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Discussion Starter #1
I recently purchased a Golf Wagon TDI (my first diesel) with DSG and I noticed engine vibrations that are more pronounced at low rpm (1000-1400) but can be felt up to 1800 rpm (like a buzz). Vibrations become worse as the engine warms up. Has anyone else experienced this? Is it normal for a diesel?
 

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Hopefully others can comment on the buzzing that gets worse as the engine warms up. Normally the engine gets smoother as it warms up.

It's definitely not normal for a diesel. If you were lugging it the DSG should upshift.
 

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Discussion Starter #3
To clarify it a bit, when the engine is cold I feel some vibration between 1000-1400 rpm. Dealer said it is normal. But after the engine warms up then I feel the buzz under acceleration all the way to 1800 rpm which is annoying. In normal city traffic DSG tends to keep the engine at low rpm.
 

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I did go and tested another one. It did not vibrate like mine. In my view the car has a problem but I did not take it in for service yet. The dealer where I purchased the car said that I can bring it in for service but if they test the car and nothing wrong is found then they would charge me for the time the technician spent. That sounds ridiculous since the car is under warranty but I'll call VW Canada to confirm first.
 

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Discussion Starter #6
Engine vibration update

I took the car in for service. The technician checked the car for error codes and none were found. He drove the car and said the vibration is normal. I was not charged for the inspection and the dealership gave my car a free wash. In any case, I still believe there is something wrong with the car because I drove other TDI cars and I don't feel the same vibration. Couple of strange things I noticed:
* vibration is stronger when the engine warms up.
* vibration sometimes disappears completely when driving at a constant speed (most of the time around 75 km/h, but I've noticed it once at 50Km/h) but I can't reproduce it at will.
On a side note, I get an average of 35mpg (6.7 l/100Km) fuel economy in mixed driving which seems a bit high. The winter must be a factor.
 

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Also feel a vibration

I received delivery on my TDI Wagen DSG on 2/1 and I also feel a vibration coming through the floor to my feet. I haven't compared it to RPM or speed yet and I haven't decided if it's abnormal or just idiosyncratic of the TDI.
 

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I received delivery on my TDI Wagen DSG on 2/1 and I also feel a vibration coming through the floor to my feet. I haven't compared it to RPM or speed yet and I haven't decided if it's abnormal or just idiosyncratic of the TDI.
I too am getting vibration when I accelerate from a steady RPM. It usually happens in the 1400-1800 RPM range which is 55-65 MPH on the highway. It almost feels like an engine miss. Kind of like the feeling when my 06 GTI was having one of its numerous coil failures. Yes, I know this is not possible with a TDI but that is what it resembles.
 

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If you refer to something that is similar to what I described in my post on November 1st, 2009 - http://www.myturbodiesel.com/forum/showthread.php?t=1907, then I have a good news for you. Well, sort of a good news.

I now have over 11,000km (~7,000 miles) on the car and the problem has gone away completely all by itself. I no longer have any resonance. I suspect that exhaust components vibrate against each other while they are brand spanking new and clean. I think that after they go through numerous heat cycles, and get dirty with exhaust soot they sort of fuse to each other, and no longer vibrate and resonate so violently.

I still think that this is a design issue, and I still think VW will do absolutely nothing about it on existing cars.
 

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good info!

i have this low end vibration/buzz too.. just picked up the car on sunday and noticed it the other day. hopefully, it'll go away after a couple thousand miles.
 

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I have the similar vibration on my new 2010 TDI with MT. It now has 1900 miles on it, however the vibration level hasn't changed yet. I like to know if any one of you found the remedy to eliminate this annoying problem? I will address my problem to the dealer when I take the car for courtesy inspection, which is in a month. Did any one of you who had the vibration was able to get your car fixed? if so, what was causing the vibraion? Engine mount, harmonic balancer etc.
 

