MAHLE CB-1398H Engine Connecting Rod Bearing Pair

The MAHLE CB-1398H is a connecting rod bearing pair engineered for GM/Buick gasoline engines from the late 1970s through the late 1980s. MAHLE is a globally recognized OEM-level supplier, and this bearing set is manufactured to precise dimensional tolerances to ensure proper oil film retention, load distribution, and long-term crankshaft and rod journal protection.

These bearings are designed as a direct-fit replacement, restoring proper clearances in worn or rebuilt engines. The tri-metal or bimetal construction typical of MAHLE rod bearings provides excellent wear resistance, fatigue strength, and compatibility with both conventional and synthetic engine oils.

Key Features:

• OEM-quality connecting rod bearing pair for GM engines
• Precision-engineered to meet or exceed original equipment specifications
• Designed for Buick/GMC 181 (3.0L), 196 (3.2L), 231 (3.8L), and 252 (4.1L) engines
• Application range: 1978–1989
• Ensures correct oil clearance for optimal crankshaft lubrication
• Manufactured by MAHLE, a trusted global OEM engine parts supplier
• Direct replacement — no modification required

MAHLE part number CB-1398H is sold as a pair (two half-shell bearings for one connecting rod journal). Ideal for engine rebuilds, overhauls, or any bottom-end service requiring rod bearing replacement on these classic GM powerplants.