What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while handling the weight and forces acting upon it, ensuring proper oil clearance for lubrication.

Why is it important to replace main bearings during an engine rebuild?

Replacing main bearings during an engine rebuild is crucial for establishing correct oil clearances. Worn bearings can lead to excessive clearance, oil pressure loss, and premature engine failure. New bearings ensure the crankshaft is properly supported and lubricated.

What material are these ACL main bearings made from?

These ACL main bearings are constructed from well-built materials specifically chosen for their ability to withstand the high pressures and temperatures found within an engine's rotating assembly.

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Trusted Since 1957

Est. 1957

Specifications

Brand: ACL
Part #: 5M1117A-10

ACL Ford Prod. 4 122-140 1974-90 Engine Crankshaft Main Bearing Set

Name: ACL Ford Prod. 4 122-140 1974-90 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-prod-4-122-140-1974-90-engine-crankshaft-main-bearing-set-t14-630659
Price: 32.56 USD
Availability: BackOrder

$32.56

On Backorder

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

Fits 1979 Ford Mustang. ACL crankshaft main bearing set for engine rebuilding.

Key Features

Fits 1979 Ford Mustang.
Crankshaft main bearing set for engine rebuilding.
Designed to meet original equipment specifications.
Well-built materials for durability.

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About this part

Product Details

Doing an engine rebuild on your 1979 Ford Mustang? This ACL Crankshaft Main Bearing Set is a key component for getting your engine back in shape. These bearings sit between the crankshaft and the engine block, allowing the crankshaft to spin smoothly while supporting its weight. When you're rebuilding the bottom end, replacing these is a critical step for ensuring proper oil clearance and long-term engine health.

ACL has been making engine bearings for a long time, and this set is built to meet the original specifications for your Mustang's engine. They're made from a well-built material designed to handle the pressures and temperatures inside the engine. Proper installation with the correct oil clearances is essential for these bearings to perform as expected and last for many miles.