Caterpillar 3400 Cooler Gasket, PAI 331791 (OEM 4N4188), Pack of 5
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Engine family | Caterpillar 3406 (A/B/C) · Caterpillar 3408 · Caterpillar 3412 |
| Brand | PAI Industries |
| Part Category | Gaskets |
| Sub-Type | Gasket |
| Engine Make | Caterpillar |
| Engine Model | 3400 |
| Condition | New |
| Stage / Tier | Standard |
PAI 331791 is a cooler gasket for Caterpillar 3400 Series applications. PAI describes the location as aftercooler to oil cooler. The manufacturer designates product-level OEM 4N4188. PAI cross-references Caterpillar 4N4188. PAI lists these application categories: Caterpillar 3400 Series. Confirm the complete required part number before ordering.
Pack of 5.
PAI Part #: 331791
OEM References:
- CATERPILLAR 4N4188
Applications:
- CATERPILLAR 3400 SERIES
Warranty: 2.0 year(s)
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 |
|---|
| 4N4188 |
| CATERPILLAR 4N4188 |
| PAI 331791 |
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.

