Continue Audi A8 4.2 V8 timing preview repair

[@henktulp4400]

Hi Timothy!....I have just done an Audi V8 cambelt change...first of all:it is not easy!!...secondly:there is something tricky about the way EVERY factory wants you to replace the timing belt:they want you to put the engine on 1st cilinder TDC...(TDC is Top Dead Centre:piston at the exact top end of it’s stroke)....there is an undeniable risk in this;if the piston (regardless witch one or how many) is on TDC there is a risk of valves touching them....when removing the old belt it is very common for a camshaft to be pushed one way or the other,ie rotate....normally no problem;as a clever mechanic you already made some marks to be sure you can always return everything in it’s original position!! But as the camshaft (or more than one) makes his little jump tiny 6mm valves can easily hit a piston and get damaged....you’ll be on your way with a very bad mood and a cilinderhead to an engine overhaul place.... Fortunately when switching of an engine (any engine..) it is likely to stop where a piston meets the pressure somewhere up the compression stroke,stopping it well before TDC.....the chances any piston is at TDC are very low....as you remove the belt nothing can happen,no valves can reach a piston... Obviously with this plan of attack you need to make your own marks on all shafts/gears involved BEFORE removing the belt,because as far as I know all factories place their marks on TDC (normally cil no 1 end of compression stroke) involving the risk described.... I have done so for the past 45 years and it never failed me....including the Audi V8... Audi made it even better for me..on the PULLING side there is a tensioner pully that is fixed solidly after tightening it....at the slack side of the belt (just before the belt gets driven again by the cranckshaft gear) there is a spring loaded tensioner that is moving freely to tension the belt and compensate for stretch and wear... The tensioner pully on the PULLING side of the crankshaft enables you to adjust the position of the camshafts compaired to the cranckshaft!! In my case it all came together beautifully:the camshafts lined up perfectly (plus a little extra to compensate for stretch!!) it corresponded perfectly with the 5mm stroke Audi wants on the springloaded,hydraulic dampered tensioner before belt is at operating tension. A lengthy explanation....but I hope it will be of help to some of you....follow the advise of not using factory marks at your own peril....obviously after fitting everything you make a check by rotating the cranckshaft at least twice....(by hand!!) and re-adjust belt tension if necessary as it aligned itself on all the gears.... I think if you manage the Audi v8 timing belt.....you shouldn’t be too worried about any other timingbelt you come across..... Good Luck!!

[@interworld75]

This is cool I’m hoping to get my 1.8 t Jetta engine switched soon. This will help, the 1.8t is basically half a A8 engine. I do have a bunch of A8 D2 stuff left over.

[@zech007]

Your timing is off, you'll need to inspect the variable valve chain tensioner on the (passenger side or right side) it most likely have a broken guide or the unit itself is falling apart.

[@CarlosSanchez-vx2ge]

Is it possible for one of the timing chain guides to let go without destroying the whole timing belt

[@zionalberto7680]

you probably dont care but does anybody know a tool to get back into an Instagram account?? I was stupid forgot the password. I would appreciate any help you can give me.

[@dakarigregory2444]

@Zion Alberto Instablaster =)

[@zionalberto7680]

@Dakari Gregory I really appreciate your reply. I got to the site on google and I'm in the hacking process atm. Seems to take quite some time so I will reply here later with my results.

[@zionalberto7680]

@Dakari Gregory it worked and I finally got access to my account again. Im so happy:D Thanks so much, you saved my ass !

[@tomaszbyczek7611]

Have you locking pin in position ?

[@nedudki]

if it would be in position, he wouldnt have to make it.....

[@CarlosSanchez-vx2ge]

The timing belt was maybe done bfor and wasn't done right

[@mecanicadsm]

Parabéns pelo vídeo.

[@albatross9131]

I can assure you, that isn't how you do timing on an Audi. Do yourself a favour, get a crankshaft locking pin and a sprocket puller. You can then do the job easier, in less time and your timing will be correct! Everyone seems to overthink the belt and chains in these engines.,seriously it's the easiest engine to time if you buy the tools, they're not expensive!

[@ascending74]

Lol