Turbocharger Scania 3525517

Description

Turbocharger Scania 3525517 is a heavy-duty diesel turbo designed mainly for older Scania 3-series trucks, especially the 113 model with DSC11 engines.

Basic Description

• Part number: 3525517
• Turbo model: Holset H2D
• Application: Scania 113 trucks (3-series)
• Engine type: DSC11 (≈11.0L diesel)
• Power range: ~320–360 HP engines

👉 This turbo is built for large commercial diesel engines, not passenger cars.

Key Technical Details

• Compressor wheel:
  • Inducer ~63.4 mm
  • Exducer ~93.9 mm
• Turbine wheel:
  • Inducer ~86 mm
  • Exducer ~77 mm
• Cooling: Oil-cooled bearing housing
• CHRA (core): 3525301

👉 These dimensions show it’s a medium-large turbo, optimized for torque and durability rather than extreme high RPM.

How It Works (Simple Explanation)

Like all turbochargers:

1. Exhaust gases spin the turbine wheel
2. The turbine drives the compressor wheel
3. More air is forced into the engine
4. Engine burns more fuel → more power + better efficiency

Performance Characteristics

✅ Strengths

• Designed for heavy-duty reliability
• Good low–mid RPM torque (important for trucks)
• Handles long hours under load

❌ Limitations

• Not for high-performance racing builds
• Slower spool compared to modern variable-geometry turbos
• Older design (fixed geometry)

Cross / Alternative Part Numbers

• 3525518
• 4033108 / 4033108H
• Multiple Scania OE references

Summary

The Scania 3525517 (Holset H2D) is:

• A robust, oil-cooled turbocharger
• Built for 11L Scania diesel truck engines
• Focused on torque, durability, and reliability
• Common in Scania 113 (3-series) trucks

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