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Discussion Starter #13
I have 24,000Km on my 2010 TDI and engine vibration is worse than ever. I intend to ask VW dealership to look into the problem next time I go for service @ 30K. It is not only at low rpm anymore. I can feel the vibration all the way to 1800rpm and then over 2200rpm. The engine is smoother between 1800-2200 rpm for some reason. I hope VW can fix it otherwise I would have to sell it. I heard Mazda will bring a 2.2L diesel in 2012 (Mazda 6). Maybe that one will be smoother or the other option I'm thinking about is to buy a used E320 CDI.
 

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TDImania,
Pls let me know about your experience with the dealer as to what type of fix they will suggest. My 2010 Jetta with 3800 mileage does the similar vibration at 1200 rpm and between 2100 and 2350 rpm. It does this at every gear so it's not vehicle speed related. The dealer as usual says this is normal because it's diesel, which is far from truth, my previous 2009 Jetta TDI had none of this vibration issues at all.
 

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2.0 TDI engine resonance

Regarding the 2009 vs 2010 Jetta TDI, keep in mind that VW changed the MT gearing in 2010—made it a lot taller in every gear except first. VW was on a quest to try to up the EPA test numbers (they got one whole additional MPG on the highway cycle!), and they may have changed other engine control parameters as well, as evidenced by increased problems with stalling on launch, oddball random power drops, etc.

I have a 2010 Jetta TDI Sedan, manual transmission, manufactured 8/10. About 2500 miles on it. The engine has a resonance starting at about 1050 and through to about 1300 rpm. This appears to be a true resonance; it is revealed through proper and gradual acceleration through the gears. I have not noticed any other resonances up through rpm, which is as fast as I have spun it to date—and steady cruise on the highway, at that. I rarely need to get it over 1800 or so in normal acceleration. The engine revs smoothly from about 1400 rpm or so, up.

If you drive this car for maximum fuel economy, you will inevitably find yourself in city traffic at steady cruise right in the resonance band. You can downshift to raise rpm out of this resonance point, but even after carefully modulating the throttle, you will be using 10-15% more fuel in the lower gear--most of the time. As is true of most resonance bands, increasing engine loading in the band increases the audible volume of the resonance; i.e., trying to modestly accelerate out of it without downshifting. And, when the engine and hence the engine mounts get warm, the resonance is worse since warm mounts transmit more of the vibration into the body.

There is a stretch of road I drive regularly, 45mph speed limit strictly enforced, with a slight grade for a mile. In 6th, I'm right on the resonance peak at 1200 rpm. If I downshift to 5th, I'm out of the resonance but my fuel economy drops from 45 to 38, even after carefully feathering the throttle post downshift.

Now, there are occasions where downshifting into 5th from 6th to avoid the resonance point will yield BETTER economy, but that is usually when you are below 1000 rpm in 6th. By and large with this engine you invoke significantly more fuel use at steady speed/light throttle in the lower gear at 1400+ rpm, then in 6th at 1100-1200 rpm.

Even my wife, who drives more 'normally' than I, complains of hitting the resonance too often in city traffic, and having to shift around it.

Ironically, this 2.0 TDI engine reminds me of the old 1.6 engine (c.1979 to 1992), which had no balance shafts. The 1.6 had a resonance around 1500 rpm that made 5th gear at a steady 35mph very unpleasant, even though the engine otherwise was efficient at that speed, and could even accelerate modestly from there without protest, without downshifting.

With the next diesel after the 1.6, the first 'TDI', the 1.9 VE engine, VW eliminated all resonance points through at least 3500rpm (I've never driven my 02 Golf beyond that). No resonance, none, nada.

But, VW has managed to reintroduce resonance with the 2.0 TDI.

I test drove a 2011 Golf TDI recently, and it had the same resonance, though it seemed very slightly more muted in the Golf.

I’m not even going to approach the dealer with the problem in my Jetta; I know he will say it is normal and blow me off. Been there, done that with other issues on VW cars, too many times. That’s why US VW service ranks at the very bottom of the barrel. And anyway, I suspect it IS normal.

