Description
As an original equipment mainstay from Schaeffler Group, the INA Auto Engine Camshaft Shaft Assembly is designed to restore and enhance the precise rotational synchronization of modern automotive valve control systems. Serving as the master timing component within the cylinder head, this camshaft assembly precisely governs the opening depth and duration of intake and exhaust valves. To combat the severe dynamic flex, surface friction, and contact fatigue caused by modern high-RPM engines, INA utilizes advanced assembled-camshaft technology combined with high-grade micro-alloy steel construction. Each lobe profile is engineered with computer-guided contours to optimize airflow dynamics, boost engine torque delivery, and reduce fuel consumption. Ideal for resolving valve tap, cylinder power loss, and premature lobe wiping, this OE-spec assembly is an essential component for professional machine shops, engine rebuilding facilities, and auto parts distributors worldwide.
Technical Parameters
| Category | Specifications & Technical Details |
| Assembled Hollow-Tube Construction & Low Rotational Inertia | INA utilizes a modular built-up manufacturing process, shrink-fitting high-precision hardened cam lobes and drive gears onto high-strength seamless steel tube. Compared to traditional cast solid shafts, the hollow tube design reduces component weight by 30%–45%, significantly lowering camshaft rotational inertia and making valvetrain power response more agile during hard acceleration. |
| Induction-Hardened Lobe Surfaces & Precision Lift Profiles | Cam lobe working surfaces undergo induction hardening and heat treatment, achieving surface hardness of 58–62 HRC. Lobe lift curve manufacturing tolerances are controlled at micron level, enabling precise control of valve overlap angle and lift. Effectively resists surface pitting and spalling caused by high-frequency friction with rocker arms / lifters. |
| Ra ≤ 0.1 μm Super-Finished Journal Polish | All support journals undergo super-finishing, achieving surface roughness of Ra ≤ 0.1 μm, combined with extremely high cylindricity tolerances. This structure ensures the journals instantly establish a stable hydrodynamic oil film under lubricating oil pressure, preventing direct metal-to-metal dry friction and greatly reducing bearing seat scoring risk. |
| Integrated Camshaft Position Target Wheel & VVT Interface | The shaft end is pre-fitted with a high-precision phase sensor target wheel and VVT (variable valve timing) actuator locating holes. The phase angle tolerance of the signal teeth is extremely strict, ensuring continuous accurate position signal output to the engine control unit (ECU) and guaranteeing seamless response of the variable timing mechanism. |
| High Torsional Rigidity & Bending Fatigue Resistance | Manufactured from high-purity alloy steel, processed with internal stress relief treatment. The camshaft possesses extremely strong torsional and bending resistance, capable of withstanding continuous alternating reaction forces generated by valve springs at high RPM, without deformation or fracture during long-term operation under extreme conditions. |
Applicable Car Brands & Models
Typical failure indicators include:
Ticking or Clack Noise from Cylinder Head: Metallic tapping noises originating from beneath the valve cover, caused by excessive clearance from worn cam lobes.
Engine Misfires & Loss of Acceleration: P0300-P0304 fault codes and reduced engine pull due to improper valve lift and restricted breathing.
Camshaft Position Sensor Error Codes: Trouble codes such as P0011, P0014, or P0340 triggered by incorrect valve timing or sensor target wheel misalignment.
Metal Debris in Engine Oil: Flakes or fine metallic dust detected in the oil pan/filter due to severe friction scoring on the lobes.
Yes. Replacing hydraulic lifters, bucket tappets, or roller rocker arms alongside a new camshaft is highly recommended. Reusing worn components with grooved or uneven contact surfaces will rapidly wear down the polished lobes of the new camshaft, leading to premature failure and repeated repair costs.
Prior to starting the engine, a specialized high-zinc engine assembly lube must be generously coated over all camshaft lobes and journal bearings. Furthermore, the oiling system should be hand-primed or cranked with ignition disabled to ensure instant oil pressure reaches the head before the engine fires up.
Each INA Auto Engine Camshaft Shaft Assembly is treated with rust-inhibiting VCI oil, vacuum-sealed in a heavy-duty plastic sleeve, and fitted into a reinforced Schaeffler INA branded box with foam end-cap supports. B2B minimum order quantities typically start at 5 to 10 units per part number, with flexible shipping arrangements for consolidated distributor orders.
