Specifications
- Brand
- ACL
- Part #
- 4M1690P-30

ACL 4M960P + .040 O/W FLANGE Engine Crankshaft Main Bearing Set
$31.53
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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.
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.
Specifications
- Brand
- ACL
- Manufacturer Part #
- 4M1690P-30
Frequently Asked Questions
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ACL 4M960P + .040 O/W FLANGE Engine Crankshaft Main Bearing Set
