What’s Inside a Blown 300,000km Smart Car Diesel Engine？ It's BIGGER Than You Think!

This engine may be small, but the failures are often massive. In today's video, I am tearing down of a Smart Fortwo 0.8L 3-cylinder Diesel engine to find out exactly why it ended up on the scrap bin. These tiny powerplants are famous for their engineering—and notorious for their appetite for oil and burnt valves, turbos, and in this case, hydraulic lifters!

I'll strip this motor down to the bare block, inspecting the engine head, the timing set, and the reciprocating assembly to identify why at 300,000km this engine was condemned. Whether you are a DIY mechanic looking for repair tips or just here to see the internal mechanics of one of the smallest production car engines ever made, this deep dive covers it all.

In this video, I'll cover:
Initial Inspection: External analysis, common issues and the common rail fuel delivery system
The Cylinder Head: Pulling the cam and inspecting the smoking gun: a hydraulic lifter decided to leave the chat!
Bottom End Analysis: Checking piston rings, cylinder wall scoring, and bearing wear in and between the diesel oily mess!
The Verdict: Final analysis of what caused the failure and if these engines are worth rebuilding. While diesel engines in general are reliable, smart engines take a lot of labor as the car has to be disassembled from underneath to swap them out.

Time stamps:

0:00 - The Smallest Engine Teardown
1:03 - Removing the Injectors and EGR
4:36 - Removing the Valve Cover
6:10 - Front Accessories & Timing Chain
12:36 - Head Bolt Removal & Inspection
13:30 - Piston & Crankshaft Analysis
16:51 - Lubrication System
18:04 - The Final Verdict: Why it Failed

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#machine #Equipment #Engine