Caterpillar O-Ring, PAI 321372 (OEM 6D7146), Pack of 2
Used In These Kits
This part is included in 4 engine & overhaul kits — find yours below.
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321380Caterpillar C10/C12 Oil Cooler Installation O-Ring Kit, PAI (OEM 1433009), Pack of 1 In stock -
321406Caterpillar C12 Oil Pump Mounting O-Ring Kit, PAI (OEM 7X7975), Pack of 1 In stock -
331509Cat / Caterpillar C13 ENGINE O-RING KIT In stock -
331623Cat / Caterpillar C10 ENGINE OIL COOLER O-RING KIT In stock - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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421243International / Navistar O-RING (Pack of 6) In stock -
431310International / Navistar OIL COOLER HOUSING GASKET KIT In stock -
431307International / Navistar OIL COOLER GASKET KIT In stock -
431317International / Navistar FRONT COVER GASKET KIT In stock -
431328International / Navistar REAR MAIN SEAL HOUSING GASKET In stock
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar · International |
| Engine Model | 3176 · C10 · C13 · C12 · DT466E · DT530E · DT570 |
| Condition | New |
| Stage / Tier | Standard |
Pack of 2.
PAI 321372 is an o-ring. PAI lists Viton material. The listed durometer is 75. Listed cross section is 0.103 inch. Listed inside diameter is 3.987 inches. The manufacturer designates product-level OEM 6D7146.
Compatible Engines
PAI lists Caterpillar 3176 Series; Caterpillar C10 Engine; Caterpillar C13 Engine; Caterpillar C12 Engines; Navistar Dt466E Heui Engines; Navistar Dt530E Engine Heui; Navistar Dt570 Engine. The Navistar model rows are listed for 2004 through 2015; these year limits apply to those Navistar entries. Match the complete required part number and listed application before ordering.
Manufacturer product cross-references
Caterpillar 6D-7146
Caterpillar 6D7146
Mack 4333-1841990C1
Navistar 1841990
Navistar 1841990C1
Compare the complete part number, material and required seal specification before ordering.
PAI Part #: 321372
OEM References:
- CATERPILLAR 6D-7146
- CATERPILLAR 6D7146
- MACK 4333-1841990C1
- NAVISTAR 1841990
- NAVISTAR 1841990C1
Applications:
- CATERPILLAR 3176 SERIES
- CATERPILLAR C10 ENGINE
- CATERPILLAR C13 ENGINE
- CATERPILLAR C12 ENGINES
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
- NAVISTAR DT466E HEUI ENGINES
- NAVISTAR DT530E ENGINE HEUI
- NAVISTAR DT570 ENGINE
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 |
|---|
| 6D-7146 |
| 6D7146 |
| 4333-1841990C1 |
| 1841990 |
| 1841990C1 |
| CATERPILLAR 6D-7146 |
| CATERPILLAR 6D7146 |
| MACK 4333-1841990C1 |
| NAVISTAR 1841990 |
| NAVISTAR 1841990C1 |
| PAI 321372 |
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.









