 | Home > Off Topic > 2009 Mini - failed MOT |
 
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6346   
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One for those that know their oils.
took my daughter Mini for an MOT and the short story is it failed on Emmissions (didn't fail first time round on emmissions). Lamda - fail. I'm lead to believe this could have been a result of the exhaust leaking at joint after I removed / refitted. Anyhow after having another go at jointing the exhaust along with exhuast paste. I've also put aload of Catoclean in the fuel and replaced the spark plugs. While at it I noticed the was little / no oil in the engine so chucked a few litres of some basic oil in until I do a proper oil change with filter etc. anyhow now the the hydro carbons have gone from 10 to 210 - 200 being the limit. so now a fail on the hydrocarbons. 
any thoughts - I'm wondering if the Catoclean was doing its stuff and cleaning all the hyrdrocarbons out the exhaust at the time of testing? are there any oils out there I should be using that would minimise the hydrocarbon result as the tester suggested the piston rings have gone and hence the problem?  |
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17th Jun 2025 8:16pm |
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| BrickBox Member Since: 05 Oct 2021 Location: Wales Posts: 984  
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Have you taken the car for a good run to get it right up to temp? 2008 2.4 110 Utility Station Wagon XS.
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17th Jun 2025 8:57pm |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6346
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I did do a 20 min fairly quick drive before hand but then it was sat for 20mins before it went for the test
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17th Jun 2025 9:24pm |
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