Rebuilding a Nitro Engine

Episode 15 · Originally released May 1, 2020 · Hosts: Ron and Tom

Ron and Tom explain how to diagnose, disassemble, inspect, rebuild, and reassemble a nitro RC airplane engine.

Chapters

00:39 — When a nitro engine needs rebuilding

08:06 — Engine life and signs of wear

16:01 — What a rebuild restores

24:23 — Removing the drive washer and crankshaft

32:04 — Inspection and careful reassembly

40:08 — Piston rings, liners, and final checks

Episode Topics

When an engine needs attention

Compression, bearings, fuel history, overheating, and visible wear all help determine whether a nitro engine needs cleaning, repair, or a complete rebuild.

Disassembly without damage

Tom walks through removing the backplate, head, drive washer, crankshaft, bearings, piston, and liner while using heat and the correct tools where needed.

Inspection and replacement parts

The hosts discuss bearings, piston-and-liner fit, ringed versus ABC engines, gaskets, and the importance of matching replacement parts correctly.

Reassembly and break-in

Careful orientation, lubrication, clean sealing surfaces, and a sensible break-in help a rebuilt engine return to reliable service.

Key Takeaways

  • Diagnose the engine before ordering parts.
  • Use heat and proper tools instead of forcing tightly fitted components.
  • Keep internal parts clean, organized, and correctly oriented.
  • Replace worn bearings and sealing parts while the engine is apart.
  • Treat a rebuilt engine carefully during its first runs.

Episode 15 Transcript

This transcript has been lightly edited for readability. Timestamps are retained.

Read the full transcript

Join-Path:
Line |
2 | … -Raw -Encoding utf8 -LiteralPath (Join-Path $folder.FullName ‘upload …
| ~~~~~~~~~~~~~~~~
| Cannot bind argument to parameter ‘Path’ because it is null.