Size Chart
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ACL 5M1186H-.025 is a main bearing set for the cataloged Hyundai / Mitsubishi G4CP, 4G63, 4G64, 4G64-S4 engine configurations. .025 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.
For 4G63, 4G63T and 4G64 applications, ACL’s 2023 guide catalogs this main-bearing family for the 1992–1997 flange-main arrangement. The 1997-on separate-thrust-washer arrangement uses the 5M1219 family. Confirm the actual block and thrust design at the changeover.
| Manufacturer / Engine | Hyundai — G4CP |
|---|---|
| Manufacturer / Engine | Mitsubishi — 4G63 |
| Manufacturer / Engine | Mitsubishi — 4G64 |
| Manufacturer / Engine | Mitsubishi — 4G64-S4 |
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 | 5M1186H-.025 |
| Component | Main Bearing Set |
| Size Selection | .025 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.
Is the year and model enough to choose this bearing? No. Match 5M1186H-.025 to the exact engine and measured build specification.
What size is this listing? .025 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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