Hello people, Hello screwdriver !!!!! I could use a few tips regarding my engine of the 3L X30XE and please only from screwdrivers who really understand something about it. The problem is that it only starts to crack at 2-2500 rpm. In idle and over 2500 revolutions it is gone. The steering times, marking on crankshaft and marking on cam match 100 per match. Oil tank was taken off, no chips or similar found. In the oil, no traces of bearing damage (copper discoloration) So far I have 4 different views: the one said (master) piston tipper of the second crankshaft Opel said maybel. Tightening roller of the tooth belt the next said hydroslotches I am so slowly despairing, especially now the car, engine half open and nox, camshaft (both right) because the noise is strongest, are no grooves and cams also make a good impression. Who knows about it or who can give help.