Wie lange hält ein Zahnriemen wirklich? | Posts 16+

Quote:

So, bei meinem AFN (97er A4) wird die Wasserpumpe durch den Zahnriemen angetrieben.

Then you must have a very special AFN, as far as I know, there isn't one like it.

The component driven by the timing belt is the intermediate shaft; the oil pump and the U-shaped oil pump are attached to it. The pump is driven by the KR-belt.

Greetings,
Dieter

Hello,

Okay, you're right. I remember. The water pump is driven by the V-ribbed belt.

Sorry,

Of course, the water pump is driven from the back of the camshaft belt, even in my AFN.

Greetings
Thomas

I bought my Renault with the F9Q engine when it had a broken timing belt. All the tensioners were in place, but the previous owner believed that either the timing belt needed to be replaced every 120,000 km OR every 5 years. He preferred the 120,000 km interval, which he hadn't reached after 8 years. However, the engine then failed at 94,000 km, after 8 years... However, the motor does not have an automatic tensioner!

Yo. Lovely old topic

Realistically, one would need a flexible service interval for the timing belt, similar to what is now common for oil change intervals. The timing belt interval makes no difference, whether a lot of driving is done in the city, meaning a lot of idling at traffic lights and driving in low gears, or whether a lot of long-distance driving is done, usually in fifth gear. The time factor certainly plays a role, but in my opinion, not as much as one might think, since the fibers are usually made of glass fibers, which should actually be insensitive to aging. I also believe that it is definitely possible to produce timing belts with a lifespan of 500,000 km, however, there are so many components in timing belt drives, such as tensioners and guides, which of course also have alternatives.
A few weeks ago, a friend of mine pointed out to me that his car probably needed a timing belt replacement. He himself had never replaced it, but he had already driven the car for 300,000 km. This meant that the timing belt was at least 300,000 km old. Apart from a slight oil film on the tensioner, it looked quite good. Another friend, who didn't want to pay for any more car maintenance because the resale value of his Alfa Romeo 156 was lower than the cost of maintenance, opted out of oil and timing belt changes. Nevertheless, he drove this car for another 200,000 km before selling it in Romania.
The problem with changing the timing belt is simply that there are no issues related to wear and tear, but rather, it's either intact or it's torn, with the well-known consequences.
And nobody wants to take on that responsibility.
It's strange that, after 120 years of engine development, there isn't a truly definitive solution. The innovative bicycle chains in the TSI engines, as well as Ford's oil-lubricated timing belts, are particularly problematic

The aforementioned bicycle chains are now used by all manufacturers, with the resulting consequences.

The problem is that it's claimed that timing chains don't need an adjustment interval, and I'd prefer a timing belt that I have to replace every 90,000 km, for example.

Last week, I replaced the timing belt on my Seat 2.0 TDI. Engine: CRMB....But not because it was worn or old. The water pump caused the failure. Okay, now it has 180,000 km on the odometer and is 5.5 years old.