We can only hope that the next 4-cylinder TDI, purportedly in development to meet the coming super stringent Euro emissions, will once again be resonance free. It can be done...the very first TDI is 'living' proof!

In the meantime, I believe we are stuck with a lapse in VW/Audi engineering of the first order--a resonance in a balance-shafted engine that thwarts running the diesel at optimum economy in light-load conditions—and makes acceleration through the gears for the ‘normal’ drivers less than completely joyful—as it could be otherwise.
 

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The CJAA engine used from 2010 ( or 2011 ) up has no balancing shafts, I believe all years (CR engine) before had them. The oil pump is chain driven in CJAA as of now, and the entire balancing shaft assembly has been eliminated. Probably because the older design had reliability problem. I think they once went to gear driven balancing shaft/ oil pump and that was ok... not sure why going back to chain again.

Like some said, VW doesn't seem to keep their notes between each revisions... Diesel has more vibration by nature due to the high compression ratio, removing balancing shaft... I don't know, I thought 4 cylinder gasoline engines without balancing shaft was rough enough.

This COULD explain the problem. Mine does it too, although for me, taking off from a standing still is where it bothers me most, 1200 is where I slip the clutch and it seems to vibrate the most, clutch slipping seems to amplify the affect if it's "light", reduces it if I give it quite a bit of bite. The 2012 DSG I test drove didn't have it, or significantly less at least, I attributed that to lighter DMF and wet clutch.
 

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I recently purchased a Golf Wagon TDI (my first diesel) with DSG and I noticed engine vibrations that are more pronounced at low rpm (1000-1400) but can be felt up to 1800 rpm (like a buzz). Vibrations become worse as the engine warms up. Has anyone else experienced this? Is it normal for a diesel?
Neither my 2011 TDI Jetta DSG, or my 2012 TDI Golf 6MT have the Vibration you describe. They both had/have plenty of other issues though....
My Manual GOlf does make a rumbling/vibration like noise when I engage the clutch in 1st and R from a stop only. It makes a noise, but I can't feel the vibration...

VW dealers are so quick to push everything off as "normal" even when it is not. It sounds like things are the same in Canada as well. They must really not like doing warranty work for some reason. I took my Golf in to the dealer because my gearshift was shaking violently in 2nd and 4th. Of course they wasted a day and told me it was normal. I had to complain to the Service Manager, and take him for a ride and reproduce it for him, before they did anything about it. Finally the acknowledged it was an issue, and finally fixed it after 4 days.... They fixed it, but I keep finding missing parts, and things they didn't put back together correctly. Seriously, why does VW service suck so bad across the board, even in other countries!?!
 

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Neither my 2011 TDI Jetta DSG, or my 2012 TDI Golf 6MT have the Vibration you describe. They both had/have plenty of other issues though....
My Manual GOlf does make a rumbling/vibration like noise when I engage the clutch in 1st and R from a stop only. It makes a noise, but I can't feel the vibration...

VW dealers are so quick to push everything off as "normal" even when it is not. It sounds like things are the same in Canada as well. They must really not like doing warranty work for some reason. I took my Golf in to the dealer because my gearshift was shaking violently in 2nd and 4th. Of course they wasted a day and told me it was normal. I had to complain to the Service Manager, and take him for a ride and reproduce it for him, before they did anything about it. Finally the acknowledged it was an issue, and finally fixed it after 4 days.... They fixed it, but I keep finding missing parts, and things they didn't put back together correctly. Seriously, why does VW service suck so bad across the board, even in other countries!?!
Don't get me started about the car coming back with half the bolts missing from whatever was removed during the repair...werd

As far as the resonance goes, I'm wondering if it's because of the fuel hard pipes going into the injectors? IIRC there was a recall for that problem, just don't remember how recent it was.
 
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