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Rough idle and a check engine light could be early tells for this issue, yet still can be a silent engine killer.

The belts can stretch to the point that they jump a tooth and bend cylinder valves, which results in a costly repair bill. On 2008-2014 N63's the timing chains are known to stretch out over time which causes additional wear and tear to the valve-train and negatively impact performance. Follow the thread here.īMW N63 Fuel Injectors N63 Timing Chain Failure The DIY is an expert level, but it has been done. $300 each, but may save you in labor in the long run. Replacing all the fuel injectors at the same time will be costly given they are approx. However, these symptoms are almost identical to those of bad ignition coils and spark plugs (which we covered at the beginning), so we recommend replacing those parts first. If you notice any of these symptoms, its more than likely the injectors.

Black exhaust tips and black residue on the bumper from un-burnt fuel.

So what kind of symptoms can you expect when it is the injector? N63 Fuel Injector Failure Symptoms: Cost for one injector is around $200 then you have to factor in the labor. If you are looking at a model with this engine in it, you should note that these injectors are not cheap. The fuel injectors seemed to go on the fritz pretty early on, with one citing 20k miles on this forum. Even cars with relatively low mileage were not spared. This issues were systemic in this engine. Recommended BMW N63 Engine Oil: LiquiMoly 5w-30 N63 Fuel Injector Failure It is easy enough to add oil to the car, and a quart of oil costs around $10.īe careful: excess oil consumption is also a symptom of leaking valve stem seals which we cover further in this article! Keep a few quarts on deck, you will need them.

The BMW I-Drive will let you know when it's time to add another quart of oil. There is no dip stick in these cars, so there is no fiddling under the hood. In spite of the oil burn off, owners still love the engine and mention that changing the oil every 4-6k miles and stocking a few quarts when the indicator goes off. How much oil does it burn? Well BMW spec says that 1qt per 1000 miles is within the norm, and some owners showing a quart every 600 miles. This area is extremely hot, and causes the engine to burn through more oil, and even drying out gaskets which can lead to leaks. This issue stems mostly from the design of the engine with the turbos being the middle of the "V" or the valley of the engine. The 5 Most Common BMW N63 Engine ProblemsĮven when new, the N63 has been known to be quite thirsty for oil. The symptoms of bad spark plugs are slow cold starts, misfires, and rough idling. Spark Plugs: recommended to be replaced every 30,000 miles, or every 15-20,000 miles for cars running tunes.The symptoms of bad spark plugs are the same ad bad ignition coils, which is why we recommend replacing both parts at the same time. It usually makes sense to replace these at the same time as the spark plugs. Ignition Coils: ignition coils are recommended to be replaced every 45,000 miles approximately.If you have been curious about ownership of a N63, here is our list of 5 common N63 engine problems.

While being ahead of its time and the first of its kind, there were numerous issues with the engine. The result was an engine that cranks out 408 horses and 440ft/lbs of torque, which are great numbers to be paired with their large sedans, coupes and SUVs. This engine has the turbos placed in the valley of the engine ("hot-vee") to keep them close to the exhaust manifold and reduce turbo lag. When BMW introduced this engine in 2008, it was the first of its kind. The V8 engine has always been known for power and performance. Twitter Facebook Pinterest Reddit The "Hot-Vee" BMW N63 V8 Twin-Turbo Engine