The crankshaft is aligned with the marking on the gear wheel as well as with the marking behind the belt disc on the nose of the oil pump housing, the transmission-side grooves in the camshafts curtailed. If I now put on the timing belt, I can turn the motor less than a quarter of a revolution on the crankshaft until it blocks. The camshafts do only half a tur per crankshaft rotation. Is there a more reliable and less dangerous method for my motor than to solve this via try and error? A friend said that I might only have to overcome the compression in the cylinder, i.e. turn at the KW with more force. However, I have no desire to bend the valves. Now I have found a few cases in which the B5252S is the alignment of the valves. but unfortunately no solution to my problem. However, the local Volvo dealer does not know this phenomenon and according to his own statement uses the same camshaft locking tool for all 850 gasoline engines. For tips I would be really grateful. Greetings, kc.