2006 Mini Cooper S, oil leak - MINI Cooper Forum

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post #1 of 7 (permalink) Old Jan 19th, 2014, 08:08 AM Thread Starter
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Canada 2006 Mini Cooper S, oil leak

Hi Guys.

Just got a Cooper S 4 weeks ago and have noticed a biggish oil leak underneath the car.
I'm not really sure where the leak is coming from, so hope that the members here can give me a few pointers about where to start looking.

I took the car to have the tracking checked today, so I took the photos of the oil all over the bottom of the engine while it was up on the ramps. (can't post the pic yet as I have to make 15 posts first )

Thanks in advance...

Last edited by UKGray; Jan 19th, 2014 at 02:44 PM.
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post #2 of 7 (permalink) Old Jan 19th, 2014, 04:04 PM
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Quote:
Originally Posted by UKGray View Post
can't post the pic yet as I have to make 15 posts first
Not true ... you can attach them as described in the following post ...

http://www.mini2.com/forum/3798361-post1.html
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post #3 of 7 (permalink) Old Jan 19th, 2014, 04:35 PM Thread Starter
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Thanks Caveman, just trying to upload the photo's now.

Hoping that some of you guys can help me out here, as the dealer I bought my car from is telling me that they can't find an oil leak .
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post #4 of 7 (permalink) Old Jan 19th, 2014, 04:56 PM
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From Chad Miller, owner of the MINI only shop Detroit Tuned, regarding oil leaks:

Quote:
I see several leaks out of the early cars. The first one that leaks on all cars is the crank sensor. It has an o-ring on it and shrinks after it get hot after 30K and it allows oil pass it only when the car is running. It leaks down the front of the block and collects lots of dirt that comes through the radiator. It will continue down the front of the motor to the pan and blow off when driving. It never drips as it is well above the oil level when the car is parked at any angle. The fix for it is to clean it up, pull it out, RTV it, Put it back in. To do this you HAVE to pull the front of the car off.

The second (and biggest) place I am seeing oil leak issues is the crank seal/gasket. This seal dries up and will also work its way out and allow oil to be pumped out as its right at the oil pump behind the crank damper. Itís the same on cooper or cooper S and itís an easy fix once you pull the crank pulley. When this seal goes it will cover the front cover and the oil pan gasket and will make it look like the pan gasket is going. Sometimes itís good to replace this seal first as it is easy and cheap before you pull the pan and replace that one. The seal is $13.48 the next one is the oil pan gasket. Itís a big job and very messy. (ED: This seems to be what most problems are that weíre hearing about.)

You also have to pull the front end of to pull the air compressor. The gasket is a MINI only part, and lists for $36.71. There are no aftermarket parts for it. I always seal up the crank sensor when doing this job as you already have the front end off, even if the leak is not bad or not at all. I can almost guarantee that, at some point, it will start leaking.

I also see the oil cooler seals on the cooper S go. They get really hot and dry up and get hard. It starts as a drip, and can drip on the driveway. They can also just go and pump all the oil out of the motor. Again a very cheap part at $3.80 each (you need 2) and itís a special square o-ring that youíre not going to just pick up anywhere. Itíll take about an hour to install and requires removing the oil filter to stop the drain of oil in to your work area. You can get to it through the drivers wheel well so itís an easy install.
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post #5 of 7 (permalink) Old Jan 19th, 2014, 05:05 PM Thread Starter
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Thanks for the Quote Caveman...

I'm new to mini coopers, and have not mechanical expertise at all, so if any of you have had oil leaks that look similar to mine, please could you let me know what was causing it, so I can pass that information back to the guys at the dealership...

Thanks again, UKGray
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post #6 of 7 (permalink) Old Jan 19th, 2014, 08:01 PM
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Have you cleaned the oil off? You may have to in order to see where it's coming from.
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post #7 of 7 (permalink) Old Jan 19th, 2014, 10:01 PM Thread Starter
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No, I have made no attempt to clean any oil off, as the place I bought my car from said that they can't see a oil leak!!! I'm hoping that they will see it now, although I very much doubt they will do anything about it .
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