Quote:
Originally Posted by bornleo369
The car is running. Half yellow check engine light came On. When i start the car, the light goes away for like 5 secs and comes back with message "Engine Malfunction: Reduced power mode".
Spark plugs and coils were changed in Dec 2017 but since then only 10,000 miles have been added in last 2 years.
Codes coming: P0015; P0305; P0304; P0305;
I am freaked out about the misfire code and metal shavings present in motor oil.
I read on different forums and I got to know that VANOS Bolts may be the reason as they get sheared after every two years and the metal debris falls on timing chain.
But again I am not sure.
Please advice.
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I'm assuming you don't want to do the work yourself so I would take the car to a good independent shop that friends recommend, and have them thoroughly inspect the oil for any metal fragments if you have a spun bearing that is allowing metal fragments to reach the vanos it will surely be seen in the rest of the oil.
I still find it hard to believe that it is a spun bearing reaching the vanos is that is pretty unheard of on the n63 engine. If they cannot find any metal fragments in the oil and everything checks out I would still take a sample of your oil and have it sent in for analysis just to be one hundred percent sure and in the meantime I would start eliminating the easy variables such as a faulty camshaft position sensor which is very easy to replace on the n63.
Have the vanos solenoids either properly cleaned or replaced again and also replace the ignition coil and spark plugs on cylinders 4 and 5 for good measure since you have misfire codes on those.also have your entire CCV system thoroughly checked a vacuum leak will cause multiple misfire codes and can be as simple as a broken CCV line which can be hard to spot as they are corrugated and cracks can often hide in the recesses. I have the exact same X5 with 150,000 miles on it so I know the engine pretty well. If you have anymore questions let me know.
X5man does have a point this is an extremely expensive vehicle to work on and unless you personally know a mechanic or can do all the work yourself or have one hell of a warranty I don't recommend you keep this after you get it back on its feet. I do all my own work and the only reason why I keep mine. Parts really arent that bad, it's the labor since it's such a complicated setup that gets ya