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Specifications

The AFA Industries 2274239 Injector Sleeve is an aftermarket equivalent to Caterpillar part 227‑4239, commonly cross-referenced also as 166‑3739 and 263‑4920. It is engineered to fit Cat engines such as 3406E, C15, C16, C18, and 3456, providing precise bore alignment for injector cups and O‑rings. The sleeve prevents injector cup damage and wear from thermal and mechanical stresses, ensuring optimal fuel injection system integrity. Weighing ~0.23 lb and packed in compact packaging (~3 × 3 × 3 in), it's ideal for professional rebuilds and maintenance shops. Available in bulk kits (6 per engine) for fleets or multi-valve rebuilds.
Weight
0.23

Compatibility

Freightliner, Kenworth, Peterbilt Class 8 trucks with Cat 3406E/C15/C16/C18 engines.
Caterpillar 3406E, C15, C16, C18, and 3456 series engines (mid‑1990s through 2000s)
 

Alternative Part Numbers

  • 166‑3739
  • 263‑4920
  • Caterpillar 227‑4239
  • Interstate‑McBee M‑2274239

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