[06TDIGuy]

Hi Everyone,

I got another question for anyone out there. I just ordered the stuff to do the timing belt on the car, being that I have no idea if it was ever done. But on a totally different note:

Today I was sitting in the car with it idling, waiting for someone, when I started to hear a knocking sound. I had all the windows up, no air on, and it sounded like someone was pounding on something with a hammer at a distance. It knocked about 6-8 times then stopped, then a short time later (maybe 30-45 seconds, same thing happened again. It was not really loud, and I could not feel anything in the car, but I know it was coming from the car. The first thing that came to mind was the noise was coming from the transmission. Drove away, and didn't notice any problems.

Second issue. When I press the clutch pedal, before it releases the clutch, I can feel a pulsation/vibration in the pedal that corresponds with engine RPM. The higher the RPM, the more rapid the pulsation. I cannot feel it once the clutch is disengaged. Does that sound like a throwout bearing? Or possibly a flywheel?

Any ideas on what to check or look for would be very helpful.

Thanks

 

[Stefan2006]

Was it a rough idle or just knocking? With 122k, you're probably on the original belt and way overdue...drive another car if you can. As the belt ages, the belt stretches and the timing drifts. I would wait until the timing belt is done before you start freaking out but it could be the flywheel since you said it was coming from the transmission.

The clutch pedal thing is normal, it's always done it.

 

[06TDIGuy]

It was just knocking. The idle has felt pretty good, occasionally it has loped just a bit at idle, but does not last long. Good to know the clutch pedal thing is normal, thanks!

 

[chittychittybangbang]

All the TDI I've had had some clutch pedal vibration. See if you can isolate the knocking. Is the flywheel possible? Yes.

 

[06TDIGuy]

Do the manual trannys have the dual mass flywheel? Is that what could be causing the knocking? Problems with it coming apart maybe? I'm not too worried about it right now.

 

[PETERHALAT]

Hello. I believe most vw/audi tdi have dual mass flywheel. My 2002 golf tdi does. I hope this helps.

 

[Keithuk]

http://www.myturbodiesel.com/forum/f19/clutch-pedal-pulsating-vibrating-2915/

 

[06TDIGuy]

Hmmmm, Interesting thread on the clutch pedal thing. I have the exact same feeling in the pedal, for the first couple inches, then goes away. It's not a big deal, but in stop and go driving it does get a bit annoying.

The reason that I posted the question about the clutch was just for reliability issues. If there are a lot of other people out there that have it, and it has never been an issue for longevity, then I really don't mind a whole lot if it vibrates. Thanks for the info that you have on the topic!

 

[Keithuk]

Well the thing that bugs me is the dealer says they all do it and the replies to that thread on a few forums say some do it and some don't. If its a feature of the crappy dual mass flywheel then they should ALL do it not some.

As reqards reliability issues I want it sorting under warranty not having to pay £1500 for a new DMF a few years down the road.

 

[06TDIGuy]

So is the dual mass flywheel VW's solution to a harmonic balancer? You would think that the aftermarket would be able to come up with a solution to this problem when a clutch needs to be replaced.

Check this link out http://www.dieselgeek.com/servlet/Categories?category=Clutch+Upgrade+Kit this is a whole new clutch/DMF that is claimed to be "Factory Super Smoothness." I guess that is a bit of an oxymoron right? If all the clutches vibrate from the factory, there is no such thing as smooth. Unless you are one of the lucky ones to have a clutch from the get-go that is smooth.

Anyone ever used this clutch with any success? Vibration go away maybe?

 

[vduber]

I recently just upgraded to an '04 manual tranny from my long time '02 automatic. Its been years since I've driven a manual as a daily driver but since these are so sporty I don't mind it much.

I've been having the same concern about my clutch. It seems as though its rough to engage and makes me wonder if this is normal. I also don't know it would feel if the clutch was "going out" and have wondered if that would be the case...?

 

[chacaocop]

This thread deviated a little bit from the original title "intermittent knocking"...

I own a 2006 TDI and the same symptom started happening a week ago. First it did it a little bit, then every time it starts. With the windows closed it was just a louder diesel knocking, but today when I opened the hood and listened to the noise without any interference it sound as loud as if two flat pieces of wood where hiting each other and the sound was metal against metal. I only have 93K on it. I stopped driving it and I read that one of the moderators suggested that it could the timing belt stretching. The noise comes from the left side around the area of the timing belt cover, or at least that is the area of where I beleive the sound is created.

Engine works so far. Is there any damage yet? I will be purchasing the timing belt kit the next week or so.

Besides the originator of this thread, has anyone experienced this?

Thanks in advance for your assistance.

 

[chacaocop]

I did replace the timing belt on the 2006 Jetta TDI. When taking the panels off, oil was all over the place which led me to beleive there was a leak. The oil spilled from the dipstick hole which was not inserted properly.

I took the opportunity and also changed the oil.

After that timing belt went fine and knocking was eliminated. I think the problem was likely to be related to low oil levels.

I have one question though. How do I clear the message: "Service now" since I already changed the oil?

 

[chittychittybangbang]

http://www.myturbodiesel.com/1000q/a5/reset-service-light-Jetta.htm