Product Description
The CUMMINS 3931623 OEM VALVE TAPPET (LIFTER) is designed for 1989–1998 5.9L 6BT and 3.9L 4BT Cummins diesel engines. This genuine Cummins valve tappet, also known as a lifter or cam follower, is built to restore proper valve train operation while maintaining OE fitment, durability, and reliability.
Use this part when servicing valve train components, replacing a camshaft, repairing lifter wear, or rebuilding a Cummins B-Series diesel engine. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM replacement valve tappet
- Direct-fit replacement lifter / cam follower
- Designed for 1989–1998 Cummins 6BT and 4BT applications
- Helps restore proper valve train operation
- Manufactured to Cummins OEM specifications
- Recommended for maintenance, repair, or engine rebuild work
- Sold individually
FITMENT
- 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 6BT
- 1989–1998 Cummins 4BT 3.9L diesel engines
- Select Cummins B-Series industrial and agricultural applications
WHAT'S INCLUDED
- 1 Cummins 3931623 OEM Valve Tappet (Lifter)
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3931623
- Cummins 3915517
- Cummins 3923478
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3931623
- Part Type: Valve Tappet / Lifter
- Engine Compatibility: 5.9L 6BT Cummins, 3.9L 4BT Cummins
- Fitment Years: 1989–1998
- Vehicle Application: Dodge Ram 2500/3500 and Cummins Industrial Applications
- Condition: New OEM Cummins
- Quantity: Sold Individually
- Typical Quantity Per Engine: 12 (6BT) / 8 (4BT)
FAQ
Will this part fit my truck?
This part fits the applications listed above, including 1989–1998 5.9L 12-valve Cummins engines. Always verify your engine serial number before ordering.
Is this a direct replacement?
Yes. Cummins 3931623 is designed as a direct-fit OEM replacement valve tappet for the listed applications.
What is included?
This listing includes one Cummins 3931623 OEM valve tappet.
How many tappets are needed for a complete engine set?
Most 5.9L 6BT engines require 12 tappets, while most 3.9L 4BT engines require 8 tappets. This part is sold individually.
Should tappets be replaced when replacing a camshaft?
Replacing tappets during camshaft replacement is recommended to help ensure proper wear patterns and long service life.
Do I need any related parts?
Inspect the camshaft, pushrods, rocker components, seals, and related valve train hardware during installation and replace worn parts as necessary.
