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VW TDI Really Loud #3229656
12/28/13 01:24 AM
12/28/13 01:24 AM
Joined: Feb 2013
Posts: 10,685
Phoenix, AZ
Nick1994 Online content OP
Nick1994  Online Content OP
Joined: Feb 2013
Posts: 10,685
Phoenix, AZ
My aunt has a 2004 VW Beetle TDI 1.9 with 153k miles. It runs fantastic and has plenty of power as always and is always maintained. It had been really loud the last year or two I'd say. I realize it is a diesel but it almost sounds like a little backhoe, not like it runs bad but like a Caterpillar tractor. Especially in parking garages you can hear it. Is it just breaking in? Always dealer serviced as well, and brand of fuel doesn't make a difference.


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: VW TDI Really Loud [Re: Nick1994] #3229676
12/28/13 02:14 AM
12/28/13 02:14 AM
Joined: Sep 2012
Posts: 2,191
VA
bvance554 Offline
bvance554  Offline
Joined: Sep 2012
Posts: 2,191
VA
Everything sounds louder in a parking garage... If it runs fine i'm sure it sounds fine.

Re: VW TDI Really Loud [Re: Nick1994] #3229692
12/28/13 04:31 AM
12/28/13 04:31 AM
Joined: Jun 2002
Posts: 2,706
Southeastern USA
FowVay Offline
FowVay  Offline
Joined: Jun 2002
Posts: 2,706
Southeastern USA
Any CEL's? Some of those vehicles had problematic EGR coolers and they would crack which lead to exhaust leakage and subsequent noise.

A very thorough visual inspection should reveal any external issues.

Don't rule out the possibility of the valvetrain having issues on those engines either. A worn camshaft will lead to noisy operation without triggering a CEL. It's usually the exhaust lobe that wears out of specification.

There are my two guesses... smile


Quaker State across the board.
Re: VW TDI Really Loud [Re: Nick1994] #3229700
12/28/13 05:57 AM
12/28/13 05:57 AM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline
Joined: Sep 2012
Posts: 2,221
London, England
I have noticed over the years that some high mileage diesels exhibit this phenomena.

Noticed it first many years ago on a mates Peugeot 306 diesel.

And have also noticed on more than one high mileage Passat

Always wondered why this was.

Perhaps it is just some form of resonance.

Caused by cumilative wear and tear.

Would be nice to actually know what caused it.

Though i always avoided cars at the auction that had this tendancy as i figured they may have had a hard life.


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: VW TDI Really Loud [Re: Nick1994] #3229753
12/28/13 08:03 AM
12/28/13 08:03 AM
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
Many VW diesel engines use multiple injection "pulses" to keep idle and low RPM operation quiet. It's possible that the injectors are not spraying well during the "micro" multiple injection cycles at idle/low RPM.


People who count on their fingers should maintain a discreet silence.
Re: VW TDI Really Loud [Re: Cujet] #3229825
12/28/13 09:20 AM
12/28/13 09:20 AM
Joined: Aug 2004
Posts: 1,465
San Antonio, Texas
sasilverbullet Offline
sasilverbullet  Offline
Joined: Aug 2004
Posts: 1,465
San Antonio, Texas
Originally Posted By: Cujet
Many VW diesel engines use multiple injection "pulses" to keep idle and low RPM operation quiet. It's possible that the injectors are not spraying well during the "micro" multiple injection cycles at idle/low RPM.


If I'm not mistaken the 04's didn't have that technology. The newer ones do though.


03 Porsche 911 Liqui Moly Leichtlauf High Tech 5w-40 & Mahle filter
14 Honda Accord 4dr EX-L 4cyl-M1 0W-20 & WIX XP
02 Chevy 5.7L van-GTX HM 10W-40 & WIX filter
Re: VW TDI Really Loud [Re: Nick1994] #3229852
12/28/13 09:50 AM
12/28/13 09:50 AM
Joined: Feb 2012
Posts: 70
NJ
irad Offline
irad  Offline
Joined: Feb 2012
Posts: 70
NJ
Check the flex joint on the exhaust pipe.

Re: VW TDI Really Loud [Re: sasilverbullet] #3229956
12/28/13 12:13 PM
12/28/13 12:13 PM
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
Originally Posted By: sasilverbullet
Originally Posted By: Cujet
Many VW diesel engines use multiple injection "pulses" to keep idle and low RPM operation quiet. It's possible that the injectors are not spraying well during the "micro" multiple injection cycles at idle/low RPM.


If I'm not mistaken the 04's didn't have that technology. The newer ones do though.


