2.25 diesel: MOT emissions fail

[thanuk]

My series 3 diesel has just failed for making too much smoke. It produced around 400 units on the MOT test when the pass level is apparently 300 (I'm not sure what the actual unit of measurement is).

I don't know much about diesel engines, can anyone suggest what adjustments are possible, short of overhauling the fuel injection, to get it through the test? Thanks

[tuffer]

Ideal adjustment is to rip it out and fit a BMW 3.0 litre unit. Not sure of whats involved but was reading a mag the other day and it had a feature on it. Will go like stink.

[thanuk]

tuffer said:

Ideal adjustment is to rip it out and fit a BMW 3.0 litre unit.... Will go like stink.

I don't think the brakes, gearbox and driveshafts are up to it though tuffer.

[tuffer]

thanuk said:

tuffer said: Ideal adjustment is to rip it out and fit a BMW 3.0 litre unit.... Will go like stink. I don't think the brakes, gearbox and driveshafts are up to it though tuffer.

Minor details.....

[WLAcopilote]

What colour was the smoke?
Change the oil in the oil bath air cleaner, ensure it is to the correct level. Check and adjust the tappets. Change the fuel filter. Add some diesel injector cleaner to the fuel and take it for a long run with plenty of hill climbing to get it hot and blow any carbon out of the engine and exhaust system.

If that doesn't help, it is time to get a diesel specialist to have a look at it.

[thanuk]

WLAcopilote said:

What colour was the smoke? Change the oil in the oil bath air cleaner, ensure it is to the correct level. Check and adjust the tappets. Change the fuel filter. Add some diesel injector cleaner to the fuel and take it for a long run with plenty of hill climbing to get it hot and blow any carbon out of the engine and exhaust system. If that doesn't help, it is time to get a diesel specialist to have a look at it.

Thanks, I'd already been trying those before it started smoking. Took it to a Landie specialist and he looked at it for 5 seconds before saying the fuel injector pump was weeping and letting air in. Hopefully replacing that will solve the problem although it's possible there are other issues too.