Perkins GT25-1W Turbocharger 2674A404 – 4.40L for Delivery Truck

Overview

Our premium aftermarket Perkins 4.40L turbocharger is engineered to resolve power drop, boost leakage, and oil weeping issues in high-utilization delivery truck turbo replacement jobs and municipal service truck turbo systems. Built in strict alignment with Perkins’ legendary engineering standards—trusted worldwide as the heart of every great machine for off-highway and commercial vehicle turbo applications—our valvetrain-driven assemblies restore original throttle response. This replacement GT25-1W (interchangeable with GT25 series) turbo is optimized for 4.40L diesel engine builds, directly replacing the OEM Perkins turbo 2674A404 and Garrett 738233-0002 cross reference. Whether you are overhauling post-2003 box trucks, servicing urban distribution vans, or maintaining specialized chassis vehicles, our assembly secures factory-spec manifold boost.

Continuous operation of commercial vehicles under constant stop-and-go city loads accelerates journal bearing wear and oil contamination. If the crankcase breather is blocked or restricted, high crankcase pressure prevents proper oil drain-back from the turbo housing, forcing oil past the dynamic piston seals and triggering excessive blue smoke, high oil consumption, and turbine wheel erosion. To eliminate these common commercial failures, our Perkins truck spares catalog features premium heavy-duty metallurgy. Cast with a high-nickel K18 Inconel turbine wheel (resisting thermal fatigue up to 750°C) and dynamically balanced on high-speed VSR machines up to 150,000 RPM, our 2674A404 (also compatible with 768233-5002 and 433289-5220S) assembly prevents internal leak-back. Technical Tip: Before installing the new unit, always inspect the crankcase breather and oil feed pipe for restriction.

Technical Specifications

Available Models

Our manufacturing facilities support a complete range of low-wear Perkins turbine assemblies. Check our Perkins turbocharger options for additional industrial and agricultural engine turbo choices to restore system intake pressures.

Equipment Compatibility

This 2674A404 GT25-1W turbocharger is a direct-fit component calibrated for various commercial transit, municipal delivery, and medium-duty box trucks:

Why Partner with Ruich Value

As a premier industrial diesel turbo manufacturer and direct alternative to a regional UK Perkins parts supplier, we provide micro-balanced turbocharging systems designed to maximize field uptime:

• Premium K18 Inconel Alloy Turbine Wheels: Our exhaust turbine wheels are cast from high-nickel K18 Inconel alloy, ensuring exceptional structural integrity and creep resistance under sustained gas temperatures up to 750°C.
• VSR Core Balancing up to 150,000 RPM: Every turbo cartridge kit (CHRA) undergoes dynamic Vibration Sorting Rig (VSR) testing at operational speeds to eliminate oil leakage and ensure quiet, whisper-smooth bearing rotation.
• Pre-Calibrated Wastegate Actuators: Pneumatic actuators are individually calibrated on electronic flow benches to precisely match original engine torque and boost curves, eliminating turbo lag.
• 100% Helium Leak and Oil Pressure Testing: To avoid micro-porosity in the turbine housings, all units are helium leak checked and hot oil pressure run before final cleanroom packaging.

Get a Quick Quote

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For Turbocharger: Spare parts available – CHRA, actuator, repair kits. Part number required for final confirmation. OEM and aftermarket options.