ABY Timing Belt Renewal

[terrybullwon]

Here you go

[TimE-J]

That looks like a good piece of kit, that put a few more ideas on the drawing board! Cheers mate.

[A80Avant]

I know this is the ABY timing belt but I just checked for the ADU one and it now retails at 97€ from audi in Germany!!!! Yikes!!!

[Monkeymagic]

That counter hold is for a t4 5 cylinder. Its what i intend to use when i tackle mine.

[John.]

Regards the 450Nm = 200Nm + 180 degrees.

Regards the 450Nm = 200Nm + 180 degrees.
I've just done the belt, pump and idler on my 7A engined coupe.........and here's a picture I've taken of the pulley.



I marked the head of the bolt and then torqued it to 100Nm, then marked the pulley.
I then torqued it to 200Nm......and marked the pulley.(The torque wrench used was calibrated about 3 months ago.)
Observing the difference between the 2 marks I then marked the pulley with another 2 paint "dabs".....to give an idea of 300Nm and 400Nm.
It was at this point that I thought 180 deg from the 200Nm mark might be about 1000Nm?!
.....anyway using a 3/4 drive socket,t-bar and small length of scaffold tube, I "nipped" it up a bit and the pic above shows where it finished up. To me it felt f***ing tight.
Incidentally when I slackened the bolt at the start I used a 1/2 inch bar and it broke free 1st try, it had thread-lock on it and hadn't been touched since the belt was fitted 5 years(15k miles) ago. I have the receipt from the garage that done the job-the original bolt was re-used.
Now, I'm thinking maybe the pitch of the thread on the bolt is different from that of the S2 engine??........but I understand that the crank is the same??(yes/no)......so surely the pulley and bolt are the same?

.......anyone?

[Jonas_R]

200 + 180degrees is more accurate then 450 Nm. Then last 250 Nm can vary alot depending on friction etc. in the bolt thread, where as 180degrees will always be the same.

[irishs2]

John , is that a new bolt or the old one?

[newsh]

That's not a new bolt.

[John.]

John , is that a new bolt or the old one?

Original bolt.

Happy with it but plays on yer mind a bit!!

[irishs2]

Nothing major, I was just thinking about the torque comment, and Jonas's comment on friction.
New bolt vs old bolt surface ,rust and no rust etc.

But yea I would always use a new one

[John.]

Nothing major, I was just thinking about the torque comment, and Jonas's comment on friction.
New bolt vs old bolt surface ,rust and no rust etc.

But yea I would always use a new one

Fair enough.