diesel knock on 300 tdi

THEengineer · May 20, 2015

since getting my 300 tdi back with its replacement lump,i have noticed the diesel knock is a lot more pronounced,unless its my imagination as the gaylander i borrowed is a lot quieter,timings spot on but pumps still turned up i think,put the diaphragm back to where it should be but tick over is still high,could this cause it? also still a bit of black smoke on load

mick the builder · May 20, 2015

Id tweek the pump a bit. I had it on a 200tdi. Had diesel knock and lacked acceleration.

phippsey27 · May 21, 2015

You can either turn pump down by screw at back of pump 1/4 turn or retard your timing by taking cover of of timing housing slacken x3 10mm bolts and turn pump sprocket back a little with a 22mm socket (I think) mark it all first as there is only a small amount of adjustment. Only takes 5 mins but 1mm movement makes a diffrence

THEengineer · May 21, 2015

phippsey27 said:
You can either turn pump down by screw at back of pump 1/4 turn or retard your timing by taking cover of of timing housing slacken x3 10mm bolts and turn pump sprocket back a little with a 22mm socket (I think) mark it all first as there is only a small amount of adjustment. Only takes 5 mins but 1mm movement makes a diffrence

where is the screw at the back of the pump?

lynall · May 22, 2015

If tickover is high and its black smoking thats a pretty good sign someone has wound in the max fuel screw way to much.
6mm head and a 13mm locknut, spanner sizes

phippsey27 · May 22, 2015

THEengineer said:
where is the screw at the back of the pump?

Hope this helps. Perry

THEengineer · May 22, 2015

thanks chaps,will have a crack at sorting this tomorrow

THEengineer · May 23, 2015

did what you guys suggested,problem totally cured

mick the builder · May 23, 2015

THEengineer said:
did what you guys suggested,problem totally cured

Happy days

diesel knock on 300 tdi

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