Reasons for Blue Smoke Emission During Cold Engine Start

[VonJuliana]

Cold engine start with blue smoke emission is caused by insufficient sealing between the valve guide and guide bore, as well as failure to perform maintenance as required. Below are detailed explanations for the reasons of blue smoke emission during cold engine start: 1. Insufficient sealing between the valve guide and guide bore: This may lead to oil leakage into the combustion chamber, resulting in blue smoke emission. 2. Failure to perform maintenance as required: This can cause the engine oil to become too thin and not burn completely, leading to blue smoke emission during combustion. Specific behaviors include not performing engine maintenance on time after exceeding the mileage limit, using unqualified engine oil, and failing to replace engine oil and oil filter on time.