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Re:What Broke
If the car is a later model w/ hydraulic lifters, there is a possibility
of the lifters sticking open due to excessive oil pressure. Although I
have not seen it occur on the Audis, it does happen semi-often on the VW
motors w/ same lifters. The pressure relief valve will stick closed &
the pressure goes very high. If there are no other apparent reasons, you
might want to check it out w/ a pressure gauge. The first time we
encountered this one it was a real bitch to figure out. Good luck
Ron Wood
Audis a plenty-82 TQC, 84 & 85 4KQ, 8? S-1 rally Quatro