Product Description
Interstate-McBee M-3900299 Valve Spring Retainer – 89–98 5.9L Cummins 12V
OEM-style valve spring retainer for the 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 12-valve (6BT). Built to OE form, fit, and function for reliable valve-train service. Sold individually (order the quantity required for your engine).
- Direct replacement: Installs in the factory location; OE-equivalent performance.
- Precision fitment: Matches Cummins reference 3900299 for B-series applications.
- Service-friendly: Pair with valve spring keepers (M-3900250) and stock valve springs for a complete refresh.
- Proven aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.
Specifications
| Interstate-McBee P/N | M-3900299 |
|---|---|
| OEM Reference | Cummins 3900299 |
| Cross References | PAI 192059 / 192059E; Excel 192059E |
| Approx. Dimensions | 1.342" OD × 0.567" height |
| Approx. Unit Weight | 0.02 lb (retainer) |
| Sold As | Each (1 retainer) |
| Qty Required Per Engine | 12 retainers (one per valve on 12-valve engines) |
| Engine Family | Cummins B-Series (4B/6B); primary on 5.9L 12-valve 6BT |
| Position | Valve spring retainer (valve train) |
What’s Included
- (1) Valve spring retainer M-3900299
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins (12-valve 6BT)
- Model Years: 1989–1998
- Additional Applications: Select Cummins 4B/6B industrial and commercial engines (dimensions match Cummins 3900299; confirm by ESN).
Install Notes
- Use a proper valve spring compressor; wear eye protection.
- Inspect valve locks/keepers (replace with M-3900250 if worn); verify installed height and retainer seating.
- Service one valve at a time to maintain orientation; follow the Cummins service manual.
Warranty
New replacement part with manufacturer warranty coverage. Contact us for specific terms for valve-train components.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists.
- Fast shipping, easy returns, and competitive pricing.
- Deep inventory of complementary B-series valve-train parts.
FAQ
Will this retainer fit my 1989–1998 5.9L Cummins?Yes. It’s listed for 1989–1998 Dodge Ram 5.9L Cummins 12-valve applications. Verify by ESN for any edge cases.
How many retainers do I need?
The 5.9L 12-valve uses 12 retainers (one per valve). Retainers are sold individually.
Are the keepers/locks included?
No. Order M-3900250 valve spring keepers separately if your originals are worn or missing.
Does this fit 24-valve (1998.5–2002) engines?
No. This listing is for the 12-valve 5.9L only. 24-valve ISB engines use different valve-train components.
Product Videos
Custom Field
YEAR 1989-1998
MAKE DODGE
ENGINE 5.9L
