Main Bearings

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ACL Main Bearing Set for Nissan VK45, VK50, VK56, 4.5L, 5.0L, 5.6L V8, Size STD
ACL Main Bearing Set for Nissan RB26DETT, 2.6L 6-cylinder, Size 0.25
ACL Main Bearing Set for Nissan VK45, VK50, VK56, 4.5L, 5.0L, 5.6L V8, Size 0.25
ACL Main Bearing Set for Nissan RB20E, RB20S (SOHC), 2.0L 6-cylinder, Size STD HX
ACL Main Bearing Set for Nissan VK45, VK50, VK56, 4.5L, 5.0L, 5.6L V8, Size STD HX
ACL Main Bearing Set for Nissan VK45, VK50, VK56, 4.5L, 5.0L, 5.6L V8, Size 0.025
ACL Main Bearing Set for Nissan SR20DET (GTiR), 2.0L 4-cylinder, Size 0.025
ACL Main Bearing Set for Nissan SR20DET (GTiR), 2.0L 4-cylinder, Size STD HX
ACL Main Bearing Set for Nissan SR20DET (GTiR), 2.0L 4-cylinder, Size 0.25
ACL Main Bearing Set for Nissan SR20DE/DET (non GTiR), 2.0L 4-cylinder, Size 0.025
ACL Main Bearing Set for Nissan SR20DET (GTiR), 2.0L 4-cylinder, Size STD
ACL Main Bearing Set for Nissan SR20DE/DET (non GTiR), 2.0L 4-cylinder, Size STD HX
ACL Main Bearing Set for Nissan KA24DE, 2.4 4-cylinder (240SX), Size 0.25
ACL Main Bearing Set for Nissan SR20DE/DET (non GTiR), 2.0L 4-cylinder, Size 0.25
ACL Main Bearing Set for Nissan KA24DE, 2.4 4-cylinder (240SX), Size 0.025
ACL Main Bearing Set for Nissan SR20DE/DET (non GTiR), 2.0L 4-cylinder, Size 0.50
ACL Main Bearing Set for Nissan CA16, CA18, CA18DET, CA20, CD17, 1.6L/1.7L/1.8L/2.0L 4-cylinder, Size 0.025
ACL Main Bearing Set for Nissan KA24DE, 2.4 4-cylinder (240SX), Size STD HX
ACL Main Bearing Set for Nissan CA16, CA18, CA18DET, CA20, CD17, 1.6L/1.7L/1.8L/2.0L 4-cylinder, Size STD HX
ACL Main Bearing Set for Nissan CA16, CA18, CA18DET, CA20, CD17, 1.6L/1.7L/1.8L/2.0L 4-cylinder, Size 0.50
ACL Main Bearing Set for Mitsubishi 4G91/4G92/4G93/4G93-T, 1.5L/1.6L/1.8L 4-cylinder, Size STD
ACL Main Bearing Set for Nissan VQ35HR, VQ37VHR, 3.5L, 3.7L V6, Size 0.25
ACL Main Bearing Set for Mitsubishi 4G91/4G92/4G93/4G93-T, 1.5L/1.6L/1.8L 4-cylinder, Size 0.25
ACL Main Bearing Set for Nissan CA16, CA18, CA18DET, CA20, CD17, 1.6L/1.7L/1.8L/2.0L 4-cylinder, Size 0.25
ACL Main Bearing Set for Mitsubishi 4B11T (EVO X) Lancer Evolution, 2.0L 4-cylinder, Size STD HX
ACL Main Bearing Set for Mitsubishi 4B11T (EVO X) Lancer Evolution, 2.0L 4-cylinder, Size 0.25
ACL Main Bearing Set for Mitsubishi 4B11T (EVO X) Lancer Evolution, 2.0L 4-cylinder, Size 0.025
ACL Main Bearing Set for Mitsubishi 4G63/4G63T/4G64 (1997 on, with thrust washers), Size 0.25
ACL Main Bearing Set for Mitsubishi 4G63/4G63T/4G64 (1997 on, with thrust washers), Size 0.025
ACL Main Bearing Set for Mitsubishi 4G63/4G63T/4G64 (1992-97), Size 0.25
ACL Main Bearing Set for Mitsubishi 6G72, 6G72T, 6G73, 3.0L/2.5L V6, Size STD HX
ACL Main Bearing Set for Mitsubishi 6G72, 6G72T, 6G73, 3.0L/2.5L V6, Size STD
ACL Main Bearing Set for Lancia Delta HF Integrale, 1995 cc 4-cylinder turbo, Size STD HX
ACL Main Bearing Set for Mitsubishi 4G63/4G63T/4G64 (1992-97), Size 0.025
ACL Main Bearing Set for Mitsubishi 6G72, 6G72T, 6G73, 3.0L/2.5L V6, Size 0.25
ACL Main Bearing Set for Lancia Delta HF Integrale, 1995 cc 4-cylinder turbo, Size 0.25

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Buying guide and details

Main bearings hold the crankshaft in the engine block, on an oil film. The set is chosen by engine code and by journal size: STD for a factory crankshaft, 0.25 or 0.50 after regrinding.

How to read the size

  • STD: journals at the factory size.
  • STD HX: journals at the factory size, with 0.025 mm more oil clearance than the STD set. It is not an upgrade: the clearance is set by the journal and the bore.
  • 0.025, 0.25, 0.50: journals ground that much under the factory size.

Before you order

  • Choose the size from the journal measurement made by the shop that machined the crankshaft.
  • ACL sets are sold sealed by the manufacturer: check the part number and the size before you open the set.
  • The rod bearings for the same engine are in rod bearings. Crankshaft thrust washers are here too.