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Audi A5 1.8tfsi CDH engine

Audi A5 1.8tfsi CDH engine

R39,500.00

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The Audi CDH (specifically the CDHA and CDHB variants) is a 1.8-litre, 16-valve turbocharged inline-four petrol engine. It is part of the EA888 Gen 2 family and was designed to replace the older EA113 engines, offering a more modern architecture focused on efficiency and mid-range torque.
Key Specifications
The CDH engine is most commonly found in the Audi A4 (B8) and is characterized by its use of a chain-driven timing system instead of a belt.
Feature Specification
Displacement 1,798 cc (1.8L)
Configuration Inline-4, DOHC, 16-Valve
Power (CDHA) 120 hp (88 kW) @ 4,000–6,200 rpm
Power (CDHB) 160 hp (118 kW) @ 4,500–6,200 rpm
Max Torque 250 Nm @ 1,500–4,500 rpm
Fuel System TFSI Direct Injection
Aspiration Turbocharged (BorgWarner K03) with Intercooler
Timing Timing Chain
Vehicle Applications
The CDH series was primarily used for longitudinal engine layouts in premium Audi models between 2008 and 2012.
  • Audi A4 (B8): The most common application for both 120 hp and 160 hp versions.
  • Audi A5 (8T): Used in early Sportback and Coupe 1.8 TFSI models.
  • Audi A3 (8P) and Audi TT (8J): Shared this engine platform in certain markets.
  • SEAT Exeo: Utilised this engine as a rebadged version of the A4 B7/B8 chassis.
Reliability and Known Issues
As an EA888 Gen 2 unit, the CDH engine is notorious for several high-cost maintenance issues that surfaced as the engines aged.
  • Excessive Oil Consumption: This is the most significant flaw, caused by poorly designed piston rings and pistons. Many units require an engine rebuild to replace these components and stop the oil burning.
  • Timing Chain Tensioner Failure: The original tensioner design was prone to failure, which could cause the chain to skip and lead to catastrophic engine damage. Owners often upgrade to the revised “Gen 3” tensioner for safety.
  • Carbon Buildup: Like all direct-injection engines, carbon deposits accumulate on the intake valves, eventually causing rough idling and power loss.
  • Water Pump Failure: The plastic housing on the water pump is known to crack or leak prematurely.