Page 1 of 1
camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Sun Jul 12, 2020 5:44 pm
by Gavinda
still working thru issues on the avant.
intention is to double check belt timing and see if the vvt solenoids are operating or out of spec.
so looking at
VCDS measuring block 90, 91,92,93
if 90 is within spec does that refer to timing of the belt ie. static timing .
my thinking is that timing is good but bank 2 solenoid is knackered .(or have i go it back to front?as in belt timing out and solenoids fine)
90 is showing bank 1 = -0.5 bank 2=- 0.5
93 is showing bank 1 = -2 bank 2 = -9
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Sun Jul 12, 2020 6:25 pm
by Shoppinit
There was a huge thread on this fairly recently.
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Sun Jul 12, 2020 6:29 pm
by Shoppinit
Not sure this is the one I'm thinking of, but there's some useful info in it:
viewtopic.php?f=2&t=133626&p=927996
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Sun Jul 12, 2020 6:30 pm
by Shoppinit
Either way, 9 degrees out is waaaay too much.
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Sun Jul 12, 2020 7:55 pm
by Gavinda
Oh, that thread is great , thankyou
I was looking at another couple of older threads on here regarding it, but this one is more definitive
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Mon Jul 13, 2020 2:59 pm
by Mɐʇʇ
FWIW, I've struggled to get it "perfect" both times I have done the cambelt - although as you can see, I did eventually get it just right.
My lessons:
1. Make sure the cam chain shoes are in good order. I am running one new advancer, and one with replacement shoes on. Both are great. Don't use blaupart shoes, they are slightly different sizes, oddly.
2. Don't worry too much about the chains unless you have a lot of mileage - with my digital calipers I couldn't measure any stretch at all between my old chains and new (86K miles)
3. Use a dayco belt, not a contitech - it has a slightly better located fit on the gears. I went full OEM this time - but you can piece your own set together of non OEM equal quality if you research.
4. In the end, *ALL* the difference on mine between 5 degrees and 0 was the tolerance of the belt to the cam & crank wheels and the tolerance the locking bar has in it too.
So just a few goes resetting everything (slackening off the cam bolts a sniff, putting the puller on to crack it off the cam head, then cam lock back on and just giving it a tiny tweak) got it perfect.
It must be my technique that sucks!
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Mon Jul 13, 2020 6:22 pm
by Classik
Good tips ^^, Ta
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Fri Jul 17, 2020 4:01 am
by Gregstv
Did you sort this out?
Re: camshaft timing+ vvt phasing , measuring block 90 , 93
Posted: Fri Jul 17, 2020 1:26 pm
by Gavinda