Product Description
Cummins 3903924 OEM Timing Pin – 5.9L 12-Valve (1989–1998)
The Cummins 3903924 OEM Timing Pin is the genuine factory replacement timing pin used to accurately locate Top Dead Center (TDC) and perform injection timing procedures on 1989–1998 5.9L Cummins 12-valve engines. Designed for use with both VE rotary pump and P7100 injection pump applications, this OEM timing pin helps ensure precise timing adjustments and proper engine setup during maintenance, rebuilds, pump swaps, and performance tuning.
Manufactured to Cummins OEM specifications, the 3903924 timing pin provides a precise fit and reliable operation when locating the cam gear timing bore. Whether you're performing a stock timing adjustment or building a high-performance 12-valve Cummins engine, using a genuine Cummins timing pin helps maintain accuracy and prevent timing-related issues.
Features
- Genuine Cummins OEM timing pin
- Factory replacement for Cummins part number 3903924
- Used to accurately locate Top Dead Center (TDC)
- Compatible with VE and P7100 injection pump engines
- Helps ensure accurate injection timing procedures
- Direct-fit replacement for damaged or missing timing pins
- Built to Cummins OEM specifications
- Ideal for maintenance, rebuilds, pump swaps, and timing adjustments
- Designed specifically for 5.9L 12-valve Cummins engines
Fitment
- 1989–1993 Dodge Ram 2500 and 3500 with 5.9L Cummins 12-Valve (VE Pump)
- 1994–1998 Dodge Ram 2500 and 3500 with 5.9L Cummins 12-Valve (P7100 Pump)
- 5.9L Cummins B-Series 12-Valve Engines
- OEM timing and injection pump service procedures
Note: This timing pin is intended for timing and service procedures only. Always remove the timing pin before cranking or starting the engine. Failure to remove the pin may result in component damage.
What's Included
- Cummins 3903924 OEM Timing Pin
Specifications
- Manufacturer: Cummins
- Part Number: 3903924
- Product Type: OEM Timing Pin
- Function: Locates Top Dead Center for timing procedures
- Engine Compatibility: 5.9L Cummins B-Series 12-Valve
- Injection Pump Compatibility: VE Rotary Pump and P7100 Inline Pump
- Vehicle Compatibility: 1989–1998 Dodge Ram 2500 and 3500
- Application: Engine Timing and Injection Pump Service
- OEM Replacement: Yes
- UPC: Not Published by Cummins
- GTIN: Not Published by Cummins
Cross Reference Numbers
3903924, 3902627, M-3903924, PAI 042013, 3913994 (O-Ring), 3904849 (Retaining Ring)
FAQ
Does Cummins 3903924 fit both VE and P7100 injection pump engines?
Yes. The Cummins 3903924 timing pin is used on both 1989–1993 VE-pump engines and 1994–1998 P7100-equipped 12-valve Cummins engines.
What is the purpose of the timing pin?
The timing pin is used to locate Top Dead Center (TDC) during engine timing procedures, injection pump installation, timing adjustments, and engine rebuilds.
Can I start the engine with the timing pin installed?
No. The timing pin should only be used while manually rotating the engine during timing procedures. It must be removed before cranking or starting the engine.
Is this a genuine Cummins part?
Yes. Part number 3903924 is a genuine Cummins OEM timing pin designed to factory specifications.
Does the timing pin include the O-ring?
No. The timing pin is typically sold separately. The sealing O-ring is commonly referenced as Cummins part number 3913994.
When should the timing pin be replaced?
Replacement is recommended if the pin becomes worn, bent, damaged, missing, or broken during timing service procedures.
