Product Description
CUMMINS 3802132 OEM ENGINE PISTON KIT – .020 OVER (MARINE-STYLE BOWL) – 5.9L 12-VALVE 6BT (1989–1998)
The genuine CUMMINS 3802132 .020 over piston kit is an OE-forged replacement engineered for 1989–1998 5.9L 12-valve 6BT engines. Featuring the desirable marine-style combustion bowl, this piston improves airflow, supports cleaner burn characteristics, and offers a stronger thermal profile for towing, daily driving, or performance applications. If you're rebuilding a 6BT and need oversized pistons to correct cylinder wear, this is the factory solution designed to last well beyond aftermarket alternatives.
This kit includes the piston, rings, wrist pin, and retainers—everything required for a precise OE-spec overhaul. The marine-style bowl design helps optimize swirl and air/fuel mixture quality, while the forged alloy construction resists cracking, scuffing, and elevated EGT stress. Whether you’re building a stock engine or a work-ready performance 12V, this OE Cummins piston kit ensures correct compression, durability, and long-term reliability.
Fitment Details
- Engine: Cummins 5.9L 12-Valve 6BT
- Years: 1989–1998 (VE & P7100 pump applications)
- Oversize: .020” (0.50mm) overbore – requires properly machined cylinder walls
- Common Applications: Dodge Ram 2500/3500, industrial 6BT, agricultural B-series platforms
- Combustion Bowl: Marine-style bowl for improved airflow and mixture quality
Always verify piston size and bowl configuration by engine serial number (ESN) before ordering.
Cross-Reference & Compatible Cummins Components
Pair this piston kit with other genuine Cummins rebuild components for a complete top-end or full-engine overhaul:
- CUMMINS 3802375 OEM PISTON RING SET – 5.9L 12-VALVE
- CUMMINS 3804896 OEM CONNECTING ROD BEARING SET – 5.9L 12V
- CUMMINS 3802070 OEM MAIN BEARING SET – 5.9L CUMMINS
- VIEW ALL GENUINE CUMMINS PARTS
Common cross-reference identifiers: 3802132, 3802132RX, 3802133 (alternate oversizes), 3802375 (ring set), 3804896 (rod bearings).
Installation Notes
- Cylinders must be bored and honed to match .020" oversize specifications.
- Verify deck height, piston protrusion, and valve clearance, especially with marine-bowl pistons.
- Always use clean, lint-free installation practices for piston, pin, and rings.
- Ensure correct piston orientation—marine bowl should face injector spray pattern as intended by Cummins design.
Specifications for cummins 3802132
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3802132 |
| Oversize | .020" Over (0.50mm) |
| Bowl Type | Marine-style combustion bowl |
| Engine Compatibility | 5.9L 12-Valve 6BT (1989–1998) |
| Typical Vehicle Fitment | 1989–1998 Dodge Ram 2500/3500 w/ 5.9L Cummins |
| Included Components | Piston, rings, wrist pin, pin retainers |
| UPC | 3665011676300 |
| GTIN | 3665011676300 |
| Shipping Weight | Approx. 3.5 lbs per piston kit |
| Shipping Method | Standard or expedited ground from CPP Diesel |
| E-Codes | Applies to multiple 6BT emissions families; verify per ESN |
| Cross-Reference Notes | 3802132, 3802132RX, 3802133, 3802375 (rings), 3804896 (rod bearings) |
| Prop 65 Warning | WARNING: Cancer & reproductive harm — www.P65Warnings.ca.gov |
Frequently Asked Questions
IS THIS A TRUE CUMMINS OEM PISTON KIT?
Yes, this is a genuine Cummins 3802132 piston kit, not an aftermarket substitute. All components meet factory metallurgy and dimensional standards.
WHAT MAKES THE MARINE-STYLE BOWL DIFFERENT?
The marine bowl design improves air/fuel mixture quality and swirl, resulting in better burn characteristics and enhanced durability under load.
DO I NEED MACHINE WORK FOR .020 OVERSIZE PISTONS?
Yes. A professional machine shop must bore and hone the cylinders to .020" over before installation.
CAN I MIX MARINE-BOWL PISTONS WITH STOCK BOWLS?
No. All cylinders must use the same piston bowl design to maintain balanced combustion and correct compression characteristics.
DO THE RINGS COME PRE-GAPPED?
No. Rings must be file-fit to the cylinder and checked carefully for correct end gap during installation.
