I have a 2005 CRD that I just replaced the lifter, Rockers, and a Cam in: (
viewtopic.php?f=5&t=86401).
I have driven it about 150 miles since the work was finished. Everything was great. Now I have this sound. It goes away above 950 RPM. It is hard to discern where it is coming from but I am worried it is valvetrain noise. I dumped a bottle of Lucas in the oil to see if that changed the sound. I noticed no difference. The sound has gotten louder over the past 4 days since it has become noticeable. I first that it was paranoia induced imaginative sounds. I did put new fuel in around the day before the sound started but I don’t think it is related. I may add cetane boost to see if it changes anything similar to why I added Lucas, for diagnosis. I have no loss of power.
I am worried the head was damaged when I had rocker/lifter failure. I replaced the intake cam due to some marring of the surface.
I am trying not to snap at this point. $2,000 for a new head, head gasket, and rockers/lifters would be like trying so swallow a rhinoceros turned sideways at this point.
Any tips on finding the noise and diagnosing this? I am half tempted to drive it as is but I am worried I will be rolling the dice with buying another camshaft if it is the head. A broken rocker/lifter might screw one up again. I will pull the accessory belt off to see if that changes the sound when I get home form work, if I get home from work.