Used Excavator Engine Inspection Checklist: Smoke, Blow-by and Oil

The engine is one of the most expensive parts to repair on any used excavator. A few simple checks, done in person or by video, can save you from a costly surprise after the machine arrives.

1. Cold start

Always ask for a cold-start video with the engine cover open. Hard starting, long cranking or heavy white smoke can point to worn injectors, low compression or glow-plug problems.

2. Smoke colour under load

A little black smoke under heavy digging is normal. Constant black smoke suggests fuel or air-intake issues; blue smoke means oil burning; white smoke that smells sweet may mean coolant entering the cylinders.

3. Blow-by

Remove the oil filler cap with the engine running at high idle. Strong pulsing fumes or oil mist indicate worn rings or liners. Gentle vapour is acceptable on an older engine.

4. Fluids

Check engine oil for a milky colour (coolant contamination) or a fuel smell. Look at the coolant for oil film. Ask for an oil sample analysis if the machine is high value.

5. Leaks and turbo

Look around the turbocharger, oil cooler and rear main seal for wet spots. Listen for whistling or grinding from the turbo when revving.

Our team can record a full engine check video for any machine in our Shanghai yard before you pay.

Looking for a used excavator or wheel loader?
YC Used Machinery / Shanghai Yongcheng Used Machinery
No.68 Qinggao Road, Fengxian District, Shanghai, China
WhatsApp: +86 166 8175 4290 · Email: vangher43@gmail.com
Website: https://selldigger.com
Follow us: Instagram · TikTok · Facebook: YC Used Machinery

← News