Toyota 15B Cylinder Head Complete Guide: Structure, Fitment & Buying Tips
The Toyota 15B 4.1L diesel engine serves global commercial vehicles including Coaster buses, Dyna medium trucks and Mega Cruiser heavy off-road. High-mileage units often face cylinder head cracking, water leakage and deck warping. Many buyers mix up 15B-F, 15B-FT and 15B-FTE heads, causing extra repair costs. This guide covers structural differences, full vehicle fitment and professional purchasing advice to pick a long-lasting replacement head.
1. Core Structural Analysis of 15B Cylinder Head
Basic Specs
4104cc Inline 4 OHV 16-Valve Direct Injection Diesel
Material: High-density alloy cast iron
Main OEM No.: 11101-58100, 11101-58091, 11101-59102
Supply Type: Bare Head / Full Assembled Head
Design Advantages
Large curved cooling water jacket for uniform heat dissipation
Reinforced valve bridge to solve original cracking defect
Independent oil duct for stable injector & rocker lubrication
Polished intake/exhaust ports for better airflow
Three Non-Interchangeable 15B Variants
15B-F Naturally Aspirated | OE:11101-58091
Thin exhaust port, no reinforced seat ring, for light-load Dyna & low-mileage Coaster
15B-FT Turbocharged (Most Popular) | OE:11101-58100
Thickened exhaust wall, reinforced valve seat, optimized cooling, fit heavy-duty trucks & passenger buses
15B-FTE Electronic Turbo | OE:11101-59102
Extra ECU sensor holes, maximum heat resistance, exclusive for Toyota Mega Cruiser BXD20
2. Full Matching Vehicle List
Toyota Coaster Bus
- BB50, BB58, BB42 (1994-2003) | 15B-F / 15B-FT
Toyota Dyna Medium Truck
- BU212, BU222, BU340, BU410, BU112 | All 15B series
Toyota Mega Cruiser
- BXD10, BXD20 | Exclusive 15B-FTE 11101-59102 cylinder head
3. Professional Purchase Tips & Our Product Strength
Common Original Head Faults: Valve bridge cracking, deck warping, coolant leakage, oil emulsification caused by overheat
Our Cylinder Head Advantages
✅ Reinforced valve bridge casting to eliminate cracking risk
✅ 100% hydraulic pressure leak test before delivery
✅ High temp resistant alloy valve seats, longer service life
✅ 12-month global warranty, support single & bulk order (MOQ=1PC)
✅ Strictly separated F/FT/FTE models, no mixed universal inferior parts
⚠ Warning: Cheap universal unstrengthened 15B heads crack within 3-8 months, causing repeated overhaul loss.
Need Exact Part Number & Best Quotation?
Send your vehicle model, year and engine serial number, we reply within 24 hours.
Submit Inquiry NowToyota 15B cylinder head, 15B-FT cylinder head, 11101-58100 head, Coaster BB50 engine cylinder head, Dyna BU340 15B head, Mega Cruiser 15B-FTE cylinder head
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