What is the main function of crankshaft main bearings?

Crankshaft main bearings are located between the crankshaft and the engine block. They allow the crankshaft to spin smoothly while supporting its weight and handling the forces generated during combustion and power delivery.

Why is proper oil clearance important for these bearings?

Proper oil clearance ensures that a thin film of oil can circulate between the bearing and the crankshaft. This oil film reduces friction, dissipates heat, and prevents metal-on-metal contact, which is vital for engine longevity.

Does this bearing set include everything needed for installation?

This is a set of crankshaft main bearings. You will need to refer to the manufacturer's installation instructions for any additional hardware, sealants, or specific procedures required for proper installation.

1979 Ford Mustang Crankshaft Main Bearings | ACL 5M1117A-STD

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-t14-631512
Price: 32.56 USD
Availability: BackOrder

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

$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 bearings help keep your engine running smoothly.

Key Features

Fits 1979 Ford Mustang.
ACL crankshaft main bearing set.
Designed to support the crankshaft and manage oil clearance.
Multi-layer material for wear resistance.

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Product Details

Already running a modified engine or just doing a full rebuild on your 1979 Mustang? This ACL crankshaft main bearing set is a crucial component for ensuring your engine's bottom end stays healthy and performs as it should. These bearings sit between the crankshaft and the engine block, allowing the crank to spin freely while supporting its weight and the forces it endures during operation.

ACL has been making engine bearings for a long time, and this set is built to handle the demands of a performance or rebuilt engine. They're made with a multi-layer material that's designed for good wear resistance and to maintain proper oil clearance, which is critical for keeping friction down and heat managed. Getting the right bearing clearance is key, especially if you've already upgraded other engine components. This set is designed as a direct replacement, making installation straightforward when you're already deep into the engine.

When you're putting an engine back together, especially if it's been bored or the crank has been machined, having a fresh set of quality bearings like these from ACL is essential. Make sure to follow the manufacturer's lubrication and installation procedures carefully to get the most out of them.