Yimi (Guangzhou) Automotive Parts Co, Ltd
| Gasket Width | 197 mm |
| Supply Ability | 10000 pcs/month |
| Gasket Length | 503 mm |
| Compressed Thickness | 1.3 mm |
| Delivery Time | 5-8 Work Days |
| Engine Compatibility | Toyota 15B, 15B-F, 15B-FT, 15B-FTE (4.1L / 4,104 cc inline-4 diesel) |
| OEM Part Number | 11115-58140 |
| Bore Diameter | 108.0 mm |
| Gasket Type | Multi-Layer Steel (MLS) |
| Packaging Details | Neutral Package or as customers’ request |
| Gasket Diameter | 109.5 mm |
| Payment Terms | T/T,Western Union |
| Certification | ISO/TS16949 |
| Model Number | Toyota 15B 4.1L Diesel Dyna Coaster |
| Brand Name | YIMI |
| Place of Origin | China |
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Product Specification
| Gasket Width | 197 mm | Supply Ability | 10000 pcs/month |
| Gasket Length | 503 mm | Compressed Thickness | 1.3 mm |
| Delivery Time | 5-8 Work Days | Engine Compatibility | Toyota 15B, 15B-F, 15B-FT, 15B-FTE (4.1L / 4,104 cc inline-4 diesel) |
| OEM Part Number | 11115-58140 | Bore Diameter | 108.0 mm |
| Gasket Type | Multi-Layer Steel (MLS) | Packaging Details | Neutral Package or as customers’ request |
| Gasket Diameter | 109.5 mm | Payment Terms | T/T,Western Union |
| Certification | ISO/TS16949 | Model Number | Toyota 15B 4.1L Diesel Dyna Coaster |
| Brand Name | YIMI | Place of Origin | China |
| High Light | 1.3mm MLS cylinder head gasket ，Toyota 15B diesel engine gasket ，4.1L multi-layer steel head gasket | ||
The cylinder head gasket carrying Toyota OEM number 11115-58140 (also 1111558140) seals the critical interface between the cylinder head and engine block on Toyota's high-durability 15B series 4.1L inline-four diesel engine. This is the 1.3mm thickness grade in Toyota's multi-thickness system for the 15B engine family, required when piston protrusion measurements call for this medium thickness.
The Toyota 15B diesel engine uses three different head gasket thickness grades depending on piston protrusion measurement - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC). The correct thickness is determined by the highest protrusion measurement across all four cylinders.
| OE Number | Thickness | Notes |
|---|---|---|
| 11115-58130 | 1.20 mm | Thinnest - for lowest piston protrusion |
| 11115-58140 | 1.30 mm | Medium thickness - this product |
| 11115-58150 | 1.40 mm | Thickest - for highest piston protrusion |
Additionally, Toyota also offers the 1.3 mm grade with the suffix "-41" as 11115-58141, which is interchangeable and cross-referenced with this gasket.
This Toyota 15B cylinder head gasket 11115-58140 directly replaces the factory sealing component in the following configurations:
| Chassis | Model | Years | Engine Variant |
|---|---|---|---|
| B40 / B50 | Toyota Coaster | 1995-2006 | 15B-FT (4.1 TD) |
| Chassis | Model | Years | Engine Variant |
|---|---|---|---|
| BU212, BU102, BU112, BU142, BU222 | Toyota Dyna 200 (Platform/Chassis) | 1995-2003 | 15B-F / 15B-FT |
| BU62-BU96 (various) | Toyota Dyna / ToyoAce | 1995-2005 | 15B-FTE |
| Chassis | Model | Years | Engine Variant |
|---|---|---|---|
| BXD20 | Toyota Mega Cruiser (4WD) | 1999-2001 | 15B-FT |
Additional vehicle configurations: Forklift, excavator, and industrial equipment applications powered by the 15B engine.
| QC Item | Verification Method |
|---|---|
| Fire ring bore alignment | Laser measurement - 109.5 mm ±0.05 mm tolerance |
| Gasket thickness (compressed) | Digital micrometer - verified against 1.30 mm ±0.02 mm specification |
| Layer registration | Optical inspection - all MLS layers align within 0.2 mm |
| Fire ring material | Spectrographic analysis - stainless steel grade confirmed |
| Elastomer coating integrity | Visual and adhesion test - no voids, cracks, or missing coating |
| Full dimensional inspection | CMM measurement - verified against 15B OE blueprint |
| Anti-corrosion treatment | VCI (Vapor Corrosion Inhibitor) sealed bag |
Why thickness selection matters: The 15B is a high-compression diesel engine (17.8-18.4:1). The correct head gasket thickness is determined by piston protrusion - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC).
| Symptom | Diagnosis |
|---|---|
| Gradual coolant loss with no visible external leak | Coolant escaping past fire ring into combustion chamber |
| White or grey steam from exhaust that continues after engine is warm | Coolant burning in combustion chamber - head gasket breach |
| Bubbles in coolant overflow bottle with engine running | Combustion gases entering cooling system |
| Pressure in cooling system - hoses remain hard even when cold | Combustion gases pressurising cooling system |
| Milky oil residue under filler cap or on dipstick | Coolant mixed with engine oil - internal gasket failure |
| Engine overheating without clear cause | Combustion gases interfering with coolant flow |
| Service Item | Interval |
|---|---|
| Replace engine coolant | Every 4-5 years or 80,000-100,000 km |
| Check for coolant loss and pressurised hoses | Monthly |
| Address any overheating event | Immediately |
| Inspect valve clearances | Every 50,000 km |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
2005
Total Annual:
8000000-10000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Yimi(Guangzhou) Automotive Parts Co,Ltd located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv... Yimi(Guangzhou) Automotive Parts Co,Ltd located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv...
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