6BD1 / 6BG1 Complete Cylinder Head — Isuzu Forklift OEM 1-11110-601-1 / 1111109060

This complete cylinder head assembly (OEM part numbers 1-11110-601-1 and 1111109060) is manufactured for the legendary Isuzu 6BD1 and 6BG1 6-cylinder diesel engines, the heavy-hitting powerplants behind 5-16 ton forklifts, medium-duty trucks, excavators, and generator sets worldwide. The Isuzu 6BD1/6BG1 family is revered for its bulletproof reliability in the most demanding industrial applications — and the cylinder head is the single most critical component in the entire engine. It seals six combustion chambers, houses 12 valves and the complete valve train, directs intake and exhaust flow through precision-engineered ports, integrates the injector and glow plug mounting points, and manages thermal loads that can exceed 400°C in the exhaust port region. A failed 6BD1/6BG1 head — typically from cracking between valve seats, warpage from overheating, or valve seat recession — cannot be economically repaired and demands complete replacement with a quality aftermarket assembly.

Cast from premium-grade alloy gray iron using precision sand-casting techniques, this cylinder head replicates every critical dimension and passage of the original Isuzu component. The deck face is CNC-ground to less than 0.03mm flatness across the full 800mm+ length, guaranteeing a perfect MLS gasket seal across all six cylinders — a non-negotiable requirement for these long-head engines that are particularly susceptible to gasket failure between cylinders 3-4 if flatness is out of tolerance. All 12 valve seats are precision-cut with three-angle profiles optimized for flow and heat transfer, and pre-installed valve guides are reamed to Isuzu specifications. Injector sleeves, glow plug bores, and all threaded holes are machined to factory tolerances. Each head undergoes mandatory hydraulic pressure testing of coolant jackets and oil galleries, followed by a final dimensional inspection before packaging.

Direct replacement for Isuzu 6BD1 and 6BG1 engines in 5-16 ton forklifts (including Isuzu, Komatsu, TCM, and Kalmar heavy-duty models), Isuzu FSR/FTR medium-duty trucks, Hitachi and Sumitomo excavators, and stationary generator sets. Always install with a new MLS head gasket, new torque-to-yield head bolts, and new manifold gaskets. The 6BG1 head bolt torque procedure involves multiple stages with angle-tightening — follow the Isuzu workshop manual exactly. For related engine components, browse our engine parts collection. Reference OEM specifications at Isuzu Industrial Engines official page.

Technical Specifications

• SKU: 1-11110-601-1
• OEM Numbers: 1-11110-601-1 / 1111109060
• Type: Complete Cylinder Head Assembly (6-Cylinder)
• Material: Premium Alloy Cast Iron, CNC Machined, Pressure Tested
• Fitment: Isuzu 6BD1 / 6BG1 6-Cylinder Diesel Engine
• Application: 5-16 Ton Forklifts, Medium Trucks, Excavators, Generators

Compatible Equipment & Vehicles

Kingstream 6BD1/6BG1 cylinder heads are individually pressure-tested, oil-misted on machined surfaces, vacuum-sealed in VCI barrier film, and packed in high-density foam within a reinforced heavy-duty export carton. QC documentation included. 12-month warranty against casting and machining defects. Contact us for freight quotes, bulk pricing, or technical fitment verification with your engine serial number.