What is the difference between standard and undersize bearings?

Standard (STD) bearings are made to the original factory specifications. Undersize bearings, like -010 or -020, are used when the crankshaft journals have been machined down to remove damage or wear. This set is standard size, intended for use with a crankshaft that is still within factory tolerances.

Do these bearings come with installation instructions?

This bearing set is designed as a direct replacement part. For specific installation procedures, torque specifications, and oil clearance measurements, always refer to the manufacturer's official service manual for your vehicle.

What else might I need when installing main bearings?

When replacing main bearings, it's common practice to also inspect and potentially replace rod bearings, piston rings, and engine seals. Ensure you have the proper assembly lube and torque wrench for accurate installation.

Specifications

Brand: ACL
Part #: 4M2006A-STD

ACL Ford Tr. V6 177-244 1990-97 Engine Crankshaft Main Bearing Set

Name: ACL Ford Tr. V6 177-244 1990-97 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-tr-v6-177-244-1990-97-engine-crankshaft-main-bearing-set-t14-630513
Price: 25.11 USD
Availability: BackOrder

$25.11

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Fits 1990-2011 Ford Ranger. ACL crankshaft main bearings for your 4.0L V6 engine. Direct fit replacement.

Key Features

Fits 1990-2011 Ford Ranger, 1997-2010 Ford Explorer, 2001-2005 and 2008-2010 Ford Explorer Sport Trac, and 1998-2002 and 2004-2010 Mercury Mountaineer.
Designed for 4.0L V6 SOHC engines (VIN E, K, X).
Standard size (STD) main bearing set.
Direct replacement for original equipment bearings.
Well-built to support the crankshaft and reduce friction.

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About this part

Product Details

ACL has been making engine bearings for decades, and this crankshaft main bearing set for your 4.0L V6 Ford Ranger is one of their staples. These bearings are crucial for keeping your engine running smoothly by supporting the crankshaft and reducing friction within the engine block. If you're rebuilding your engine or replacing worn-out components, a fresh set of main bearings is a solid choice to ensure proper oil clearance and long-term reliability.

This set is built to meet the original equipment specifications for your 4.0L V6 engine, whether it's a VIN E, K, or X. They are designed as a direct replacement, meaning they fit right into place without modification. Proper installation and adherence to oil clearance specifications are key to getting the most out of these well-built bearings.

When you're deep into an engine build or repair, having reliable parts like these ACL main bearings makes a big difference. They are a popular choice for many mechanics and DIYers working on Ford Ranger, Explorer, and Mercury Mountaineer models from the early 90s through the early 2010s.