What are the steps for BMW valve lift matching?
2 Answers
After performing vehicle diagnosis on the BMW using a professional scanner, delete the fault codes. Select Vehicle Processing - Service Functions - 01 Motor - Engine Electronic System - Matching Procedure - Identify Electronic Valve Control Limits, then wait for the matching to complete. After completing the matching, conduct a long-distance test drive (over 50km) with the BMW to prevent eccentric shaft sticking. After the test drive, check the DME (Engine Electronic System) for any stored fault codes. If no faults are stored, the matching process is fully completed.
As a technician with over a decade of auto repair experience, I frequently handle valve lift matching when servicing BMWs. This procedure involves connecting a professional diagnostic scanner to the OBD port, starting the engine to stabilize idle, then selecting the matching function in the BMW-specific program. During operation, warm up the engine to normal operating temperature, maintain RPM around 2000, and avoid throttle interference. The entire process takes 15-20 minutes. After completion, clear any fault codes and verify the system is normal. Skipping this step may result in sluggish acceleration or increased fuel consumption due to misaligned variable valve timing. I recommend performing this matching regularly, especially after VANOS component replacement. For maintenance, always use genuine diagnostic equipment – avoid counterfeit tools. Remember, safety first: wear protective gloves to prevent burns. This method enhances BMW performance and longevity, saving owners from future troubles.
