Jake : Are you saying it only happens at exactly 2500 RPM's? Not above or below that?
Jake : Thanks, ***** ***** that the noise would go away over 2500 rpms
Jake : generally chain noise would start at a certain rom and continue
Hi Jake Have you any idea what the cause is? chain sprocket mismatch etc we are stumped
Jake : I'm actually a little stumped myself as you say it's ONLY at a certain RPM.
Jake : i was fog to say if it was over a certain RPM I have seen rare cases where a rear cover gasket causes oil pressure to drop
Jake : and it causes you to lose proper chain tension
Jake : but since yours in an exact rpm it's almost like its a manufacturing defect in one of your kit components
Jake : did you notice any guide wear when you pulled the cover back off ?
Hi Jake all the parts are brand new and on stripping the top cover after the noise was noticed after the upgrade, no wear was seen , and nothing out of the ordinary was seen.We may try the old tensioner as we know that worked and use your idea to check for loss of oil pressure, but we cant understand why it appears at these precise revs, as you say it may be a fault with the components , causing a viberation etc, at those particular revs, if you have any more ideas let us know.
Jake : John, since I am not there to hear the exact noise and how loud it is, I'll be honest this is a tricky one because it's so uncommon.
Jake : The only other thing I can honestly say from experience
Jake : is that I have see where worn rod bearings can cause the engine to make a rattle/knock sound at certain RPMS
Jake : BUT if you didn't have the noise prior to the new timing kit then that would also seem unlikely
Jake : Sorry I don't have more for you on this one John, let me know how else I can help
Jake : thanks
Jake thanks for the advice .