Product Description
MAHLE SS45903 is an OE-quality intake valve stem oil seal set for the 1998.5–2002 5.9L 24-valve Cummins ISB. Positive-type, metal-shell seals with molded rubber provide precise oil control and long service life. Set includes 12 intake seals (one per intake valve). Exhaust seals are sold separately.
- Application: 5.9L Cummins ISB 24V (1998.5–2002), Dodge Ram 2500/3500
- Type: Positive-style intake valve stem seals
- Material: Metal shell with molded rubber
- Qty in set: 12 (intake side)
- Note: Fits engines up to serial number 46239409
Fitment
- 1998.5, 1999, 2000, 2001, 2002 Dodge Ram 2500 / 3500 with 5.9L Cummins 24-valve (ISB)
Cross Reference Numbers
- MAHLE: SS45903
- Common OE intake seal reference seen for 1998–2002 24V: Cummins 3942989 (verify by engine serial number).
What’s Included
12 intake valve stem oil seals (intake side only). No tools or exhaust seals included.
FAQ
Does this kit include both intake and exhaust seals?
No. This set covers intake seals only (12 pcs). Exhaust seals are sold separately.
Will it fit my 2001 Ram 2500 24-valve?
Yes, if your 5.9L ISB is within the 1998.5–2002 range and below engine serial number 46239409.
Why positive-style seals?
Positive seals meter oil precisely at the valve guide to reduce oil consumption and carbon buildup, improving longevity and emissions.
Do I need special surface prep?
Inspect guides and stems, and install with the proper driver. Lightly lubricate to avoid damage on installation.
