Maybe get a stethoscope or something to pinpoint where the noise is originating from as well as loosening the hardlines. Don't want to jump to conclusions but the PO's description of what happened to him doesn't sound like a precursor to injector knock. Hope that's all it is but be prepared for the worst.

__________________
'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

lots of things. if there is a hole in the piston you should get all kinds of blowby out the oil filler when running. bottom end problems are very rare on these diesels... so bad bearings are about out unless run low on oil. deep knocking is prob mains, higher pitched knocking is rod bearings, knocking under acceleration is mains i think. ticking on decel is wrist pins, i think.

do above tests to see if you can isolate the prob to one cyl and check back.

i am not sure about chain slipping timing on a diesel. on a gas motor your symptoms sound about right for that.

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

My 300SD with 351K miles on it, must have done some injector knocking. I was sitting at a traffic light waiting for the Green, when I started hearing a knocking sound. It sounded like bearings, whether it be mains or rod???

I panicked, my baby can't do this to me yet!!!

Well, I figured I'll be parting her out soon because of this strange unwanted sound emminating from the engine compartment. Seemed like from the bottom area of the engine.

I drove the car anyways. After about 2-3 miles, the sound stopped just as quickly as it started.

Question, is it even remotely possible for bearing knock to go away? I did add a quart of oil because it was a quart low on oil, and ummmmm, I can't remember when the oil was changed last, it's got some blowby and I just keep adding oil as needed, so I figure all the oil isn't that old.

So I figure a piece of french fry might have gotten lodged in one injector and the car needed a hind lick manuever.

Well I took the pan off and my knock was #2 rod bearing.I am in the process of getting the parts car engine started to put in this car. Was also thinking about rebuilding this engine over the winter.But did not know how much I would sink in the motor on a rebuild.So I thought it would be less expensive to replace the engine.I would not think a bearing knock would go away.thanks