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:
- Exhaust gases spin the turbine wheel
- The turbine drives the compressor wheel
- More air is forced into the engine
- 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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