What Causes Excessive Smoke in Diesel Engines?

1 Answers
SanAdaline
07/29/25 10:10pm
Here are the reasons and solutions for excessive smoke in diesel engines: 1. Vehicle malfunction: There are many causes of malfunction, such as severe wear of piston rings and cylinder liners, stuck piston rings, or abnormal combustion in a certain cylinder leading to improper operation of piston rings. Solution: It must be disassembled for specific diagnosis and then repaired. 2. Abnormal fuel injection: Replacing the high-pressure fuel pump can increase the injection pressure and fuel volume, but if the fuel injector is not replaced, the fuel spray may be poor. Combined with the increased fuel injection volume, incomplete combustion occurs, resulting in white smoke from the exhaust pipe. Solution: Try replacing with a new fuel injector. 3. Excessive component clearance: Burning engine oil can cause the clearance between piston rings, pistons, and cylinder liners to increase, leading to blue smoke from the exhaust pipe. Solution: The vehicle needs to be sent to a repair shop for an overhaul.
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