14 R-4 DIU3 (Discontinued Item)
Applications: MWM, MAN, LIEBHERR, WAUKESHA, CATERPILLAR
Item no.: 14 R-4 DIU3
FEDERAL MOGUL Industrial Spark Plug
14 R-4 DIU3
According to an announcement by the manufacturer TENNECO/Federal-Mogul, production of this spark plug type is expected to be discontinued starting in mid-August 2026. As an alternative to this popular and proven spark plug, we recommend the high-quality FN86WWCC spark plug (formerly 14 GZ-LL) from the same manufacturer.
Category: All Spark Plugs, Spark Plugs
Brand: FEDERAL-MOGUL
Engine manufacturer: CATERPILLAR, LIEBHERR, MAN, MWM, WAUKESHA
Technical data
| Manufacturer | FEDERAL MOGUL |
|---|---|
| Model | 14 R-4 DIU3 |
| Electrode spacing | 0.30 mm |
| Electrode material | Iridium/Iridium |
| Thread | M14 × 1.25 |
| Thread length | 19 mm (3/4") |
| Wrench size | 20.8 mm |
| Application | MWM, MAN, LIEBHERR, WAUKESHA, CATERPILLAR |
