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smoking and knocking diesel engine?

i have a 98 vauxhall monterey with a 3.1 isuzu diesel engine.there is white smoke and lod tapping noise when revved.i have overhauled injectors and changed fuel filter and oil and filter.any ideas
phil, June 2009
engine knocking over 3000 revs

mr smith, September 2009
Hi phil,
Try advancing the fuel injection timing a little,and check the result.

Rabinder, August 2009
could be shell bearings but more a knock than a tap

mikec, June 2009
link Click here to see other fixes for Isuzu 3.1.