What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly while maintaining precise oil clearances, which are critical for oil pressure and lubrication.

Are these bearings undersized or oversized?

This is a standard size bearing set. If your crankshaft has been machined (ground), you will need to order the corresponding undersize bearings (e.g., -010, -020) to ensure proper clearance.

What else might I need when installing main bearings?

When installing main bearings, it's essential to have assembly lube to coat the bearings and crankshaft journals before installation. You'll also need to verify oil clearances with Plastigage and ensure your crankshaft is clean and free of damage.

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Specifications

Brand: ACL
Part #: 5M1010A-20

ACL Ford Prod. V8 351C-351CJ 1970-74 Engine Crankshaft Main Bearing Set

Name: ACL Ford Prod. V8 351C-351CJ 1970-74 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-prod-v8-351c-351cj-1970-74-engine-crankshaft-main-bearing-set-t14-632233
Price: 37.52 USD
Availability: BackOrder

$37.52

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1969-1974 Ford Country Sedan. ACL main bearings for 351C-351CJ V8 engines. Ensures proper crankshaft support for reliable engine operation.

Key Features

Fits 1969-1974 Ford Country Sedan.
Designed for Ford 351C and 351CJ V8 engines.
Maintains proper crankshaft support and oil clearance.
Helps reduce friction and wear within the engine.
Well-built for reliable engine operation.

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About this part

Product Details

A worn-out engine bearing means your engine might knock, lose oil pressure, or worse, seize up. This ACL main bearing set is built to keep your 1969-1974 Ford Country Sedan with a 351C or 351CJ V8 running smoothly. These bearings are crucial for supporting the crankshaft, allowing it to spin freely while maintaining the correct oil clearance.

ACL has been making engine bearings for a long time, and this set is made to meet the demands of your classic Ford. They're designed to fit right into your existing engine block, making installation straightforward for someone familiar with engine work. Proper installation ensures the crankshaft stays centered and lubricated, which is key to getting the most life out of your engine.

When you're rebuilding or refreshing your V8, using a well-built set of main bearings like these from ACL is a smart move. They help maintain consistent oil pressure across the engine and reduce friction, which is essential for performance and longevity.