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Description
KING Main Bearing Set Unflanged | Toyota Corolla 4A 7A | MB5527AMVehicle Fitment & Part Details The KING MB5527AM is an unflanged main bearing set engineered for Toyota 4A series and 7A FE engines, with additional fitment for the Geely MR479QA. Main bearings form the load surface between each crankshaft main journal and the engine block, maintaining oil clearance and supporting the rotating crankshaft assembly. Key Details Detail Value Brand KING Part Number MB5527AM Component Main Bearing Set, Unflanged Oil Groove
Vehicle Fitment & Part Details
The KING MB5527AM is an unflanged main bearing set engineered for Toyota 4A-series and 7A-FE engines, with additional fitment for the Geely MR479QA. Main bearings form the load surface between each crankshaft main journal and the engine block, maintaining oil clearance and supporting the rotating crankshaft assembly.
Key Details
| Detail | Value |
|---|---|
| Brand | KING |
| Part Number | MB5527AM |
| Component | Main Bearing Set, Unflanged |
| Oil Groove | Grooved upper shells only |
| Lug Configuration | 5 left lug + 5 right lug |
| Sold Configuration | Customer specifies oversize at order (STD / 0.25 / 0.50 / 0.75 / 1.00 / 1.50) |
Specifications
| Dimension | Value |
|---|---|
| Housing Size (Max) | 52.045 mm |
| Housing Size (Min) | 52.019 mm |
| Shaft Size (Max) | 48.001 mm |
| Shaft Size (Min) | 47.981 mm |
| Thickness | 2.004 mm |
| Width | 19.860 mm |
| Available Sizes | STD, 0.25, 0.50, 0.75, 1.00, 1.50 |
Vehicle Fitment
View Full Vehicle Fitment (13 applications)
| Make | Model | Engine | kW | Years |
|---|---|---|---|---|
| Geely | CK1 1.5i | MR479QA | Not specified | 2007-2009 |
| Toyota | Conquest 1600 | 4A-L | 81 | 1985-1988 |
| Toyota | Conquest 1600 LS | 4A-F | 81 | 1988-1993 |
| Toyota | Conquest 1600 RS | 4A-GE | 81 | 1986-1988 |
| Toyota | Conquest 180i | 7A-FE | 81 | 1993-1996 |
| Toyota | Corolla 1600 | 4A-GE | 81 | 1986-1988 |
| Toyota | Corolla Avante G | 4A-L | 81 | 1986-1988 |
| Toyota | Corolla 1.6 GL G | 4A-F | 81 | 1988-1993 |
| Toyota | Corolla 160i | 4A-FE | 81 | 1994-1997 |
| Toyota | Corolla 180i | 7A-FE | 81 | 1993-1996 |
| Toyota | Corolla 180i GLE | 7A-FE | 81 | 1996-2002 |
| Toyota | Corolla 1.6 RSi | 4A-GE | 81 | 1997-2002 |
| Toyota | Tazz 160i | 4A-FE | 81 | 2001-2003 |
Fitment Notes
- Customer must specify the required oversize at the time of ordering. Available sizes: STD, 0.25, 0.50, 0.75, 1.00, 1.50.
- This is an unflanged main bearing set. Crankshaft thrust is controlled by separate thrust washers, which are not included.
- Upper (block-side) shells are grooved; lower (cap-side) shells are plain.
- Power figures reflect the catalogue feed and may vary by market specification. Verify against your vehicle before ordering.
Engine Internal Component Notice
Main bearings are critical engine internal components. Correct selection of size, verification of crankshaft journal condition and oil clearance, and proper installation are essential for engine reliability. These bearings should only be fitted by a qualified engine builder or motor mechanic. Always inspect the crankshaft main journals, verify clearances with plastigauge, and follow the engine manufacturer's torque specification for the main cap bolts.
Installation & Maintenance Tips
- Measure the crankshaft main journal diameter before ordering to confirm whether STD or an oversize is required.
- Ensure the correct shells are fitted in the correct positions: grooved shells in the block, plain shells in the main caps.
- Use plastigauge or equivalent to verify oil clearance before final assembly.
- Lubricate bearing surfaces with assembly oil prior to installation.
- Order matching thrust washers separately, as this set is unflanged.
- Torque main cap bolts to the engine manufacturer's specification using the correct sequence.
Common Questions
How do I know which oversize to order?
The oversize required depends on the condition of your crankshaft main journals. After regrinding, your engine builder or machinist will measure the journals and spec
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy