What does the '+0.040" O/W FLANGE' designation mean for these bearings?

This designation means the bearings are sized to fit a crankshaft that has been machined to be 0.040 inches larger in flange diameter than the standard size. It's crucial that your crankshaft has been precisely machined to this size before installing these bearings.

What engines are covered by this bearing set?

This set is specified for 1975-1977 Buick Regal with 231ci 3.8L engines, 1988-1990 Buick Riviera with 3800 Type C engines, and 1966-1967 Jeep Jeepster with 225 engines.

Do these bearings come with installation instructions?

While this set includes the bearings, it does not come with installation instructions. It is recommended to consult your vehicle's factory service manual for proper installation procedures and torque specifications.

1975-1977 Buick Regal Crankshaft Main Bearings

Name: ACL 4M960P + .040 O/W FLANGE Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-4m960p-040-o-w-flange-engine-crankshaft-main-bearing-set-t14-632127
Price: 31.53 USD
Availability: BackOrder

ACL 4M960P + .040 O/W FLANGE Engine Crankshaft Main Bearing Set

$31.53

On Backorder

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

Fits 1975-1977 Buick Regal. ACL 4M1690P-30 crankshaft main bearing set. These are 0.040 inch over bearings.

Key Features

Fits 1975-1977 Buick Regal.
Includes crankshaft main bearings sized 0.040 inch overflange.
Designed for 231ci 3.8L engines in 1975-1977 Buick Regal.
Also fits 1988-1990 Buick Riviera (3800 Type C) and 1966-1967 Jeep Jeepster (225 engines).
ACL brand part number 4M1690P-30.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

This is a set of crankshaft main bearings from ACL, specifically sized at 0.040 inches over the standard flange length. These bearings are crucial for the proper rotation and support of your engine's crankshaft. If you're rebuilding or repairing an engine for a 1975-1977 Buick Regal, or other compatible models like the Buick Riviera (1988-1990), Buick Skylark (1978-1979), or Jeep Jeepster (1966-1967), these bearings are designed to fit those specific engine applications.

The ACL 4M1690P-30 set is built to handle the demands of engine operation. The 0.040 inch overflange length is an important specification, meaning these are intended for crankshafts that have been machined to this specific size. Using the correct size bearings is essential for maintaining proper oil clearance, which is key to reducing friction and wear, and ensuring the longevity of your engine.

When installing these bearings, it's important to ensure your crankshaft journals have been properly measured and machined to the +0.040" over specification. Always refer to your vehicle's service manual for the correct installation procedures and torque specifications to ensure a successful engine rebuild.