ACL main bearing set — manufacturer catalog product photo
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
Click to zoom in

ACL Subaru EJ20/EJ22/EJ25 (For Thrust in #5 Position) 0.50mm Undersize-Journal High Performance Main Bearing

$ 172.32
$ 172.32

ACL 5M8309H-.50 is a main bearing set for the cataloged Subaru EJ18E, EJ205, EJ20D, EJ20E engine configurations. .50 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.

Bearing Configuration

H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.

For the cataloged Subaru configuration with the thrust bearing in position five. Verify the block and thrust arrangement before ordering.

Engine Application

Manufacturer / Engine Subaru — EJ18E
Manufacturer / Engine Subaru — EJ205
Manufacturer / Engine Subaru — EJ20D
Manufacturer / Engine Subaru — EJ20E
Manufacturer / Engine Subaru — EJ20G
Manufacturer / Engine Subaru — EJ20T
Manufacturer / Engine Subaru — EJ20TT
Manufacturer / Engine Subaru — EJ22E
Manufacturer / Engine Subaru — EJ22EZ
Manufacturer / Engine Subaru — EJ22G
Manufacturer / Engine Subaru — EJ22T
Manufacturer / Engine Subaru — EJ251
Manufacturer / Engine Subaru — EJ25D
Manufacturer / Engine Subaru — EJ25T

The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.

Specifications

Brand ACL
Manufacturer Part Number 5M8309H-.50
Component Main Bearing Set
Size Selection .50 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
Catalog Family ACL Race Series
Half Type Identical halves
Catalog Size Options STD, .025, .25, .50

Quantity and Assembly Checks

Confirm the set contents, bearing positions and any separate thrust components against the complete manufacturer number. The photo is representative of the part family.

Measure shaft journals, housing bores and assembled oil clearance using the engine builder’s specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.

Frequently Asked Questions

Is the year and model enough to choose this bearing? No. Match 5M8309H-.50 to the exact engine and measured build specification.

What size is this listing? .50 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.

Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.

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