What is the purpose of crankshaft main bearings?

Crankshaft main bearings sit between the crankshaft and the engine block. Their main job is to reduce friction and support the crankshaft as it spins, ensuring smooth engine operation and preventing wear.

What does 'half groove' mean for these bearings?

The 'half groove' refers to the oil groove machined into the bearing shell. This groove helps to distribute lubricating oil more evenly around the crankshaft journal, which is important for consistent lubrication and reducing wear, especially in higher-performance engines.

Are these bearings a direct fit for my 1970 Ford Country Sedan?

Yes, this ACL crankshaft main bearing set (Part# 5M1432A-30) is designed as a direct fit for the 1969-1974 Ford Country Sedan with the specified V8 engines.

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Trusted Since 1957

Est. 1957

Specifications

Brand: ACL
Part #: 5M1432A-30

ACL Ford V8 351M-351W-400 1969-98 (Half Groove) Engine Crankshaft Main Bearing Set

Name: ACL Ford V8 351M-351W-400 1969-98 (Half Groove) Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-v8-351m-351w-400-1969-98-half-groove-engine-crankshaft-main-bearing-t14-630986
Price: 34.93 USD
Availability: BackOrder

$34.93

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 crankshaft main bearings for Ford V8 351M-351W-400 engines.

Key Features

Fits 1969-1974 Ford Country Sedan.
Designed for Ford V8 351M, 351W, and 400 engines.
Features half-groove design for improved oil distribution.
Direct replacement for your stock crankshaft main bearings.
Well-built by ACL, a trusted name in engine components.

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About this part

Product Details

Already running a built Ford V8? This crankshaft main bearing set from ACL is the next piece of the puzzle for your 351M, 351W, or 400 engine. These bearings are crucial for keeping your crankshaft spinning smoothly within the engine block, reducing friction and wear. ACL has been making engine bearings for a long time, and they're known for well-built parts that hold up.

This particular set features half-grooves, which helps distribute oil more evenly around the crankshaft journal. This is especially important in performance applications where oil flow can be critical. They are designed as a direct replacement for your stock bearings, making installation straightforward if you're already inside the engine for a rebuild or major service. Getting the right bearings in place is key to a long-lasting engine build.