Product Description
Interstate-McBee M-68138 Vacuum Pump Male Connector – 94–98 5.9L Cummins (12V)
OE-style vacuum pump block oil line fitting (male connector) for 1994–1998 Dodge Ram 2500/3500 with 5.9L Cummins 12-valve. This Interstate-McBee aftermarket replacement matches OEM form and function for a reliable, leak-free connection at the vacuum pump oil feed.
- Direct replacement: Matches the OEM Cummins fitting for a precise, hassle-free install.
- Durable construction: Built to withstand heat, vibration, and oil exposure.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM-boxed pricing.
- Application-correct: Designed for 2nd-gen 5.9L Cummins (1994–1998, 12V).
Specifications
| Manufacturer | Interstate-McBee |
|---|---|
| Part Number | M-68138 |
| OEM Cross-Reference | Cummins 68138 |
| Location | Vacuum pump oil feed connection (block to pump) |
| Type | Male connector / block oil line fitting |
| Quantity | Sold individually (1 required) |
Vehicle Fitment
Always verify by engine serial number (ESN) for best results.
- Dodge Ram 2500/3500 – 5.9L Cummins 12-Valve (2nd Gen)
- Model Years: 1994, 1995, 1996, 1997, 1998
- Fitment notes: Not for early 1st-gen 1989–1993 applications. 1998.5+ 24-valve ISB uses different plumbing. Verify thread style before install.
What’s Included
- (1) Interstate-McBee M-68138 vacuum pump male connector
Install Tips
- Clean mating threads; inspect oil line flare/seat. Do not cross-thread.
- Tighten per Cummins service manual; do not over-torque.
- Prime/bleed as required, then check for leaks after warm-up.
Cross-Reference
Direct aftermarket alternative to Cummins 68138. Names you may see: “vacuum pump block oil line fitting,” “vacuum pump male connector.”
Why Buy From CPP Diesel
- Application-specific listings for 5.9L Cummins with expert ESN support.
- Fast shipping and easy returns.
- Real diesel techs available for install and fitment guidance.
FAQ
Will this fit my 1989–1993 5.9L?No. This connector is for 1994–1998 12-valve applications. Earlier 1989–1993 setups use different hardware; verify by ESN for the correct part.
Is this the same as Cummins 68138?
Functionally yes—this Interstate-McBee part is an OE-style aftermarket replacement that cross-references to Cummins 68138.
Do I need thread sealant?
Follow the Cummins service manual for your exact configuration. Many oil line fittings seal on the flare/seat; avoid contaminating oil passages with sealant.
Any torque spec guidance?
Always use the Cummins service manual torque values and procedures for your ESN to prevent damage or leaks.
Product Videos
Custom Field
YEAR 1989-1998
MAKE DODGE
ENGINE 5.9L
