Now this year I have disassembled the whole Kladderadatsch because of another thing, and build everything up with a new timing belt (even though I didn't drive much, but once it is down...) again. I tension the timing belt again with the eccentric and do not get below 141mm tensioner length at best!
That was the point where I seriously doubted myself - how can that be? Are the belts that I always order more qualitatively located at the bottom? Is the damper in the bucket? Has a pulley been locked?
Well, I guess you throw the aggregate anyway and see if the strap is still curtailed by magic.
Said, done: the damper comes, no matter how often I adjust the eccentric and still release the camshaft wheels, just not to the required length.
After I left the fat guy for a few days and in the meantime felt 2 hours. just stared into the vestibule, I come up with the idea to measure the individual Riementrumm components with a measuring slide. The old parts that I picked up from the last change of belt in a cardboard box, I then compared with the installed ones.
In fact, the belt wheel of the built-in GK pump has a diameter of 66mm, the old pump has one of 74mm! Of course, it is clear that the clamping damper has a different length at the same eccentric position. For the test I clamped a hexagon with 5mm diameter between the pump and the belt, and see: the length of the damper could be adjusted well.
After a short search via Gurgel I find the following thread:
http://www.audiv8.com/forum/printthread.php?Cat=&Board=v8engine_ger&main=344791&type=thread
Aha, all right, there are actually different versions, the pump with the smaller belt wheel seems to be from the S6 (AEC).
Part numbers:
077 121 004 GX - Audi V8 (ABH)
077 121 004 HX - Audi S6 (AEC)
I then compared the individual components of the Riementrumm on the explosion drawings of the two engines, since I suspected that the AEC might have a different eccentricity than the ABH, but a pustic cake.
Now the big question for everyone who drives an AEC or simply the AEC pump in the ABH block: How do you get the damper to the required length? As long as you buy a belt until there's a suitable one?
