Product Description
CUMMINS 3969988 OEM INTAKE HEATER GRID GASKET – 5.9L CUMMINS (1989–2007)
The genuine CUMMINS 3969988 OEM intake heater grid gasket provides the critical seal between the heater grid and the intake plate on 5.9L Cummins engines. Over time, heat cycling, fastener torque, and soot buildup can cause the original gasket to flatten or leak — reducing cold-start efficiency and allowing unmetered air to enter the intake. Installing a fresh OEM Cummins gasket ensures proper sealing and restores factory performance.
This gasket fits all 1989–2007 5.9L Cummins engines, including both 12-valve (VE & P-pump) and 24-valve (ISB) platforms. Whether you’re deleting, servicing, or reinstalling a heater grid assembly, this is the correct Cummins part to use — not an aftermarket substitute.
Pair this gasket with related OE components such as the CUMMINS 3944128 intake plate gasket or intake heater hardware for a complete, leak-free reassembly.
Key Features
- Genuine Cummins OEM gasket – exact fit and material specification.
- Restores proper sealing between heater grid & intake plate.
- Heat-resistant design for long-term durability.
- Correct fitment for 1989–2007 5.9L Cummins (all variants).
- Ideal for grid heater servicing, reinstallation, or leak repair.
Fitment Details
- Engine: 5.9L Cummins (12V & 24V)
- Years: 1989–2007
- Applications: Ram 2500 & 3500 trucks, industrial / B-series uses where applicable
- Component Location: Seals heater grid to intake plate
Always verify by VIN/ESN to ensure correct Cummins parts selection.
Cross-Reference & Companion Cummins Parts
- CUMMINS 3944128 INTAKE PLATE-TO-HEAD GASKET
- CUMMINS 5289338 INTAKE MANIFOLD GASKET (2003–2007)
- VIEW ALL GENUINE CUMMINS PARTS
Common Cummins cross-reference numbers: 3969988 only (direct part; no supersessions commonly listed).
Installation Notes
- Clean all mating surfaces thoroughly before installation.
- Torque heater grid and intake plate bolts to Cummins specification.
- Check for boost leaks after installation.
Specifications for cummins 3969988
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3969988 |
| Function | Intake heater grid-to-plate sealing gasket |
| Engine Compatibility | 5.9L Cummins 12V & 24V (1989–2007) |
| UPC / Barcode | 019495193532 |
| GTIN | 019495193532 |
| Shipping Weight | Approx. 0.05 lb |
| Shipping Method | Standard ground or USPS First Class |
| Cross Reference | Direct part number: 3969988 |
| E-Codes / Emissions | Used on non-certified & ISB applications; refer to engine documentation |
| Prop 65 Warning | WARNING: May expose you to chemicals known to cause cancer and reproductive harm. See www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by production batch) |
Frequently Asked Questions
WILL THIS GASKET FIT BOTH 12-VALVE AND 24-VALVE 5.9L CUMMINS ENGINES?
Yes. CUMMINS 3969988 is used across all 1989–2007 5.9L Cummins applications with a factory heater grid.
SHOULD I REPLACE THIS GASKET ANY TIME THE HEATER GRID IS REMOVED?
Yes. Any time the heater grid or intake plate is removed, Cummins recommends replacing the gasket to ensure proper sealing.
WHAT OTHER GASKETS SHOULD I REPLACE AT THE SAME TIME?
It is common to replace the CUMMINS 3944128 intake plate gasket or CUMMINS 5289338 intake manifold gasket depending on your model year.
IS THIS A GENUINE CUMMINS GASKET?
Yes — CPP Diesel supplies the authentic Cummins 3969988 gasket, not an aftermarket copy.
CAN A LEAKING HEATER GRID GASKET CAUSE BOOST LEAKS?
Yes. A failed heater grid gasket can cause air leaks and reduced engine performance, especially under boost.
