What is the solution for the blue smoke issue in a cold BMW?
1 Answers
BMW cold start blue smoke issue solutions are as follows: 1. Valve guide: The seal between the valve guide and the guide hole is not tight, causing oil to leak into the combustion chamber. The solution is that replacing the valve stem seals does not work; only replacing the valve guide can solve the problem. 2. Untimely maintenance: Not performing maintenance as required. For example, exceeding the mileage without timely engine maintenance, using unqualified engine oil, or not replacing the engine oil and oil filter on time, leading to overly thin oil and incomplete combustion. The solution is to strictly follow the maintenance manual for servicing. 3. Incorrect driving: Long-term incorrect driving habits, operating with insufficient oil for extended periods, or long-term overloading, causing premature engine aging and wear. 4. Filter aging: Poor quality of the mixed gas involved in combustion, or the filter is aged and damaged without replacement. The solution is to replace the aged and damaged filter.