Hi there.
My 2007 Spec Edition S- Line 2.0 TFSi is making a funny ticking type noise on idle (when warm). The belt tensioner is also moving slightly from side to side. Is this normal? I didn't notice it before. It doesn't do it if you up the revs slightly.
Hi Shaunos,
Just to clarify there generally are 5 ticking noises on the TFSI motors. The best way to test these noises is to take a flat head screw driver with a long metal rod/shaft and put it on the part you want to listen to and put your ear on the other end.
1. If the noise is coming from the rear of the engine this will usually means the tensioner is worn/wearing out. As it will be causing slack in the timing chain and will in hind site cause the ticking. Usually a lot more pronounced when the engine is warm as the oil is thinner and the tensioner not lubed as much as it would be when the oil is thick. This noise will sound like a metallic noise. Especially if you idling and bring on the revs slightly you will hear the chain click as it takes up the slack.
Lol mine does this, if standing at front of the car its 2 the right of the lump and moves from left to right (aux belt)
This is normal.
2. Staying at the rear of the engine if you can find the high pressure fuel pump. Usually underneath the fuel pump is the cam follower. Which this is the Achilles heel of these engines as they tend to wear through more so on cars that have been modded or chipped. This is more so prone as well on vehicles with that are pre 2006 as most of the 2006 -2008 had the uprated cam shafts that are less prone to wear. Again this will be a very pronounced metallic noise especially when the engine is warm. Part number - 06D109309C
3. Moving towards the side of the engine underneath the black engine cover which will be the engine intake manifold which you will hear a very ticking noise as this is caused by the nature of the engine being a Direct injection style engine. Again this is normal and nothing to worry about.
4. There is a part known as the n80 or the purge valve now these tick like crazy. Thou I am told you can buy a new part for this as it is relatively cheap £10-15 and will stop the ticking. But I am also told they are prone to start ticking again even after purchasing a new one. Usually if they are proper faulty they will throw a 16825/P0441/001089 - EVAP Emission Control Sys: Incorrect Flow. Part number - 06E906517A
5. Last but no least the ticking noise you might be referring to from the pulley, basically if they start ticking they generally 90% of the time are on there way out.
cant remember the exact location but yes it does. out of interest when does the Aux belt need replacing? and/or pulleys?
They generally are advised to be changed at roughly the 60k mile mark for the belt as for the tensioners should easily get to 100k but like most things they dont always last that long.
Thou I am told when you replace the one you should replace the other thou that is down to customer preference.
Audi belt part number - 06D903137E - last time i checked was £16-18
Audi pulley part number - 06B903133E
The belt is made by continental/conti tech. So it is up to you if you would like to use the alternative brand.