Cat Regulator Cover Gasket, PAI 331285 (OEM 4N1156), Pack of 5
Used In These Kits
This part is included in 17 engine & overhaul kits — find yours below.
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331166Caterpillar C15 In-Frame Gasket Kit In stock -
331170Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331228Caterpillar 3400 Upper Gasket Kit In stock -
331229Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331230Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331231Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331232Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331235Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331237Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331238Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331239Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331240Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock - 331370GASKET KIT View ›
- 331565FRONT COVER GASKET KIT View ›
- 381847THERMOSTAT KIT View ›
- 381852THERMOSTAT KIT View ›
- 381853THERMOSTAT KIT View ›
- No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Brand | PAI Industries |
| Part Category | Gaskets & Seals |
| Sub-Type | Gasket |
| Engine Make | Caterpillar |
| Engine Model | 3406E · C15 · C16 · C18 |
Pack of 5.
PAI 331285 is a regulator cover gasket. PAI lists Caterpillar 3406E, C15, C16, C18 and 3400 applications and identifies Caterpillar OEM reference 4N1156.
Compare the complete part number and listed application with your required part before ordering.
Fits:
- CATERPILLAR 3406E SERIES
- CATERPILLAR C15 ENGINE
- CATERPILLAR C16 ENGINES
- CATERPILLAR C18 ENGINE
- CATERPILLAR 3400 SERIES
OEM cross-references:
- CATERPILLAR 4N1156
Warranty: 24 months
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| CATERPILLAR 4N1156 |
| PAI 331285 |
No cross-reference numbers match that search.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.

















