Aluminum Alloy Aftermarket Cylinder Head Assembly Zz80268 Water Cooled

Part No. ZZ80268 cylinder head is a replacement assembly for the valve and combustion system of diesel engines, made for engine overhaul of construction machinery. It has five core features:

1. Integrated base for valve assembly. It reserves standard mounting positions for valve springs and collets. It can be supplied as bare head or pre-fitted with full valve sets. Repair shops can choose stock forms based on their overhaul workflow, which fits different workshop assembly habits.
2. Reinforced thickened injector pedestal. The injector mounting zone is structurally strengthened to withstand continuous fuel injection impact. It prevents seat surface sagging and fuel leakage, avoiding severe issues such as fuel mixing into cooling water and diluted engine oil.
3. Hierarchical cooling gallery arrangement. The water passages include main flow channels and auxiliary cooling branches. High-temperature zones around injectors and combustion chambers get priority heat dissipation. Gentle temperature gradient reduces thermal deformation and stress, extending the service life of the head.
4. Heat-resistant treatment on exhaust ports. The inner surface of exhaust runners is treated against high-temperature oxidation and erosion. It resists hard carbon buildup and surface peeling under long exhaust scouring, keeping low backpressure and stable engine power output.
5. Dual pressure and air tightness test. Every unit undergoes hydrostatic pressure testing plus air leakage inspection. Sealing of water galleries, oil galleries and combustion chambers is fully verified. Hidden sand holes and seepage defects are screened out, so rework after installation can be greatly reduced.

This aftermarket cylinder head has wide compatibility for loaders, excavators and other site equipment. When matched with overhaul gaskets and related kits, it maintains reliable sealing and power performance under variable field working conditions.