Atlas Copco Incomplete Combustion / Possible Coolant Ingress

Excessive white smoke from exhaust on startup that continues after warm‑up

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Low compression, Faulty injectors, Coolant leak into cylinders, Incorrect fuel grade

Safety first: Avoid prolonged operation if coolant loss is suspected; engine damage can result.

Check coolant level: Monitor coolant before and after running. Unexplained loss with white smoke suggests internal leak.
Verify fuel: Ensure correct diesel grade and no contamination with water.
Observe warm‑up: Some white smoke at cold start is normal, but it should diminish as the engine warms. If not, schedule injector testing.
Compression/leak‑down test: Have a technician perform tests to identify internal engine issues.

Professional Required 5/5

Fuel Injector Set

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