Product Description
Interstate-McBee M-3900919 Connecting Rod Cap Screw – 1989–2002 5.9L Cummins (12V & 24V)
OE-style connecting rod cap screw for the 5.9L Cummins B-Series (Dodge Ram 2500/3500, 1989–2002). Built to OE form, fit, and function for dependable bottom-end service. Sold individually.
- Direct replacement: Matches OE geometry and thread specification for proper clamping of the rod cap to the rod.
- Durable construction: Quality materials and finish for consistent preload and service life.
- Service friendly: Ideal for stock rebuilds and routine bottom-end refreshes.
- Value: Interstate-McBee quality at a fraction of OEM boxed pricing.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3900919 |
| OEM Reference | Cummins 3900919 |
| Sold As | Each (1 cap screw) |
| Qty Required (per engine) | 12 cap screws (2 per connecting rod) |
| Position | Connecting rod cap fastener (bottom end) |
What’s Included
- (1) Connecting rod cap screw, P/N M-3900919
Vehicle/Engine Fitment
Always verify by engine serial number (ESN) when possible.
- 5.9L Cummins B-Series (6BT / ISB)
- Model Years: 1989–2002
- Valvetrain: 12-valve (1989–1998) and 24-valve (1998.5–2002)
- Additional B-Series applications where Cummins 3900919 is specified (confirm by ESN).
Recommended/Related Service Parts
- Connecting rod bearings (standard or oversize as required)
- Main bearing set
- Oil pump & pickup tube gasket
- Front & rear main seals
- Assembly lube and thread prep per Cummins procedures
Install Notes
- Clean threads in the rod/rod cap; inspect for stretch or damage. Replace any fastener that shows corrosion, galling, or abnormal elongation.
- Tightening: Follow the Cummins service manual for your specific ESN for torque/angle, lubricant, and reuse limits. Do not substitute specs.
- Verify bearing clearances and rod side clearance; torque in stages and in the specified sequence.
- Rotate the engine by hand to confirm smooth operation before startup.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, competitive pricing
- Deep inventory of complementary B-Series bottom-end parts
FAQ
How many cap screws does my 5.9L need?
There are 6 connecting rods and each uses 2 cap screws—12 total. This item is sold individually so order the quantity you need.
Are these torque-to-yield (stretch) bolts?
Refer to your Cummins service manual for your ESN. Follow the specified torque/angle or stretch method and reuse guidance for your exact application.
Does this fit the 6.7L or 2003+ ISB?
This listing is for 1989–2002 5.9L applications. For later engines, confirm by ESN and applicable Cummins part number.
