mercedes 603 diesel engine

i have just bought a 300d gd g wagon fitted with a 603 non turbo diesel engine.i have just fitted new cam followers and new injectors but the engine now smokes heavily grey'white smoke with a strong diesel knock.it
was ok when the job was first done and only started to smoke after about 10 miles can anyone help thanks.i am a qualified mechanic but at a dead end with this.HELP.
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Two variables: Valves and injectors.
Smoke is unburnt fuel so you need to determine why its not combusting completely.
Given ten miles use before the problem began I'd suspect the valve adjustment. A TURBO engine at 70 degrees F. has its intakes set to .004 INCH and its exhaust to .014 INCH. Though your engine is not a turbo it will have similar specs.
If you're confident the valve adjustment is OK, I'd move on to the injectors - one of them is dribbling - stuck open and the smoke is from fuel burning in the exhaust manifold. That would also explain the knocking.
Hope this helps.
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The "bad" injector can be found by cracking open one high pressure line at a time (at the IP) while the engine idles - create an intentional leak so a cylinder doesn't fire. I've had mixed success with this method but it sure beats removing all the injectors!
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The 60x engines have hydraulic elements. You do NOT adjust them.

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