Product Description
MAHLE SH-1981 Camshaft Bushing – Cummins 5.9L / 6.7L
The MAHLE (Clevite) SH-1981 is an OE-quality camshaft bushing used on late 5.9L ISB "STORM" block engines and commonly referenced for front-position cam bushings across many ISB 5.9L and 6.7L applications. It’s pre-finished for proper oil clearance, installs cleanly, and helps maintain correct cam alignment and oil film for long service life.
Why Choose MAHLE / Clevite
- OE-grade materials with proven embedability and anti-seizure characteristics.
- Pre-finished to meet factory oil-clearance targets; minimal machining required.
- Direct-fit replacement for front (Position #1) STORM block applications.
Technical Specs
| Manufacturer | MAHLE / Clevite |
|---|---|
| Part Number | SH-1981 |
| UPC / GTIN | 027067468680 |
| Position | Front cam bore (Position #1) |
| Outside Diameter | ≈ 2.340" nominal (some catalogs list ≈ 2.335") |
| Quantity Required | 1 per engine |
| Material | C-1 bearing material |
| Country of Origin | USA |
| Package Dimensions | ~3.19" W × 2.25" L × 1.25" H; ~0.22 lb gross |
Vehicle Fitment
Primary application (STORM block): 1999–2007 Dodge/Ram 2500/3500 with 5.9L Cummins (front cam bushing, Position #1, 2.340" OD). One bushing required per engine.
Also commonly referenced for: 1998.5–2018 Cummins 5.9L & 6.7L front-position cam bushing when OE number or OD matches (see Cross‑Reference & Notes). Always verify by OE part number or by measuring OD before ordering.
Fitment Notes
- STORM block note: This bushing is the front (Position #1) cam bushing used on STORM block 5.9L applications.
- 6.7L & late 5.9L: Some engines use an alternate front bushing (e.g., Cummins 4983253). Verify by VIN/OE number or by confirming ≈2.340" OD.
Cross‑Reference (Interchange)
- Cummins: 3940059 (front cam bushing), 4983253 (alt. front bushing on some engines)
- Mopar / Chrysler: 05003617AA, 5003617AA
- Sealed Power: 4207DR
- FP Diesel: FP3940059
Related / Alternatives (Internal Links)
- Cummins 3940059 Camshaft Bushing (OE)
- Cummins 4983253 Camshaft Bushing (OE alt.)
- 03–07 Cummins 5.9L Camshafts & Valve Train
Installation Notes
- Press-fit the bushing squarely; align oil feed hole(s) precisely with block passages.
- Lightly lubricate during install; verify camshaft journal clearance per Cummins spec.
- After install, confirm cam end-play, rotate by hand to ensure no binding.
Warranty
12-month manufacturer warranty against defects (standard aftermarket terms).
FAQ
How many of these do I need?
Typically one (front position) per engine. Some performance builds add additional bushings—verify your build requirements.
Will SH-1981 fit my 6.7L?
Many catalogs cross-reference SH-1981 with Cummins 3940059, which is used on numerous 5.9L and 6.7L applications. Some 6.7L engines, however, use 4983253. Match your VIN/OE number or confirm ≈2.340" OD before ordering.
Is machining required?
SH-1981 is pre-finished to OE clearances; in most stock rebuilds, no additional machining is required if bores and alignment are correct.
What does “STORM block” mean here?
It’s the Cummins 5.9L block variant where the front cam bushing (Position #1) uses this ~2.340" OD bushing. Measure and verify if uncertain.
What’s the UPC/GTIN?
027067468680.
