Product Description
Interstate-McBee M-4955853 Main Bearing Set – Standard Size – 89–18 5.9L / 6.7L Cummins
Premium aftermarket main bearing set by Interstate-McBee, engineered for 1989–2018 Cummins B-Series diesel engines (5.9L 12V, 24V, and 6.7L). Manufactured to meet or exceed OEM tolerances for long service life and consistent oil film integrity. Standard size set for standard crankshaft journals.
- OE Reference: Cummins 4955853 (Standard Size)
- Applications: 5.9L (12-Valve & 24-Valve) and 6.7L Cummins B-Series engines
- High-grade overlay: Precision tri-metal design for strength and conformability
- Oil groove design: Matches OE specification for consistent lubrication
- Includes: Upper and lower main bearings for all journals
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4955853 |
| OEM Reference | Cummins 4955853 |
| Engine Family | 5.9L / 6.7L Cummins B-Series (1989–2018) |
| Size | Standard |
| Material | Tri-metal (steel-backed copper/lead alloy) |
| Sold As | Complete set (all main bearings) |
What’s Included
- Complete set of upper and lower main bearings for all journals
- Packaging: Interstate-McBee boxed kit
Vehicle / Engine Fitment
Verify by engine serial number (ESN) whenever possible.
- Cummins 5.9L 12-Valve (1989–1998)
- Cummins 5.9L 24-Valve (1998.5–2007)
- Cummins 6.7L 24-Valve (2007.5–2018)
- Industrial and marine B-Series variants where 4955853 standard bearing set is specified
Related Products
- Interstate-McBee M-3802151 Rod Bearing Set – Standard
- Interstate-McBee M-3939859 Thrust Bearing
- Interstate-McBee M-3802364 Main Bearing Set – .010 Undersize
- Interstate-McBee M-3802365 Main Bearing Set – .020 Undersize
Installation Notes
- Always inspect crankshaft journals for scoring or taper before installation.
- Verify oil clearance using plastigage or micrometers per Cummins specifications.
- Lubricate bearing surfaces with assembly lube prior to assembly.
- Torque main bolts to factory specification and recheck after rotating the crankshaft.
Why Choose Interstate-McBee
- Precision manufacturing in ISO-certified facilities
- Trusted aftermarket replacement for OEM Cummins parts
- Backed by industry-leading warranty and field support
FAQ
Is this a standard-size bearing set?
Yes, this kit is for a standard crankshaft. If your crank has been ground undersize, choose the .010, .020, or .030 set instead.
Will it fit my 6.7L Cummins?
Yes—fits 2007.5–2018 6.7L engines using standard main bearings (Cummins 4955853 spec).
Are thrust bearings included?
No, order thrust bearings separately (see part M-3939859).
Is this an Interstate-McBee manufactured kit?
Yes—packaged and quality-controlled by Interstate-McBee, USA.
