Timing Belt Inspection: 1.9L TDI PD (AVB)

Good day.
"The timing belt on my 2001 Passat 3BG is supposed to be replaced every 90,000 km, and it has now reached 95,000 km over a period of 7 years, mostly driven on country roads with low engine speeds. Based on the picture, can you tell if it still looks good? I've read that the tensioner pulleys can fail and quickly damage the timing belt. Since there are no visible signs of wear, I assume everything is still okay. I'm not planning to replace the belt yet, as I'm not sure if a head gasket replacement might also be necessary, and I'll regularly check the belt for any changes. Perhaps someone has experience with what a timing belt looks like just before it breaks."
Best regards,
Stefan

No one will say anything to you, especially because of your age. And no one can see inside.

Do whatever you like; the only truly helpful advice is: change something. Everything else is just meant to ease your conscience, and like playing the lottery, it might work out, but it doesn't have to.

Thank you for the response. It's generally not worth making compromises in such situations, as is well known. However, with a 16-year-old car, the financial risk is manageable. I'm going to trust that the belt itself hasn't lost its strength, as it doesn't appear porous or cracked. Furthermore, the car is driven very carefully 90% of the time, which is probably why the timing belt still looks so good.
I would still appreciate any further feedback.
Best regards,
Stefan

I recently asked the same question. I also replaced the water pump again. This time, I noticed that the water pump was about to fail.

Especially with PD TDI engines, one should not compromise and should rather replace the timing belt, along with the pulleys and water pump, prematurely, as the forces acting on these components are significantly higher than in "normal" TDI engines.

Gentle driving has the same effect as aggressive driving on the timing belt, which is nothing; it can happen during the starting process or when accelerating, when the forces are at their highest. Saving those 75 euros is a false economy. -- My opinion.

The forces should ideally be at their highest when the engine is revved up quickly, meaning the engine is accelerated to higher RPMs in a short time than it could achieve on its own by simply pressing the accelerator. I understand that the pump-injector elements place increased demands on the timing belt. However, this higher stress should ideally be taken into account during the design process, so that in the simplest case, the belt is simply made wider than it is in other engines. I believe that a gentle driving style increases the lifespan of the belt, simply because the engine makes fewer revolutions per distance traveled, meaning the belt is redirected less often, doesn't get as hot, and experiences less acceleration forces.
Unfortunately, there are few accounts available from people who have experienced a belt failure at a specific mileage, and what the belts looked like immediately before the failure. I haven't found any positive experiences either; it would be interesting to know, for example, whether a belt can actually reach twice the recommended mileage.

Hi Otto²!

To begin with, I would like to echo what my predecessors have said, especially Rüdi!

To add to this, I would like to point out that, apart from the usual wear marks, the PD-ZR cartridges appear to be in perfect condition until they fail completely, and it is often impossible to tell from the outside whether or when they will break.
So, it's not like the teeth and the back of the body would start cracking and falling off long before, only to reach a point a few thousand kilometers later where things inevitably happen.

It seems to me that you have already manifested your answer; probably even long before you asked the question here.
Therefore, either be "worse" than everyone else, let things happen as they may, and report it to posterity online.
Alternatively, you could take these answers to heart if things aren't quite working out with logic.

Ah, and one more thing: Perhaps there are so few articles online about ZR tear tests precisely because the author would have to admit that they weren't much smarter than everyone else, and that they now have to pay a price – more than ten times the amount and effort – in the form of "tuition" for that knowledge.
...you certainly wouldn't be the one to start a thread with something like "YES! I'm stupid!", would you?

Best regards from Munich!

Hello Dieselbear,
Thank you for your detailed explanation; I found some of it to be very useful.
The belts appear to be in good condition and show no visible signs of wear or age on the PD TDI engine. This is already valuable additional information. Online, you often find belts that are already quite torn but still functioning, which leads to the assumption that a belt that looks brand new hopefully won't break anytime soon.

So, I'll go ahead and order a timing belt kit now. Unfortunately, there's a price difference based on the vehicle's year of manufacture (more expensive for cars up to 2002). So far, I've found the most complete and affordable offer from Conti, which includes all the tensioners, dampers, and the water pump for €139.99, distributed by ATP. Do you know of any cheaper offers?

Best regards,
Stefan

Evening.
"He who buys cheap, buys..."

Small incentive to order online at a low price.
A friend of mine did something similar once, and it was definitely cheap. After 5,000 km, his car broke down at the workshop with noises coming from the engine compartment, caused by a counterfeit tensioner pulley.
The timing belt was torn halfway through.
I ended up paying 50€ more than he did for a set of Conti tires, and I bought them from a local parts dealer!
You can buy it wherever you want .