Solutions for Excessive Diesel Engine Blow-by

The causes of excessive diesel engine blow-by are as follows:

1. Severe wear of piston rings or cylinder liners: If the piston rings or cylinder liners are severely worn, the seal between the piston and cylinder liner becomes loose. During the compression and expansion processes, a large amount of compressed gas enters the crankcase through the tiny gaps between the rings and the liner, leading to increased crankcase blow-by pressure. Severe blow-by through the breather, insufficient engine power, and possible blue smoke emission may occur. Solution: Replace the piston rings.
2. Piston ring alignment: Even if the piston rings are not worn, if all the ring gaps are aligned, a significant amount of high-pressure gas will enter the crankcase during compression and expansion, causing increased crankcase blow-by pressure. Severe blow-by, increased oil consumption, and possible blue smoke emission may occur. Solution: Visit a professional repair shop or 4S store for inspection and repair.

Adjust the position of the piston rings.

1. Piston ring sticking or breakage: Sticking, broken, or失去弹性的活塞环 will result in poor cylinder sealing, allowing combustion gases to leak into the crankcase and increasing crankcase blow-by pressure. Symptoms include high crankcase blow-by pressure, blue smoke emission, insufficient power, and abnormal noises in the cylinder.

Solution: Replace the piston rings.