Moe1354

to be more specific on the type of engine it is 2000 A8.2L AKB

SloopJohnB@mac.com

you can google for ft-lb to NM and vice versa conversion.
Convert newton meters to foot pounds - Conversion of Measurement Units
5NM is 3.7ft lbs or better use an inch-pound wrench…44 in-#

Using a 0-150 foot-pound torque wrench on a 4 ft-lb bolt is just asking for trouble.

You might also want to change the thread title…it comes up 2.8 cam tensioner and chain replacement.

indoor

Scroll down in this thread https://www.audiworld.com/forums/a6-...blems-2872072/
to see how and what to look for when it comes to marking the chain...look at Cruby's posts

Moe1354

Yes, thank you for the link, I ref. to Cruby’s very thorough and detailed post before.

What is confusing in my case in not having the arrow and the notch line up on the exhaust cam!!! It does line up on the intake cam but not on the exhaust. Can I go forward with the job by basically just marking the chain and the sprockets? Bare in mind that the timing belt and the bearing cams or still intact, in any case I will not be touching the timing belt, so I don’t think I have mess anything up yet 

I know there have been some work done on the tensioner before, so I’m guessing the mechanic who did the work did not line them up while working on the tensioner. What do you think?

SloopJohnB@mac.com

Hard to tell without photos…my bentley ebahn (new beta online version) has different timing specs for bank 1 and bank 2 cam timing chains, plus different specs for used vs new cam chain.
Also, one pic in the bentley (could be wrong for all I know) shows the exhaust cam timing mark slightly offset from the sprocket valley that counts as roller 15 or 16.
Helps to get the bentley book so you can see the diagram.

CRuby

Keep in mind that my (CRuby) posts & pics are for a 2.7 & I haven't worked on a 4.2 to know if the cam/crank timing is set up any different. I suspect it's just 2 more cylinders (V6 vs V8). I didn't go thru all the upstream posts, so maybe I'm repeating what's already been said.

Sounds to me that you might be needing to touch the timing belt if you're at TDC & exhaust cams not lining up notches with the arrows (^).
But 1st, to keep from having a nervous breakdown, like I did, check the tensioner part numbers & make sure they are on the proper side. If some fool switched them (L-R vs R-L) then that will create more problems for you.

1st step is putting engine @ TDC. Align timing mark on crank pulley & install crank lock pin to be even more certain. If you don't get this right then cam timing can't be checked. Now if timing belt is installed correctly, then both bank 1 & 2 exhaust cams should align notches with bearing cap notches. If either doesn't line up, then I suspect TB jumped a tooth, or was not right from the last time it was touched. If exhaust lines up OK, but intake marks do not, then tensioner or chain roller count is bad.
Keep in mind the timing belt times the crank to both exhaust cam pulleys, & the cam chains & tensioners time the intake cams to the exhaust cams.

indoor

When you set TDC, what's important is the notch on exhaust cam(or the timing belt cam).

Try to see if the lines on crank shaft match.http://img.happywrenching.com/audi/a...aft-timing.jpg
If they do, remove intake cam shaft and upon reinstalation make sure the notch on intake cam lines up with arrow.

How far off are the different cam notches anyhow? Because of the tensioner issue, the notches don't line up, as in the chain jumped off the intake cam sprocket and skipped a tooth or so...not necessarily last tech installation...

Moe1354

I have not attempt to do a TDC yet, but when I opened the valve cover I noticed on the exhaust side the notch already lines up with the arrow, the # of chain links are ok as well, now the question is: does the notch on the intake cam needs to be lined up as well before taking the cam cover off or can I go ahead and proceed with the tensioner replacement with marking the chain and the sprockets as is.

indoor

Technically if the notch on exhaust cam lines up with arrow on end cam cap you have TDC. To make sure tough you would have to check the crank shaft line and arrow to line up(pic in previous post for reference). And put the crank lock pin in(that would the the safest surest way, with the crank lock pin, and you can find them on ebay cheap.)

If I were you, I'd buy a Bentley cd repair manual specific to your vehicle. You can go on the specs I provided if you want, but this is a 4.2 engine code ART.

Mark the chain as is and the sprokets for reference. If engine is at TDC remove intake cam caps. There is a sequence required provided in videos posted and pics. I'll try post some pics from instructions. I would at least read Blauparts instructions if you can't afford Bentley cd(though you would save lots of money by doing the labour yourself).

indoor

Doing this off my IPad so I don't know how to attach multiple pics. You don't have to touch the exhaust cam, obviously...