The gentleman I spoke with said that if it is in-fact the timing covers, that $6-7k is about right. He did say that it would be unusual for the covers to leak at 72k miles though, and thought that it could possibly be the filter housing leaking. I am going to drop the car with them for a second opinion. The average cost for an Audi A4 Camshaft Replacement is between $1,877 and $2,106. Labor costs are estimated between $876 and $1,105 while parts are typically priced around $1,002. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed. For a more accurate estimate based on Ultracharger is APR. There are other options though. And corn is definitely an option on these cars. The stock fuel system is capable of E30-E40 ish depending on tune and/or system condition. E85 is easy with an upgraded hpfp. 2013 B8.5 S4 DSG P+ w/ ADS. APR stage II ECU/TCU w/ CTS 187mm crank pulley, Roc-Euro Intake. Last one we did needed a $293 timing cover(cam bridge) due to the oil screen having come off of the original cover, so that was added cost. $1000 is not going to cover the complete repair as the genuine Audi parts alone are almost $1000(again, all depending what is taking place inside the engine). Hope that helps a bit, Jeremy Looks like my air pump is going or blew a fuse. I didnt see it in the service manual for recommended times. I'm at 150k miles and nothing has exploded just yet ( knock on wood) I had the tensioners done. $4400 at the dealership. 2013 with 95k. Found out around 88k and was fine except for the occasional rattle. A4 (B8 Platform) Discussion - Timing chain service/replacement - I am the second owner of 2008 a4 B8 1.8L TFSI CABB engine with 99419 miles on the clock, and from the below sticker I can confirm that the previous owner have't changed the timing chain! Hi Gang. I haven't posted anything in a while. I've had my B8 A4 for about a year now. Had some had work (read: head replaced) and water pump done but nobody bothered to update the timing chain tensioner on this beast. so my current trouble dealership says the timing chain has stretched "6 or 7 teeth" and needs to be replaced. Audi A4 B8 1.8 TFSI Timing chain failure. 1mm3. Jun 22, 2018. a4 b8 tfsi tensioner timing chain timing chains. Forums. Audi Forums A4 Series. Audi S4/A4/A4 Cab (B8 Chassis) 1. Timing chain replacement on this beautiful and loud Audi S4.Like, comment, share & subscribe to not miss any upcoming videos!CHECK OUT OUR WEBSITE & SOCIAL M I have an B8.5 S5 - similar issues. My timing chain jumped time by 2 teeth causing misfire on all of bank two. Luckily, no internal engine damage. Had to get timing chains and guides replaced - they did replace both banks chains and tensioners since they were in there. nbpG.