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5M1857H-STD Race Series Bearings for Toyota and Lotus 2ZZ-GE Builds
The ACL 5M1857H-STD is a main bearing set for performance-oriented Toyota 2ZZ-GE 1.8L engine builds. It is cataloged for select Toyota, Pontiac, and Lotus applications and uses ACL Race Series bearing technology. Confirm the complete part number, engine code, crankshaft dimensions, housing bores, and required assembled oil clearance before ordering.
Key Features
- Application-specific bearing geometry for the Toyota 2ZZ-GE 1.8L engine family
- H-series Race Series construction is intended for performance engine builds where dimensions and clearances are measured during assembly.
- Standard-size designation for use with correctly measured standard-size journals
- Performance bearing construction intended for properly machined and measured engine assemblies
- ACL 5M1857H-STD must be selected by exact engine and measured clearance, not vehicle name alone
Fitment
| Year | Make | Model | Engine |
|---|---|---|---|
| 2000–2005 | Toyota | Celica GTS | 2ZZ-GE 1.8L |
| 2003–2006 | Toyota | Matrix XRS | 2ZZ-GE 1.8L |
| 2003–2006 | Pontiac | Vibe GT | 2ZZ-GE 1.8L |
| 2005–2006 | Toyota | Corolla XRS | 2ZZ-GE 1.8L |
| 2005–2011 | Lotus | Elise | 2ZZ-GE 1.8L |
| 2006–2011 | Lotus | Exige | 2ZZ-GE 1.8L |
Fitment is limited to vehicles equipped with the cataloged 2ZZ-GE engine. Engine swaps, prior machining, crankshaft replacement, and production changes can alter the required bearing. Verify the engine code and all finished dimensions before installation.
Specifications
| Detail | Value |
|---|---|
| Brand | ACL |
| Manufacturer Part Number | 5M1857H-STD |
| Product Type | Main Bearings |
| Series | Race Series |
| Engine | Toyota 2ZZ-GE 1.8L inline-four |
| Size | STD manufacturer designation |
| Catalog Main Housing Bore (STD journal) | 52.000–52.016 mm |
| Catalog Main Journal Diameter (STD) | 47.988–48.000 mm |
| Clearance | H standard Race Series configuration |
| Thrust Component | Separate ACL 1T1853-STD thrust washer set may be required |
What’s Included
- One complete main bearing set for the 2ZZ-GE engine. Thrust washers are sold separately unless explicitly shown as included.
- Manufacturer packaging and identification for ACL 5M1857H-STD
About ACL
ACL produces precision engine bearings for street-performance, motorsport, and professional engine-building applications. Its Race Series range is designed to support controlled oil films and reliable load distribution when the crankshaft, rods, block, bearing shells, and oil-clearance targets are correctly measured and prepared.
Related Parts
Complete the same 2ZZ-GE bearing system with application-matched components:
Frequently Asked Questions
What is the 5M1857H-STD?
It is an ACL Race Series main bearing set for cataloged Toyota 2ZZ-GE 1.8L applications.
Is this bearing set standard size?
Yes. STD is ACL’s standard-size designation, but every journal and housing bore must still be measured before assembly.
Which vehicles use this bearing set?
Catalog applications include select Toyota Celica GTS, Matrix XRS, Corolla XRS, Pontiac Vibe GT, Lotus Elise, and Lotus Exige models equipped with the 2ZZ-GE engine.
Will it fit every vehicle in the listed year range?
No. Fitment depends on the exact 2ZZ-GE engine configuration and the engine’s current machined dimensions.
What does the H designation mean?
H identifies the standard ACL Race Series configuration for this application.
Are thrust washers included?
The catalog lists thrust washers separately; use the verified ACL thrust-washer listing when required by the build.
Can I install these without measuring oil clearance?
No. A qualified engine builder should measure the crankshaft journals, housing bores, bearing clearances, and crankshaft fillet clearance.
Are these a direct substitute for an undersize or repair-size bearing?
No. STD, undersize, and extra-clearance designations are not interchangeable. Select the bearing required by the measured finished dimensions.
Installation Instructions
- Confirm the engine code and match ACL 5M1857H-STD to the planned build specification.
- Inspect and measure the crankshaft journals and the relevant rod or block housing bores.
- Clean the bearing saddles, caps, journals, and oil passages thoroughly.
- Check shell position, locating tangs, oil-hole alignment, and crankshaft fillet clearance.
- Install the dry shell backs into clean, dry housings without mixing upper and lower positions.
- Torque fasteners in the correct sequence using the engine builder’s specifications and the fastener manufacturer’s procedure.
- Measure assembled oil clearance and crankshaft movement before final assembly. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.
- Lubricate bearing surfaces with the engine builder’s approved assembly lubricant and complete final assembly only after all measurements pass.
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