What is the difference between standard and undersize bearings?

Standard size bearings are used when the crankshaft journals are still at their original factory dimensions. Undersize bearings are used when the crankshaft journals have been machined down to correct for wear or damage.

What material are these ACL main bearings made from?

These ACL main bearings are constructed from a tri-metal material, which is known for its strength and wear resistance in high-pressure engine applications.

Do I need to lubricate these bearings before installation?

Yes, it is critical to lubricate the bearing surfaces with a quality engine assembly lubricant before installing them. This ensures proper oil film formation and prevents damage during initial engine startup.

1979 Ford Mustang Crankshaft Main Bearings | ACL 5M1743A-STD

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-t14-630660
Price: 28.16 USD
Availability: BackOrder

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

$28.16

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 your 4-cylinder engine. Essential for proper crankshaft support.

Key Features

Fits 1979 Ford Mustang.
Standard size crankshaft main bearing set.
Designed for Ford 4-cylinder engines.
Tri-metal material construction for durability.
Helps reduce friction and heat buildup.

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Product Details

200,000 psi tensile strength puts these ARP studs well above stock hardware. When you're rebuilding or just refreshing the engine in your 1979 Ford Mustang, especially if it's the 4-cylinder model, getting the crankshaft main bearings right is crucial. These ACL main bearings are built to handle the demands of your engine, providing the necessary support for the crankshaft to spin smoothly and efficiently. They are designed to replace the original bearings, ensuring a proper fit and function within the engine block.

ACL has been making engine bearings for a long time, and these are well-built for the job. They are made from a tri-metal material that offers good strength and wear resistance, which is important for the high-pressure environment where the crankshaft rides. This material helps to reduce friction and heat buildup, contributing to the longevity of your engine. When installing these, make sure to follow the manufacturer's lubrication and torque specifications to get the best performance and life out of them.

This set includes all the main bearings you'll need for your 4-cylinder engine. It's a standard size, meaning it's meant to be used when the crankshaft journals are still within their original factory specifications. If your crankshaft has been machined undersize due to wear or damage, you would need a different size bearing set.