What is the purpose of the 'half-groove' design on these bearings?

The half-groove design on these ACL main bearings helps to ensure a more consistent flow of oil to the crankshaft journals. This is important for maintaining proper lubrication and oil pressure throughout the engine's rotation, especially under load.

Do these bearings come with installation instructions?

While these bearings are designed as a direct replacement, it is always recommended to refer to the manufacturer's official service manual for detailed installation procedures. Proper assembly and lubrication are critical for bearing longevity.

What other engine components should I inspect when replacing main bearings?

When replacing main bearings, it's crucial to inspect the crankshaft journals for any signs of wear, scoring, or damage. You should also check the connecting rod bearings and ensure the oil pump is functioning correctly to provide adequate lubrication.

Specifications

Brand: ACL
Part #: 5M1432A-20

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-t14-630550
Price: 34.93 USD
Availability: BackOrder

$34.93

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Fits 1969-1974 Ford Country Sedan. ACL (Half Groove) Engine Crankshaft Main Bearing Set for Ford V8 351M-351W-400 engines.

Key Features

Fits 1969-1974 Ford Country Sedan.
Designed for Ford V8 351M, 351W, and 400 engines.
Half-groove design helps maintain consistent oil pressure.
Durable materials reduce friction and protect the crankshaft.
Direct replacement for straightforward installation.

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About this part

Product Details

When you're rebuilding or refreshing a Ford V8 engine like the 351M, 351W, or 400, the crankshaft main bearings are critical. These ACL (Half Groove) main bearings, part number 5M1432A-20, are made specifically for your 1969-1974 Ford Country Sedan. They're designed to handle the demands of these classic V8s, ensuring smooth rotation and proper oil flow for the crankshaft.

ACL has been making engine bearings for a long time, and they know what it takes to keep these engines running. These bearings feature a half-groove design, which helps maintain consistent oil pressure and distribution to the crankshaft journals, especially important in performance applications or when dealing with slightly worn components. The material composition is chosen for durability and low friction, helping to protect your crankshaft and extend the life of your engine rebuild.

When installing new main bearings, it's always a good idea to check your crankshaft journals for any imperfections and ensure they are clean. Proper oiling during assembly is also key to their longevity. This set is designed as a direct replacement, making the installation process as straightforward as possible for your Ford V8.