MOT and emissions?

[Neil Jones]

The MOT man reved the Landy high and measured the emissions.  I didn't think the old cars (mine is 1972) had to have a proper emissions test, if anything just a visible smoke test.  The prob was that when you floor the diesel a puff of smoke comes out (other than that she's really clean).  Does anyone know te rules?

[bezzabsa]

sure its a visual on pre 73

[Paul]

Vehicles first used before 1 August 1979

Where possible check that:
there is sufficient oil in the engine
the oil pressure Is not too low
there is no abnormal engine noise
the governor has not been tampered with
the engine is at normal operating temperature

Raise the engine speed to around 2500 rpm, or half the maximum engine speed if this is lower
Hold this speed steady for 30 seconds to ensure that the inlet and exhaust system is fully purged

Allow the engine to return to idle and the emissions to stabilise

1. Assess the smoke emitted from the tailpipe

2. Rapidly increase the engine speed to around 2500rpm or half the maximum engine speed if this is lower and assess the smoke emitted from the tailpipe during acceleration

HTH

[dave_2A_2.25Turbo]

"Note: The criterion is density and not volume of smoke. The description 'dense smoke' includes smoke or vapour which largely obscures vision

Older vehicles, particularly pre-1960, sometimes emit unavoidable smoke due to their design. Such smoke is not a reason for rejection"

[Neil Jones]

Thanks, basically what I thought, btw where did you get that info from?

[dave_2A_2.25Turbo]

http://www.motuk.co.uk/manual/contents.htm

http://www.vosa.gov.uk/vosa/


Both useful links to keep