Mini Cooper S Convertible - recall info - MINI Cooper Forum

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post #1 of 4 (permalink) Old Jan 20th, 2014, 03:34 PM Thread Starter
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DIY Mini Cooper S Convertible - recall info

Hi.

I am looking for some advice about my 09 Cooper S convertible. The engine warning light has been on and off for a few weeks. Mini have had a look today and following a 150 diagnostics charge have advised that there is a build up of sludge due to lots of short journeys, meaning the car doesn't get hot enough to burn this off. I apparently need a new rocker cover amongst other things. The estimated cost is between 800 + 1500, depending on how much damage has been done. Mini have offered to cover the cost of the parts, which has made me suspicious that this may be a common fault or possibly a recall.

The car has done just over 40,000 miles. Does anyone have any advice?

Many thanks
Jen
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post #2 of 4 (permalink) Old Jan 20th, 2014, 03:48 PM
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It's a common problem with the N14 engine.

For more info Google "mini cooper engine coking (or carbon buildup)".
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post #3 of 4 (permalink) Old Jan 21st, 2014, 02:01 PM
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To be honest its a common problem with all cars, I don't know about a specific fault with this engine.
you should always give a car a long run now and again to warm up to then clear it out, especially if its subject to a lot of short journeys.
Also with a lot of short journeys the car ideally needs closer services and the fuel used will play a part in the carbon build up as well, so if you don't use say bp ultimate (which contains cleaning additives) you will need to run a fuel system cleaner through it periodically so the engine burns cleaner again.
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post #4 of 4 (permalink) Old Jan 21st, 2014, 03:14 PM
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The N14 engine is direct injection, so fuel doesn't clean the intake valves ... and that's where the carbon builds up.

Also, the PCV set up isn't the best design ... which is why some owners are fitting oil catch cans.
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