What is the size of these bearings?

These ACL main bearings are undersized by 0.010 inches. This size is typically used when the crankshaft has been ground down to a specific undersize to correct for wear or damage.

Why are crankshaft main bearings important?

Crankshaft main bearings are crucial for engine health. They support the crankshaft, allowing it to rotate smoothly within the engine block while handling immense loads and reducing friction.

Do these bearings come with installation instructions?

While specific installation instructions are not included, it is highly recommended to refer to the manufacturer's official service manual for your 1979 Ford Mustang. Proper installation and the use of assembly lube are critical for engine longevity.

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Est. 1957

Specifications

Brand: ACL
Part #: 5M1743A-.25

ACL Ford Prod. 4 140 1989-97 Engine Crankshaft Main Bearing Set

Name: ACL Ford Prod. 4 140 1989-97 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-prod-4-140-1989-97-engine-crankshaft-main-bearing-set-t14-630572
Price: 28.16 USD
Availability: BackOrder

$28.16

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1979 Ford Mustang crankshaft main bearings by ACL. Part# 5M1743A-.25. Undersize 0.010 inch. Direct fit. Fast shipping.

Key Features

Fits 1979 Ford Mustang.
Crankshaft main bearing set.
Undersize 0.010 inch.
Brand: ACL
Part Number: 5M1743A-.25

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About this part

Product Details

This is a set of crankshaft main bearings for your 1979 Ford Mustang. These bearings sit between the crankshaft and the engine block, allowing the heavy crankshaft to spin smoothly while supporting its weight. When these bearings wear down, they can cause increased friction, oil pressure loss, and eventually, serious engine damage. This ACL set is made to the original specifications, ensuring a proper fit and function for your specific engine.

This particular set is undersized by 0.010 inches, which is important if your crankshaft has been previously machined or ground down to correct for wear. Always confirm the required bearing size for your engine build. Proper installation is key to engine longevity, so make sure to follow the manufacturer's instructions and use the correct assembly lube.