What is the main function of main bearings?

Main bearings support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly at high speeds, which is essential for engine operation.

What does 'medium level of eccentricity' and 'high crush' mean for these bearings?

Eccentricity refers to how the bearing's inner diameter deviates slightly from a perfect circle, which helps with oil distribution. High crush means the bearing is designed to be slightly compressed when installed, ensuring a tight fit and good contact with the engine block.

Are these bearings suitable for a stock engine rebuild?

These H-Series bearings are recommended for engines that run in the medium to high RPM range and often used with performance builds. For a standard, lower-RPM rebuild, other bearing series might be more appropriate, so check with your engine builder.

Specifications

Brand: Clevite
Part #: MS1038HC
UPC: 639789292438

Clevite Chevrolet Pass & Trk 400 V8 1970-80 Main Bearing Set

Name: Clevite Chevrolet Pass & Trk 400 V8 1970-80 Main Bearing Set
Brand: Clevite
SKU: clevite-clevite-chevrolet-pass-trk-400-v8-1970-80-main-bearing-set-t14-483865
Price: 181.21 USD
Availability: BackOrder

$181.21

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Clevite H-Series Main Bearing Set MS1038HC for Chevrolet and GMC V8 engines 1970-1980. Features hardened steel back and thin overlay.

Key Features

Fits 1970-1980 Chevrolet and GMC vehicles with a 400 V8 engine.
H-Series main bearings feature a medium level of eccentricity and high crush for better seating.
Constructed with a hardened steel back and a thin overlay.
Made without flash plating to ensure improved seating against the crankshaft.
Recommended for engines operating in the medium to high RPM range.
Designed to be used with crankshafts that have oversize fillets.

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About this part

Product Details

This is a Clevite H-Series Main Bearing Set, part number MS1038HC. You get a complete set of main bearings designed for Chevrolet and GMC vehicles with a 400 V8 engine from 1970 to 1980. These bearings are crucial for supporting the crankshaft and ensuring it spins smoothly within the engine block.

Clevite's H-Series bearings are built with a medium level of eccentricity and high crush, which helps them seat properly. They feature a hardened steel back and a thin overlay, and are made without flash plating to improve seating against the crankshaft. These are a solid option for engines that see medium to high RPM ranges, especially when paired with crankshafts that have oversize fillets.

This set fits a wide range of popular Chevrolet and GMC trucks and passenger cars from the early 70s through 1980, including models like the Chevrolet Impala, C10, and GMC C1500. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.