Hello, I used to build my motor apart. I made head/vettel cover seal and timing belts…. since then I have felt that the motor does not pull properly… and today I also noticed that at about 5500 of the brentern uses I am the opinion that otherwise came only at 6200….. I checked all positions again and could not find a mistake it seems that the motor to 98% on ot is only the marking on the crankshaft is about 1 cm too far … .. according to my uncle (Kfz master at vw audio) this shouldn’t be the cause.. did you still have an idea what that can be=?