Mini Cooper S owners have reported 2 problems related to crankcase (pcv) (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mini Cooper S based on all problems reported for the Cooper S.
While driving my Mini the check engine light came on. I took it to a local repair shop that specializes in Mini's. The manager told me that the crankcase valve needs to be replaced and it is built into the valve cover. Upon inspection the mechanic also discovered my timing chain is almost ruined also. I have been hearing the timing chain rattle upon start up.
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The car started leaking small amounts of oil in the garage, approximately the size of a dime. When the car was parked you could smell a slight oil burning odor. The car sat for 3 days, was driven and smoke began coming out from under the hood. There was no fire. The result is that the "turbo oil feed line" and "crankcase to valve cover hose" were replaced because both were leaking oil. At 50700 mi, we had to replace the valve cover and ccv assembly. This car was repaired under the recall pe11036 for a cooling fan issue. Considering the low mileage on this vehicle, it seems to me that there have been too many issues with it related to the turbo charger and oil system. From reading other issues online it appears that there are design flaws with the shielding of these components from high heat sources on the engine. These repairs are very expensive and are not related to poor or abusive driving habits.