Size Chart
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ACL 5M1237H-.25 is a main bearing set for the cataloged Mitsubishi 4B11T engine configurations. .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.
| Manufacturer / Engine | Mitsubishi — 4B11T 2.0L — Lancer Evolution X |
|---|
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.
| Brand | ACL |
|---|---|
| Manufacturer Part Number | 5M1237H-.25 |
| Component | Main Bearing Set |
| Size Selection | .25 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 | Upper & lower |
| Catalog Size Options | STD, .025, .25 |
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.
Is the year and model enough to choose this bearing? No. Match 5M1237H-.25 to the exact engine and measured build specification.
What size is this listing? .25 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.
ACL 4B1236H-.25 rod bearings. This is a separately sold component with its own measured journal clearance; confirm the exact engine configuration and size before pairing parts.
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