I was looking on this site last night and could not find good information here about setting VVT while doing the TB. some people said to lock the cams, and that works. here is a link to volvo directions for what looks like P2 series, same VVT we have. no mention of cam lock, but they do take off harmonic balancer. The impt. piece is rotating motor 90 degrees right and then back again to the marks before removing TB.