OEM-Pleuellagerlieferant für VAG? | Posts 16+

Hello everyone,

"Does anyone know the diameters of the PD crank axle (main bearing and crankpin)?"

For the "standard" TDIs, the main bearings have a diameter of 54mm, and the crankshaft journals have a diameter of 47.8mm.
I was actually wondering if I should just get the connecting rod bearing shells from the PD engine, as they are likely to be more wear-resistant and have a higher load capacity than the ones from the AHF/ASV engines.
However, I was unable to find any information about the diameter.

However, I find the price differences quite strange.

PD storage containers cost approximately 7 EUR each.
The lower bearing shells of older TDIs (AGR, AHF, ALH, ASV) also fall within this price range. However, the upper bearing shells, which are subject to high loads, are manufactured as sputtered bearings in the AHF and ASV models, and each piece is said to cost approximately 24 EUR .

Now I'm wondering if the PDs simply increased the shaft diameter to achieve the same stability using conventional and cheaper bearings, or if the PDs generally have SPUTTER bearings, which, however, can be manufactured more cheaply?

Who knows?

Regards,
Alex.

Hello everyone!

After doing some research on this homepage , I discovered that there are indeed PD engines that have identical crankshaft dimensions (54mm main bearing and 47.8mm connecting rod bearing). These include, for example, the ATD, AJM, AVF, and AVB engines.
However, ASZ and ARL engines likely have a connecting rod bearing diameter of 50.9mm .

So far, so good. Considering the fact that the aforementioned PDs (presumably referring to specific engine components) deliver significantly more torque to the crankshaft (KW) compared to the VP TDIs, the stress (surface pressure) on the connecting rod bearings is correspondingly higher.
It surprises me even more that there is no mention of sputter bearings in that document. Furthermore, these bearing shells are very inexpensive compared to the sputter bearing shells used by AHF and ASV.

What are the differences in the connecting rods? Do all PD engines already have trapezoidal connecting rods?

I'm interested in knowing if it would be possible, in principle, to install PD storage trays in the AGR (presumably referring to a specific vehicle model or system), since at least the diameters and widths are identical.

Who knows about that?

Regards,
Alex.

You usually change those things based on the make and model of the car, so it's often difficult to find someone with experience in that area. It would certainly be interesting, though...
If they weren't so expensive, I would just try them out.

To the best of my knowledge, all PD models have trapezoidal connecting rods.

Regards.

What about the break-in period for the connecting rod bearings?
Are there any specific methods or mileage limits to consider?
Oil change at a shorter interval?
Or is it simply 'install,' 'start'?


Sure, here is the translation of the text from German to English:

'lg.'
'Best regards.'