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7th January 2019, 16:04 | #1 |
This is my second home
Rover 75 Tourer+ Join Date: Mar 2011
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Opacity Meaning
On my MOT certificate it has figures (Arithmetic average of the Opacity 0.35 m1. what does it mean. Rev. |
7th January 2019, 16:11 | #2 |
Vis Whiz
Rover 75 2.5 auto Saloon Join Date: Jun 2007
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Opacity is the degree to which smoke blocks light, and the basis for measuring the amount of smoke coming from a diesel-powered vehicle. Poorly maintained or malfunctioning engines are sometimes the cause of excessive smoke.
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7th January 2019, 16:15 | #3 |
This is my second home
Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008
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Hi Jules. It is something to do with the smoke emitted. Opacity is the ability to either ‘see through’ it or not. I think it is a measurement of the smoke that comes with the accelerator being pushed to the floor and whether the opacity (thickness’ of the smoke) is within a certain limit. This is really all guesswork, but opacity is the ability to see through whatever you are looking at like water that is dirty,bonfire smoke and the like.
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Great Barr, Birmingham. Last edited by bl52krz; 7th January 2019 at 16:16.. Reason: Beaten by another Dave. Cheers Stocktake. |
8th January 2019, 15:13 | #4 |
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If you look on your info plate inside the door you will see a figure in a box lower left that is the maximum allowed in the smoke test difference between that and MOT figure shows how clean or not. No figure in box then limits are non turbo 2.5 turbo 3.0
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