Posted by NolanJae on April 20, 2011 at 19:04:09 from (97.127.92.39):
I completed an in frame overhaul on my 560 d282. Got her to the point where I could start it. I fired it up and it cleaned up in a few seconds and sounded great. smooth idle, crisp sound to the motor and so on. Was happy with a job well done that was until I bumped it up to about 1/3 throttle. It still runs good-clean exhaust but I can hear what I think is a knock. put her back to idle and it goes away. stopped it re adjusted the valves and tried her again. Sounds good till you bump it up to 1/3 throttle- it still sounds good but I can hear something. I bumped it up a little more a couple times and it sounds more isolated or more distinct with more throttle. It almost sounds like one piston is slapping or one rod is knocking. Its not distcit enough where I'm sure that is what it is. Can the one exhaust port which comes out right at the exhaust stack make it sound like a knock bouncing off the steel ceiling? (I'm grasping for straws here) I did not pull out the crank or cam during the work but everything speced out close enough for a wagon puller and light loader work so I replaced the rod and main bearings,wrist pins, pistons, sleeves, rings. I did not test or replace the injectors but pulled them out and replaced the seal between the injector and precombustion chamber along with dust seals. The only thing I did not do is the head. I took it to a local race shop where he fuxed it put in 12 valves and resurfaced it. I did not doudble check his work. But now I'm questioning everything. Not blaming him tho... I'm sure its something I did or did not do. just could not afford to have someone do the work for me. any ideas on where to look? I dont know where to start. Tried using a piece of wood as a stetha scope but cant even find were it is coming from. I had to go through the motor because the motor pulled a sleeve down. Any ideas would be great. Pull the oil pan? pull apart all the caps and reasemble? pull the head? Start all over again? sell for scrap? Any ideas would help.
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