Hello, hello, i am replacing a rear main engine oil seal on a TDI motor in a VW Caddy 2003. I have realised that there is a crank angle sensor that is part of the seal. A plastic piece holds the metal ring in a particular spot, so i assume the motor must be on TDC when replacing the seal. How do you have the motor on TDC with the flywheel off?? Is there a tool to lock the motor in the right spot?? Does anyone have any info on lining up the ring on the seal or any fitting info?? I spoke to a couple of VW specialists and they have done plenty of clutches and flywheels but no seals. Thanks for your time.