Overview — Cylinder Head 3948583RX
3948583RX is the cylinder head used on CUMMINS engines at the 3944590 family specification, closing the cylinders with the original combustion chamber, valve and port geometry. We can supply this cylinder head as well as related CUMMINS cylinder head components, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The cylinder head is cast to the original material and machined to the 3944590 family specification, with the valve seats, guides, ports and deck surface finished to tolerance. The combustion chamber volume matches the original compression ratio, and the bolt holes and coolant passages align with the block. The head accepts the original valves, springs, injectors and gasket. As an OEM-spec head, it restores the original compression, breathing and cooling of the cylinder.
Applicable Models & Applications
This cylinder head is used on CUMMINS engines built to the 3944590 family bore specification, where the head design matches the cylinder block and combustion requirements. The reference 3948583RX covers the head duty on the relevant engine series. Typical applications include generator sets, industrial engines and construction equipment. Confirm the head casting number, bore family and valve configuration against the head removed from your engine before ordering.
Maintenance & Replacement
Inspect the head for cracks between valve seats, warped deck surfaces, damaged threads and worn valve guides. A cracked or warped head causes coolant loss, compression loss and overheating that cannot be cured by gasket replacement. When replacing, check the block deck for flatness, fit the new head gasket, and tighten the head bolts in the specified sequence to the specified torque. Adjust the valves to the correct clearance after installation and run the engine to verify cooling and compression.
Price Reference (USD)
The reference price for this Cylinder Head (3948583RX) is approximately USD 400 – 1,500 per unit depending on grade, core condition, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Value & Service
A cylinder head must match the block exactly, so we verify 3948583RX against the CUMMINS 3944590 family specification and confirm the casting and valve configuration before dispatch. We stock the head and can supply the complete valve train, gasket set and head bolts for a full top-end overhaul, shipped worldwide with tracking. Our team will confirm the correct head for your engine serial range.
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 top-end components.
