Had a very regular tapping sound from the engine for a while now, I think its valve train related. As its very metallic sounding and quieten downs when hot also it occurs in sync with the revs. Sounds like its a old Ford Diesel!
Ive tried putting some wynns hydraulic tappet solution in and that didnt make any noticeable difference. I ran it for 8 months or so on Diesel oil to see if that could clean off any deposits. Finally yesterday threw some engine flush just before draining the oil.
Have read about the oil pick up O-ring failing on some KV6 models so had one of them and was hoping to drop the sump and replace that. But MG-Rovers crummy exhaust design prevented that. If they had moved the manifolds an inch over it would be simple but it runs in line with 3 of the sump bolts preventing getting them out. Didnt fancy removing the manifolds as heard its a pig of a job, besides dont have any shiny ones to go on at the moment
So decided to put it back together and refill with some new oil. No difference...
Filmed it but the sound quality is crap but here it is.
http://www.youtube.com/watch?v=uRJ76...ature=youtu.be
Threaded Mode