anything just took a couple days to get it off.
Link Posted: 4/26/2015 10:58:15 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By hanau:
Had a chirp replaced altenator tensioner and idler pulley.

ended up being th e harmonic balancer was coming apart.


it finally came apart didn't hurt anything just took a couple days to get it off.
View Quote


Had that happen in my Jeep.
Wore a hole in the timing cover and sprayed oil all over. Fun.

Link Posted: 4/26/2015 11:00:55 PM EDT
[Last Edit: 4/26/2015 11:02:35 PM EDT by 103]
Have you tried replacing your throw-out bearing? I've never worked on a VW, but there's gotta be a bearing in there. They chirp when they are going bad, have a lube issue, or sometimes just because. Considering your trans was removed and then the sound started, it would make sense to me.

ETA: Just read the rest of your post, lol. I'd still replace the T/O bearing and see if that changes anything. It's like an $8 part. And depressing the clutch pedal doesn't always make a T/O bearing squeak go away.
Link Posted: 4/26/2015 11:06:06 PM EDT
It's always the last thing you worked on when the problem started.
Link Posted: 4/26/2015 11:22:25 PM EDT
Id take it back to the "best vw shop in Oregon" vs asking us broke back mountain camaro drivin retards.
Link Posted: 4/26/2015 11:28:18 PM EDT
You asked this over @ VWVortex?

Great choice in cars btw.  I'm building a 90 GLI with a cammed and carbed (Dellorto 45s) 2l 16v.
Link Posted: 4/27/2015 12:14:23 AM EDT
Originally Posted By mr_stretchy:
The "chirp" sound started to develope a few months ago after the trans had to come out do to a bent shift fork.
View Quote


You know what you have to do
Link Posted: 4/30/2015 8:20:45 PM EDT
Update?
Link Posted: 4/30/2015 8:27:32 PM EDT
[Last Edit: 4/30/2015 8:28:03 PM EDT by Goodn]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Mediumrarechicken:
Id take it back to the "best vw shop in Oregon" vs asking us broke back mountain camaro drivin retards.
View Quote



Hurr Durr

Listen to the noob.  Because no one here has ever worked on a car in their life.  This is a gun forum!  There is no mechanics of gearheads/builders here.  Right?


Link Posted: 4/30/2015 8:37:08 PM EDT
I will have to go with the TO Bearing.
Link Posted: 4/30/2015 8:39:27 PM EDT
did you take the drive belt off to see if the noise goes away?
Link Posted: 4/30/2015 8:41:24 PM EDT
I bet it's a pulley making the noise.
Link Posted: 4/30/2015 8:43:06 PM EDT
[Last Edit: 4/30/2015 8:45:36 PM EDT by wildearp]
Does it stop in neutral with the clutch released?  Could be a thrust/end play issue.
 



A better sound system with a good amplifier cures most rattles and squeaks.  
Link Posted: 4/30/2015 9:05:26 PM EDT
the dust shield between the engine and trans may be dented, which will come in contact with the flywheel.

It is also possible the noise is coming from a exhaust valve. I belive Ive seen that before But I'm not remembering right now.


nice car btw..

Heres my brothers car.


87 jetta coup, vr6 turbo, should be near 400hp.
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