Product Description
Genuine Johnson OE-312M X10 Connecting Rod Bearing Set (NORS)
Restore the high-torque performance of your vintage GMC workhorse with this premium NORS (New Old Replacement Stock) Rod Bearing Set by Johnson. Specifically engineered for the GMC truck V8 family of the mid-1950s, this set provides a precision fit for the Pontiac and Oldsmobile-derived powerplants used in medium and heavy-duty series. This set covers an essential range of displacements from the 288 cubic inch V8 up to the high-displacement 347. Proudly made in the USA, these bearings are critical for restoring proper crankshaft journal protection and maintaining consistent oil pressure in classic GMC "Blue Chip" series trucks. These bearings are finished to a .010" (X10) undersize, requiring the crankshaft journals to be ground to match for a professional-grade engine overhaul that meets original equipment standards.
Key Features:
- Brand: Johnson
- Part Number: OE-312M
- Position: Connecting Rod Bearings
- Includes: Set of (8) OE312M-X10 bearings
- Engine Fitment: GMC Truck V8 (288, 316, 324, 347 CID)
- Size: .010" Undersize (X10)
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make | Engine Displacement | Year Range | Model / Series Notes |
|---|---|---|---|
| GMC Truck | 324 / 324D V8 | 1954-1956 | Oldsmobile-derived V8 |
| GMC Truck | 288 / 288A / 288D V8 | 1955-1956 | Pontiac-derived V8 |
| GMC Truck | 316 V8 | 1955-1956 | Pontiac-derived V8 |
| GMC Truck | 347 / 347A / 347B V8 | 1957 | Pontiac-derived V8 |
Fits Years:
1954 1955 1956 1957
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Unbeatable Prices & Expectations
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
