I have a 2004 RR L322 with the 4.4 M62 engine. I have been fighting ticking in the engine for long time now and have run out of ideas.
The ticking sounds similar to stuck hydraulic lifter and only noticeable at idle or up to about 1500rpm. The ticking comes from the top end at aft left side.
I have already removed the sump and front of engine to inspect timing chain guides but all normal. I then replaces timing chain tensioner and both vanos units and vanos solenoids. I have tried different oil types and grades but the tick remains..
I think now I need to have some M62 specialist to look at this for me...
can anybody recommend a good shop who specializes in RR and are experienced with this engine ? I am located south of London.
I guess the best people might be some BMW engine specialists as the M62 is a BMW engine.
any advises will be apreciated