Product Description
Genuine Cummins
Cummins 4937308 — Piston Cooling Nozzle / Oil Squirter (6 Required)
MPN: 4937308 | Also Known As: piston oil squirter, piston cooling jet | Qty Required: 6 per engine | Related Hardware: Banjo bolt 3964817 (sold separately)
Why This Part
- ✓ OE spray pattern cools piston undersides under load.
- ✓ Direct-fit for Ram 5.9L/6.7L ISB (2003–2018).
- ✓ Helps prevent piston scuffing and thermal failure.
- ✓ Genuine Cummins quality and durability.
OE Fit 6 Per Engine Stock Replacement
Quick Specs
| Type | Piston cooling nozzle / oil jet |
|---|---|
| OE Part # | 4937308 |
| Cross-References | 4890024, 3968877 (for identification) |
| Qty Required | 6 per engine (sold individually) |
| Hardware | Uses banjo bolt 3964817 |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Common on ISB/QSB 6.7 (EPA13+); always confirm by ESN.
Often Paired With
- Banjo Bolt: 3964817 (one per nozzle)
- Oil Cooler (5.9L): 3959031
- Oil Cooler (6.7L): 3975818
What’s In The Box
- (1) Genuine Cummins Piston Cooling Nozzle (4937308)
- Banjo bolt sold separately (see “Often Paired With”).
Install Tips
- Cleanliness is critical—flush oil galleries if debris was present.
- Orient spray toward piston underside per Cummins procedure.
- Use correct torque on banjo bolt 3964817; verify in service manual.
- Prime oil system and check for leaks on warm-up.
FAQ
WILL THIS FIT MY 2003–2018 5.9L/6.7L CUMMINS RAM?Yes—this nozzle is listed for 2003–2007 5.9L ISB and 2007.5–2018 6.7L ISB applications (verify by VIN/ESN).
HOW MANY NOZZLES DO I NEED?Six per engine—sold individually. Order quantity 6 for a complete set.
DOES THIS INCLUDE THE BANJO BOLT?No—the banjo bolt (3964817) is sold separately and is one per nozzle.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 4937308 with the correct spray pattern and fitment.
WHAT ARE THE CROSS-REFERENCE NUMBERS?Common identifiers include 4890024 and 3968877 (used on related ISB/QSB applications).
Product Videos
Custom Field
Vehicle Year 2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2018
Vehicle Make DODGE
ENGINE 5.9L,6.7L
