Golf 6 GTI TSI Tuning Project

After we had completed our Golf 5 TFSI (Audi A3 8P) project to a large extent, we continued of course with the next engine concept:

The EA888 series is the first 4 cylinder chain engine. So VW used a chain drive instead of a timing belt for the engine control. Especially the engine block was completely revised and reinforced. The EA888 is considered the second T(F)SI generation. Further information with the exact differences can be found HERE.

Unfortunately, the timing chain is also one of the biggest weaknesses of this engine concept. The picture on the right shows a timing chain after approx. 160,000 km. In comparison to a new chain you can clearly see the difference in length! The status of the control times and thus the already advanced elongation can be checked with VCDS while the engine is running. Measured value block 93 shows the phase position between the sensors crankshaft and camshaft. A value of 0° is ideal. It becomes critical from minus 3°. If no VCDS is available, you can also check the extended path of the chain tensioner. There is a round rubber plug in the front cover. If this is removed, you can see the chain tensioner and its already extended path. From 3 links we recommend the exchange of the entire chain drive. Unfortunately also the engine control light does not warn in time of a too strong chain elongation. If in doubt, simply have it checked in the workshop before engine damage can occur!