Hi was wondering if anybody could help me with a problem with a 23c Massey 35 I bought a few weeks ago. When i bought it i was told it had a full engine rebuild but was still very Smokey. Was told it would be the injectors so had them sent away and serviced , but its still the same. Could it be the timing or the pump ? any ideasThanks,
Jerry Macpherson
Presuming that the engine rebuild was all done correctly, then I think you are correct to look at the fuel system. As you will probably know, servicing of the injection pump is quite expensive so it makes sense to eliminate everything else first. The most obvious place to start is to check the timing. The Engine Rebuild DVD (that is on its way to you) explains the timing procedure, although in our experience it is often necessary to fiddle a little with the pump after following the procedure - each engine seems to be slightly different.
Pay attention to the condition of the timing chain and the timinng chain tensioner, which may not have been checked properly by the person who did the engine repair previously (again this is shown in the DVD). Also the number of shims between the engine and the injection pump intermediary drive gear will affect the backlash between the gears and hence will have an effect the injection pump (as per DVD).
Another thing to check would be the thermostart. On occasions they have been known to dribble fuel into the air intake manifold and cause smoking. It is not an obvious thing to check, but if you think about it it is a source of fuel to the engine which would cause smoking.
Resticted air flow can also cause smoking. Clean the air filter and refill with clean oil (same grade as the engine oil).
If all these are OK then you may have to look at getting the pump serviced.
The Vintage Tractor Engineer