Diagnosing and Fixing Oil Leaks from the 2013-2021 Audi 1.8T & 2.0T Engine Timing Cover

Understanding the Timing Covers on the Audi EA888 Engine

If you own a 2015-2020 Audi A3, 2013-2020 Audi A4, 2013-2020 Audi A5, 2014-2021 Audi A6, 2013-2020 Audi Allroad, 2015-2018 Audi Q3, 2013-2020 Audi Q5, 2017-2020 Audi Q7, 2015-2020 Audi S3, or a 2014-2020 Audi TT with the 1.8L or 2.0L TSI/TFSI engine, you have what is known as the EA888 Generation 3 engine. A very common issue on these engines is an oil leak from the front, which is almost always traced back to the timing covers.

There are two separate covers that can leak:

• Upper Timing Cover: This is a black plastic cover on the top front of the engine. It is the most frequent source of oil leaks on these engines. Over time, the gaskets that seal the cover to the cylinder head and the two round gaskets for the camshaft adjuster magnets become hard and brittle, allowing oil to seep out.
• Lower Timing Cover: This is a larger, cast aluminum cover located below the upper cover. While less common to fail than the upper cover, its sealant can also degrade over time, causing leaks further down the front of the engine. This cover also houses the front crankshaft seal.

Symptoms of a Failing Timing Cover

The signs of a timing cover leak are usually straightforward. Look for the following:

• Visible Oil Leaks: This is the most common symptom. You will see fresh oil or accumulated grime on the front of the engine. Leaks from the upper cover often start around the top passenger side, running down the front of the engine. 🎬 See this guide to diagnosing common oil leak spots. You may also find oil dripping onto the ground or on the plastic belly pan under the engine.
• Burning Oil Smell: As oil leaks down the hot engine block or onto exhaust components, it will burn off, creating a distinct and unpleasant smell, especially when the engine is warm.
• Low Engine Oil Light: A persistent leak will cause the engine oil level to drop over time, eventually triggering the low oil warning light on your dashboard.

Known Issues, TSBs, and Recalls

While there isn't a specific recall for timing cover leaks on most of these models, the problem is widely documented in repair forums and by mechanics as a common failure.

It is worth noting that Audi/VW issued recall 15ZK for some 2022-2024 Audi Q5 and Q5 Sportback models due to improperly tightened cylinder head cover screws that could loosen and cause an oil leak, increasing fire risk. While this recall applies to a later model year and a different cover (the valve cover, not the timing cover), it highlights the brand's attention to oil leaks in this engine area.

Buying a Used Engine Timing Cover: What to Check

For a part like this, a quality used OEM component can be a smart buy, especially for the more expensive lower aluminum cover. Aftermarket quality can be inconsistent, and a genuine used part guarantees correct fitment. Here’s what to inspect:

• Check for Cracks and Damage: This is the most important check. For both the upper plastic cover and the lower aluminum one, carefully inspect all surfaces, especially around the bolt holes, for any hairline cracks or impact damage.
• Inspect Sealing Surfaces: Run your finger along all the flat surfaces where the gaskets or sealant will go. They must be perfectly smooth and free of deep scratches, corrosion, or warping. Any imperfection can cause a new leak.
• Verify Part Numbers: The lower timing cover has gone through several revisions. The latest version is part number 06K109210AF. It supersedes older versions like 06K109210 and 06K109210AE. Always aim for the newest revision if possible.
• Condition of Front Crank Seal Area (Lower Cover): On the lower cover, inspect the circular opening for the front crankshaft seal. Ensure it is not scored or damaged.
• Forget the Old Gaskets: Never reuse old gaskets or seals. Any used timing cover you buy will need a new set of gaskets or fresh sealant applied during installation. The cost of new seals is minimal compared to the labor of fixing a leak.

Replacement Cost Breakdown

The cost to fix a timing cover leak depends heavily on whether it's the upper or lower cover and your location. The upper cover is significantly easier and cheaper to service.

Note: Labor costs vary based on engine orientation. Transverse engines (A3, Q3, TT, S3) may have tighter access and slightly higher labor costs than longitudinal engines (A4, A5, A6, Q5, Q7).

Installation Difficulty and Procedure Overview

• Upper Timing Cover Gasket Replacement: This is a 3 out of 5 difficulty job. It is feasible for a skilled DIYer. The process involves removing the oil dipstick tube, disconnecting some hoses and sensors for access, unbolting the two cam adjuster magnets, and then removing the five Torx bolts holding the cover. 🎬 Watch: Step-by-step upper timing cover gasket replacement walkthrough. The key is to thoroughly clean the old gasket material from both the engine and the cover (if reusing) and to apply a small dab of RTV sealant at the corners where the cylinder head meets the block before reinstalling.
• Lower Timing Cover Replacement: This is a more difficult job, rated 4 out of 5. It requires supporting the engine, removing the serpentine belt, and removing the crankshaft pulley/harmonic balancer, which often requires a special counter-hold tool. Due to the complexity and need for special tools, this is often best left to a professional.

Distinction for 1.4L Hybrid Models

The Audi A3 Sportback e-tron (2016-2018) uses a 1.4L plug-in hybrid engine, not the 1.8T/2.0T. This engine uses a timing belt, not a chain. The upper timing cover for this engine is part number 04E109108N. While it serves a similar protective function, it is a different part and is not interchangeable with the EA888 engine covers.

Frequently Asked Questions (FAQ)