The 2004 should be the 1.9L BEW (AKA PD) engine. The PD engine does have the unit injector. The unit injector is actuated directly by the camshaft, via a roller, and the injection cycle is controlled by bleeding off the fuel from the "unit injector". The PD engine does have 5 or 6 separate injection pulses at idle.


People who count on their fingers should maintain a discreet silence.
Re: VW TDI Really Loud [Re: Cujet] #3230018
12/28/13 01:27 PM
12/28/13 01:27 PM
Joined: May 2005
Posts: 3,650
SF Bay Area
y_p_w Offline
y_p_w  Offline
Joined: May 2005
Posts: 3,650
SF Bay Area
Originally Posted By: Cujet
Originally Posted By: sasilverbullet
Originally Posted By: Cujet
Many VW diesel engines use multiple injection "pulses" to keep idle and low RPM operation quiet. It's possible that the injectors are not spraying well during the "micro" multiple injection cycles at idle/low RPM.


If I'm not mistaken the 04's didn't have that technology. The newer ones do though.


The 2004 should be the 1.9L BEW (AKA PD) engine. The PD engine does have the unit injector. The unit injector is actuated directly by the camshaft, via a roller, and the injection cycle is controlled by bleeding off the fuel from the "unit injector". The PD engine does have 5 or 6 separate injection pulses at idle.

Ah - the pumpe duse TDI. That's notorious for VW's requirement of a 5W-40 motor oil meeting their 505.01 spec.

The one thing I heard about that oil was speculation that too frequent oil changes might actually result in faster wear of the cams. Supposedly one or two cams would get worn down. Nobody can pinpoint exactly why, but it could be a matter of the wrong oil being used as well as the design where certain cams may be getting less oil.



http://www.myturbodiesel.com/1000q/multi/camshaft-inspection-replace-vw-tdi.htm

Re: VW TDI Really Loud [Re: y_p_w] #3230021
12/28/13 01:35 PM
12/28/13 01:35 PM
Joined: Feb 2013
Posts: 10,685
Phoenix, AZ
Nick1994 Online content OP
Nick1994  Online Content OP
Joined: Feb 2013
Posts: 10,685
Phoenix, AZ
Well I hope it's got the proper oil spec, always serviced at the same VW dealer, at 10k mile OCI's


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: VW TDI Really Loud [Re: irad] #3230115
12/28/13 04:46 PM
12/28/13 04:46 PM
Joined: Mar 2012
Posts: 5,133
chicago, Illinois
antiqueshell Offline
antiqueshell  Offline
Joined: Mar 2012
Posts: 5,133
chicago, Illinois
Originally Posted By: irad
Check the flex joint on the exhaust pipe.


I agree this is a very common wear item.


As for the dealer putting the specified VW
oil in there....very iffy. 50/50 chance you received the correct spec or just some ordinary 5w-30.


I would actually go back and check your work orders if you kept them to see if they printed the oil spec there.

Re: VW TDI Really Loud [Re: Nick1994] #3230584
12/29/13 08:08 AM
12/29/13 08:08 AM
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,426
Jupiter, Florida
On my PD powered Jetta, I used M1 5W-40 TDT oil, changed at 5000 miles. The UOA results were far, far better "wear metals per 1000 miles" done that way.

Somewhere on the TDI forums, others determined the very same thing, with TDT being a favorite oil.

Last edited by Cujet; 12/29/13 08:09 AM.

People who count on their fingers should maintain a discreet silence.
Re: VW TDI Really Loud [Re: Nick1994] #3231694
12/30/13 10:39 AM
12/30/13 10:39 AM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline
Joined: Sep 2012
Posts: 2,221
London, England
Mobil TDT is a truck oil isn't it?

Must be fairly robust stuff


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: VW TDI Really Loud [Re: Nick1994] #3232166
12/30/13 07:25 PM
12/30/13 07:25 PM
Joined: Sep 2007
Posts: 8,598
Florida
artificialist Offline
artificialist  Offline
Joined: Sep 2007
Posts: 8,598
Florida
Any increases in smoke?

I have been told a diesel with worn injector nozzles will create more noise and more smoke due to bad fuel atomization.

I am not sure if the 2004 Beetle had PD injectors, or if it used an electronic distributor pump.


2010 Lancer Ralliart Sportback
Re: VW TDI Really Loud [Re: Nick1994] #3232191
12/30/13 07:42 PM
12/30/13 07:42 PM
Joined: Nov 2008
Posts: 12,527
NH
supton Offline
supton  Offline
Joined: Nov 2008
Posts: 12,527
NH
2004 would have the PD injectors.


2011 Toyota Camry, base, 2.5L/6MT, 163k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 144k, ours
1999 Toyota Camry LE, 2.2L/4AT, 190k, his
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