AVF Motor Strömungsgeräusche bis ca 2000 U/Min | Posts 16+

corryfan wrote:

@ulf: The speed increase works even with the "default setting"! What exactly is happening there?

Everything is in the link I mentioned above -> in the section "In this process, the VTG operates approximately every 10 seconds..."

Quote:

It doesn't quite fit the topic, but does anyone know what "status 2 or 4 or 6" means for the PD elements?

This issue was recently addressed in the search function.

Regarding the noises. (Passat AVF)
It could also be related to the air intake system or the air filter housing.

a) Carefully check the secure connection of the intake pipe to the connector on the air filter housing.
Possibly, replacement parts.
b) Optimized air filter lower housing: 3B0 129 614

c) Adjust the motor/transmission mount, precisely adjust the torque support, and correctly align the exhaust system. (This is particularly important when experiencing low-frequency rumbling or booming noises between 1800-2550 RPM under partial load.)

Optimized sealing rings: (list)

OLD > New

1J0 145 117 J/K >> 3C0 145 117
6X0 145 117 >> 3C0 145 117 B
070 145 117 A >> 3C0 145 117 B
6Q0 145 117 / A >> 3C0 145 117 D
1J0 145 117 L/M >> 3C0145 117 F
1J0 145 117 N/P >> 3C0 145 117 H
7L6 145 117 >> 3C0 145 117 K

The PDE status should always be the same (and not deviate from 0) on all 4 units when they are in idle mode.

018,0, Status: Solenoid valves for pump/nozzle (BIP).
; 000 - Error-free regulation.
; 002 - Control during startup.
; 004 - Small injection volume or MV (minimum volume)
; 008 - Maximum current reached.
; 016 - BIP outside of regular operating window.
; 032 - Sampling rate too low.
; 064 - Transformation error.
; 128 - GDP calculation not possible.

Hello!
a) Since when has this replacement part been available under this part number? Is there any written documentation about it? Is this only the lower part of the air filter housing? Does this fit the old air intake elbow?

'Regarding the torque support for the gearbox (Passat AVF): Where is it located, and how is it adjusted? Is there a repair manual available?'

Here's the translation:

'One more quick question about the Passat (AVF). What are the following parts used for?'
8D0 129 636B Sealing strip.
3B0 198 614 - Retrofit kit for air filter.
Sind das Dinge die erst später in die Serie eingeflossen sind? Meiner hat die Teile def. NOT!

I want to investigate the vibrations in my AVF (6-speed) engine. They have always been present and haven't improved or worsened despite three replacements of the dual-mass flywheel, two replacements of the exhaust manifold (including the catalytic converter), and one replacement of the rear silencer. The vibrations are pervasive and feel like holding a vibrating phone. However, they only occur between 1600 and 1900 RPM. You can feel them in the steering wheel, the seat, and especially the gear lever. It doesn't matter if you're driving at full throttle or slowly increasing the RPM. In this range, it vibrates like a phone. Is this normal for a 3BG pump-injector engine?

Thank you.

Greetings.

hello everyone,

Okay, my system seems to be airtight, at least as far as the following connections are concerned (I checked them by hand while the engine was running at a slightly higher speed, hopefully that's sufficient).
- Hose, upper left, in front of the loader.
- Plastic tubing connecting to the liquid cooling system (LCS), as well as the plastic tubing itself.
- Hose from the low-level coolant (LLC) to the steel pipe at the bottom.
- Connect the hose from the loader to the steel pipe at the bottom.

Why does everything always seem to break? The car is practically brand new!
Perhaps the noises are actually 'normal,' but does anyone else experience this in their Passat?

@vagtuning:

a) Carefully check the secure connection of the intake pipe to the connector on the air filter housing.
Possibly spare part.

What exactly do you mean by 'securing'? The connection between the charging cable and the air intake manifold is secured with clamps in my setup.

@96kwTDI:
At work, I sometimes drive a V8 4.2 TDI in an A8L. Okay, it doesn't vibrate as much as ours. But I have to say, the AVF engine in a Passat doesn't have that either! So what you're describing sounds like noticeable vibrations, which I don't experience. I do notice a bit of vibration when the car is stationary with a gear engaged (TT5 transmission), which causes the headlight to flicker up and down like in a truck, but it's not really bothersome.

Do you at least also have my tinnitus ?

Hi!
'These are NOT vibrations in the usual sense; it's a subtle tingling, like a mobile phone with vibration call. The injectors vibrate quite intensely by default. This is due to the longitudinal installation of the engine and injectors. In a Golf, for example, the injectors are MUCH quieter!'

Flow noises? Only the turbo whistle when it kicks in like a cheetah . If you stop hearing that, THEN I would be seriously worried .

Greetings.

I'm referring to parts 3, 20, and 20a... also, the attachment of part 3 to the air filter housing. That's why the lower part was also replaced, because that connection was causing problems.

Hello corryfan,

"I also have the flow noise in my A4, but it's noticeable from around 1500 RPM (only when the radio is off and the ventilation is on a low setting). It's most noticeable when driving uphill with the accelerator fully pressed, as the engine can only rev up slowly. The noise becomes quieter as the RPM increases and is drowned out by other sounds at 2500 RPM."
The car has approximately 78,000 kilometers on the odometer.

Best regards, Karsten.

@vagtuning
And could you please also tell me WHEN this change occurred and whether it falls under the chapter 'Technical Troubleshooting'? If so, then there must be documentation or a reference number associated with it. I need something concrete so that I can further investigate this . Simply saying 'there's something new' without any indication of the problem doesn't come across very well.

Thank you.

Greetings.

There is definitely a TPL (Third-Party Logistics provider) available, and your dealer should be able to find one for you.

Hi!
And approximately when was that, and what is the name of the TPL? Is that a secret, or do you not know?

Greetings.

Hello everyone.

The story about the air filter box and the intake manifold is a well-known issue. The should please take a look at the HST. The noises that are caused by this typically occur around 1500 RPM.

Furthermore, there are still some minor issues with the engine mounts at VW/Audi. It is recommended to first loosen the engine mounts and allow the engine to "settle" without any stress . This is according to a technical service representative from VW.

Regarding the flow noises, they are to a certain extent quite normal. However, you could and inquire whether the turbocharger could still be reconditioned under the warranty period, citing the reason of increased oil consumption.
If he thinks about customer satisfaction and his sales, he will do it.

Best regards,
Matte.

I looked into the topic of 'Hutze' today, but I couldn't find anything conclusive.
What can you see on these parts?
'Part 3 on part 14 of my car has this sealant applied. Is this a feature that was introduced as an improvement starting with a certain production year? My car is from early 2004, so I think it's likely that this feature was already included.'

at KarstenH:
I'm glad to hear that I'm not the only one experiencing these noises. 1500 RPM might be a good starting point, as I'm experiencing it up to around 2500-3000 RPM.


What is a 'HST'? Elsa?

Hi!
Could you please take a picture of that? Or, which part of the drawing is that supposed to be? Sealant? That sounds adventurous .

Greetings.

Hi.
Part 3 features a kind of 'concealed' attachment mechanism on the filter housings (14).
There's a rubbery, slightly sticky sealant inside/between the two parts. I'm not sure if it's supposed to be there from the factory or if my predecessor already applied it.

'Hst' stands for 'Handbuch Service Technik,' which translates to 'Service Technology Manual.'
There's a Technical Problem Solution (TPL) document available on the general topic, but not specifically for my sealant. It deals with modified filter housings. The TPL would likely be relatively 'new,' probably dating back to around 2002/2003.

My noises are still there, and nothing has changed about that so far. I'm starting to think that's normal .