Audi A4: EA113 2.0 TFSI Hydraulic Timing Chain Tensioner Failure

The EA113 2.0 TFSI engine uses a hydraulically actuated timing chain tensioner that depends on adequate oil pressure to maintain chain tension. On cold starts or when oil pressure drops due to low oil level or a worn oil pump, the tensioner loses pressure and allows the chain to rattle and, in severe cases, jump a tooth or more on the camshaft sprocket. A jumped chain causes immediate and typically catastrophic valve-to-piston contact, bending valves and scoring pistons. This failure mode is well-documented in B7 A4 production years and early B8 variants sharing the EA113 block. It is worsened by extended oil change intervals and any oil consumption that goes uncorrected.

• Metallic rattling or chattering from the front of the engine on cold start that may subside as oil pressure builds
• Check engine light with camshaft position correlation codes P0016 or P0017
• Rough running, misfires, or sudden loss of power if the chain has already jumped timing
• Catastrophic engine failure (bent valves, piston damage) in advanced cases where the chain has skipped multiple teeth

1. 1

   Start the cold engine and listen immediately for a metallic rattling or ticking from the front of the engine that fades within 5-10 seconds as oil pressure builds.

2. 2

   Check oil level and condition — low or dark sludged oil greatly increases risk.

3. 3

   Request any history of timing work.

4. 4

   Pull any stored fault codes for camshaft correlation (P0016, P0017, P0341, P0346).

Parts involved: Timing chain.

$2,200 to $7,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the timing chain, tensioner, and guides ever been replaced? At what mileage?”
• “How often has the oil been changed, and has the car ever shown low oil warnings?”
• “Has the car ever had a check engine light related to camshaft timing or misfires?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.