This LRO reader emailed LRO.firstname.lastname@example.org to ask Andrew Varrall about Discovery 1 timing.
I’ve just finished rebuilding my Discovery’s 300Tdi engine, but I’m slightly confused by the timing. I’ve timed the engine as per the method described in the Land Rover workshop manual, but can you tell me how I can be certain that the camshaft and injection pump are in phase? They turn at twice the speed of the crank, so isn’t it possible to have them 360 degrees out of sync? The injection pump was a replacement I bought off the internet and didn’t have its keeper bolt fully screwed in.
Josh Patrick, Didmarton, Gloucestershire
The injection pump and camshaft rotate at the same speed as each other, so it’s not possible to have them out of synchronisation in the way you are worried about. The timing will be correct as long as the timing marks line up and the timing pins can be fitted. But make sure that the pump locking bolt is either in its keeper plate or that the blanking plug is used instead so that the pump can turn.
This workshop advice appeared in the November 2014 issue of LRO. Back issues are available to download on digital devices here.