SPECIALIZED SERVICES | BMW

WHY ARE THEY SO IMPORTANT?

Specialty repairs are not offered at your average repair shop because most repairs of this nature require factory training, specific tools, extensive experience and a unique knowledge to execute them properly. Excelerate Performance has brought all of these requirements together into one shop so that your specialty repair doesn't become especially disastrous.

S54 VALVE ADJUSTMENT

The S54 has been known to be very reliable sub breed of BMW’s lower output M54 engine but requires maintenance to last like any other engine however, more frequent maintenance is required for the engine’s longevity. The M3 e46, Z3M, Z4M with the S54 engines all use mechanical valve lifters which have a higher RPM capability despite their ongoing adjustment requirements. So, why is a valve adjustment so important? Without proper valve clearance the valves will not seat fully. A partially open valve will result in compression loss and improper valve cooling. The final result is burnt valves. When this happens you must remove the head and send it to a machine shop for a valve job. This is a far more complicated repair process than can be avoided by a little maintenance. This now extended repair will now lead you to having to replace unnecessary parts that are not typically known to not be a problem. When letting these maintenance items go too long without being addressed you usually find yourself fixing things that never needed to be replaced in the first place.

What is a valve clearance and why is it important to adjust valve lash or clearance? Valve clearance is the space between the rocker arm and the camshaft. Why important? If you have too much or too little clearance it can quickly cause extreme damage to your engine. But before the catastrophe comes reduced performance, a noisy valve train, poor gas mileage, excessive emissions, etc. But in order to adjust valves properly you need some special tools, measurements and knowledge. Excelerate Performance’s service team has it all. Contact us to find if you need to have your valves adjusted!

CARBON CLEANING

Is direct injection plugging up your intake system and valves with carbon? You might ask, what is direct injection (aka (GDI) Gasoline Direct Injection or (FSI) Fuel Stratified Injection) and does my car have it? Direct injection sprays fuel directly into the combustion chamber instead of into the intake track. This is a faster and more efficient way to get fuel into the cylinders which leads to better fuel economy and cleaner emissions. With any advance in technology comes great benefits, but also some consequences. In this case, carbon buildup is the leftover downside of a great advancement. By spraying fuel directly into the cylinders you lose the ability to burn off carbon on the back of the intake valves like older model vehicles. Carbon from EGR and PCV systems find their way back into the engine to be re-burned; but without the fuel spray to de-carbonize you are left with a mess that needs to be cleaned. Common symptoms range from rough idle, lost power, slow acceleration, misfires and even poor fuel economy. Don't worry. We have the tools and expertise to get you back on track for performance and fuel economy. Whether it be with our FuelKare Decarbonizing machine or the good ole hand scraping and cleaning of the valves, we'll get you taken care of.

OIL FILTER HOUSING

Many e9x cars have three common problems at around 100k miles. 1) Failed oil filter housing gasket 2) Failed water pump and lastly 3) Failed thermostat. In this section the oil filter housing gasket is the main focus. The oil filter housing is grooved for an o-ring style seal. Great design, but unfortunately these rubber o-ring gaskets have a shelf life in an extreme heat environment like this. This area of the engine can see temperatures over 250* ambient temp. The expansion and contraction of the rubber as it heat cycles, shrinks over time. When a rubber seal shrinks it will leak eventually, which is exactly what happens in this situation.

N54 WATERPUMP

The N54 use a block mounted external centrifugal electric water pump that looks sort of like a turbocharger. The power of the electric wet-rotor motor is electronically controlled by the electronic module in the pump. The electronic module is connected via the bit-serial data interface (BSD) to the ECM engine control unit. The engine control unit uses the engine load, the operating mode and the data from the temperature sensors to calculate the required cooling output. Based on this data, the engine control unit issues the corresponding command to the electric coolant pump. The electric coolant pump regulates its speed in accordance with this command. The system coolant flows through the motor of the coolant pump, thus cooling both the motor as well as the electronic module. The coolant lubricates the bearings of the electric coolant pump.

QUESTIONS? CONCERNS? SUGGESTIONS?

This page will be updated in the future to update information and add services specific to BMW. If you would like to see something added or have ideas, we would like to hear from you.

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