Product Description
Cummins 3922072 — Genuine Front/Side Expansion (Freeze/Core) Plug for 5.9L
MPN: 3922072 | Also Known As: expansion plug, freeze plug, core plug | Cross-Refs (ID only): 3812090, 3900965, 040093
Genuine Cummins steel cup expansion plug used on the front and side coolant bores of the 5.9L Cummins block. Restores a positive seal to prevent coolant leaks that can lead to overheating and engine damage. Direct-fit for 1989–2002 5.9L (12V & 24V VP44). Sold individually.
Features & Benefits
- OE press-fit geometry for a reliable seal in the factory block bore.
- Corrosion-resistant steel resists rust and pitting in coolant environments.
- Direct replacement for factory front/side block plugs on 5.9L 6BT/ISB (’89–’02).
- Stops seepage and leaks that can cause overheating or low coolant.
- Genuine Cummins quality and material spec for long service life.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1993 | 5.9L 12V (6BT) | Ram 2500/3500 |
| 1994–1998 | 5.9L 12V (6BT) | Ram 2500/3500 |
| 1998.5–2002 | 5.9L 24V ISB (VP44) | Ram 2500/3500 |
Industrial/Off-Highway: Common on B-Series 3.9L/5.9L and C8.3 (e.g., B3.9/4BT3.9/6B5.9/4BTA3.9/C8.3). Verify by ESN for exact locations and quantities.
Compatibility Notes:
- This listing targets the front/side block expansion plug on 1989–2002 5.9L engines.
- Later 5.9L (2003–2007) and 6.7L applications may use different plug counts/sizes in some locations—confirm by VIN/ESN.
Specifications
- Type: Steel cup expansion (freeze/core) plug
- OE Part Number: 3922072
- Cross-References (identification): 3812090, 3900965, 040093
- Quantity Required: Sold individually; multiple plugs per engine (front/side positions)
Often Paired With
- Coolant & conditioner: refill/bleed after plug replacement
- Block heater & rear plug plate: inspect/replace as needed on high-mileage engines
What’s In The Box
- (1) Genuine Cummins Expansion Plug (3922072)
Installation Tips
- Drain coolant and thoroughly clean the bore; remove corrosion and old sealant.
- Install square and flush to the deck using the proper driver; do not distort the cup.
- Use sealant only if specified by service procedure for your ESN; pressure-test cooling system after install.
- Inspect other block plugs; on rusty engines, consider replacing as a set.
FAQ
WILL THIS FIT MY 1989–2002 5.9L CUMMINS RAM?
Yes—3922072 is the OE front/side block expansion plug used on 1989–2002 5.9L (12V & 24V VP44). Confirm locations by VIN/ESN if needed.
IS THIS THE BIG SIDE/BLOCK FREEZE PLUG?
It is one of the factory steel cup plugs used in the front and side coolant bores on the 5.9L block. Verify count/positions before ordering.
WHAT SIZE IS IT?
It matches the OE bore size for the designated locations. If you’re unsure, verify by ESN or measure the bore to ensure correct fit.
IS IT SOLD INDIVIDUALLY?
Yes—quantity 1 per add-to-cart. Order the number of plugs you plan to replace.
DO I NEED SEALANT ON INSTALL?
Follow the Cummins service procedure for your ESN. Many installs are dry on a clean bore; some procedures allow a thin coat of non-hardening sealant.
IS THIS A GENUINE CUMMINS PART?
Yes—OE Cummins expansion plug 3922072.
