Overview — Cylinder Head 4012802DC
4012802DC is the cylinder head casting used on CUMMINS QSW-series engines, carrying the valves, injectors and combustion chambers for the cylinder bank. We can supply this part as well as related CUMMINS engine components, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The head is a cast iron assembly with machined combustion chambers, valve seats, ports and cooling passages that match the original CUMMINS specification. Valve guide bores, injector bores and head-bolt holes are machined to the factory tolerances so the head bolts down without interference and seals correctly against the block. The deck face is flat within the original limit, which is essential for a reliable head gasket joint, and the casting carries the necessary oil and coolant galleries in the original positions. As a replacement core, the head is intended for rebuild with the specified valve and injector components from the same service program.
Applicable Models & Applications
This cylinder head is used on CUMMINS QSW engine models fitted in industrial, marine, generator and construction applications. The QSW family operates across a range of ratings, and the head is common to the builds that use the same combustion and cooling layout. Applications include overhaul and rebuild work where the original head has cracked, warped or worn beyond the service limit, as well as exchange programs where a serviceable core is remanufactured. Confirm the engine serial range and the valve and injector configuration against the original head before ordering.
Maintenance & Replacement
Cylinder head damage is usually found during an overhaul triggered by coolant loss, compression complaints or a failed head gasket. Before fitting a replacement head, check the block deck for flatness and damage, and verify the head gasket surface is clean and free of old gasket material. Fit the head with new head bolts or studs as specified, apply the correct lubrication to the threads, and tighten in the sequence and torque steps given in the service manual. After assembly, perform the valve clearance and injector settings, and pressure-test the cooling system before the engine is loaded. A correct rebuild restores compression and cooling performance for a full service interval.
Price Reference (USD)
The reference price for this Cylinder Head (4012802DC) is approximately USD 400 – 1200 per unit depending on condition grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Value & Service
Heads are the most critical and expensive casting in an overhaul, so we verify 4012802DC against the original CUMMINS part number and check the deck, valve and injector bore condition before it is dispatched. Because head failures often surface only after the engine is reassembled, we support our supply with clear quality checks and responsive after-sales help, and our team can confirm the correct valve and gasket set for your QSW engine serial range. Worldwide shipping with tracking is available, and quantity pricing is offered to rebuild shops.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and engine model, and we will confirm fitment, price and lead time for this cylinder head and related CUMMINS QSW overhaul components.
