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Author Subject: Cam belt timing problem??
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Location: High Wycombe

Registered: 15 Aug 2004

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Post #1
Hi people, I've had a head gasket go on the gti and am giving it a go myself but have never done one before (or cambelt) but so fingers crossed all goes well Whistle So I started taking it apart about 9 this morning and had it all off by 2ish but what fun and games I had....Yes

So taking of the inlet mani, cam covers, connectors ect all went well then I got round to locking the cam pulleys and crank pulley. Now last year I had someone else do a cambelt and pump change on it and at the time he said the crank pulley had slipped, and I thought it might of happened as the car had done about 50k on that belt. I got a new pulley and he fitted the belt with no issues.

So when I came to lock the pulley today the cams lined up nice but the crank pulley was out. The locking hole was at about 5 'o' clock instead of being about 10 'o' clockish. My question is "has the crank pulley slipped again or is it out of time?" Also where should the Pistons sit when the crank pulley is locked in the correct position?

I found the only real pain in the arse with this job was actually lifting the head of because I left the exhaust mani on. I then realised it wasn't coming out with it on so had to remove it which meant me getting on the back of the head with a Dremal to cut 3 of the 8 bolts off Angry It then came of fine. I now have to get the head checked over and possibly skimmed.

Any advice or info from anyone in the know would be much appreciated.Thumbs up

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Posted 29th Dec 2015 at 19:33
scotzman

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Location: Dundee

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Post #2
The pistons should all be at mid stroke with the crank pinned.

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'90 1.6 205 GTi, '98 306 GTi-6
Posted 29th Dec 2015 at 19:24
rudolf

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Location: Skelmersdale

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Post #3
All pistons are level when timed up correctly

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Posted 29th Dec 2015 at 19:24
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Post #4
Nice.....

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Posted 29th Dec 2015 at 19:26
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Post #5
Is that level mid stroke then or should they be at the top? I'll get some more pics tomorrow of how its looks at the mo.
Posted 29th Dec 2015 at 19:29
scotzman

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Post #6
All level midstroke.

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'90 1.6 205 GTi, '98 306 GTi-6
Posted 29th Dec 2015 at 19:31
scotzman

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Post #7
Also this...

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'90 1.6 205 GTi, '98 306 GTi-6
Posted 29th Dec 2015 at 19:32
scotzman

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Post #8
Buy a new pulley or borrow a Known good one when you time it up just to be sure.

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'90 1.6 205 GTi, '98 306 GTi-6
Posted 29th Dec 2015 at 19:35
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Post #9
Are you saying that is where the "notch" on the crank end should be? Thanks for the quick response chap.

And yes will get a new pulley just to make sure......
Posted 29th Dec 2015 at 19:37
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Post #10
Can you lock the flywheel on the gti because I couldn't find the hole when turning it?Dunno
Posted 29th Dec 2015 at 19:40
jeffers Forum Owner

Location: Leeds

Registered: 14 Dec 2003

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Post #11
ad wrote:
Can you lock the flywheel on the gti because I couldn't find the hole when turning it?Dunno

Nope, get a known good crank pulley or a Rich w solid alley one to ensure its right.

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Posted 29th Dec 2015 at 19:59
cully

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Location: Cullompton

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Post #12
there is no hole in the flywheel
Posted 29th Dec 2015 at 20:01
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Post #13
I was thinking of an ally one but not sure at the mo, she's a bit of a mess compared to my phase 1. It might have to turn into a project or track slag but I'm still undecided. One of the last Gti's made I think- registered March 2001.
Posted 29th Dec 2015 at 20:06
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Post #14
cully wrote:
there is no hole in the flywheel


Thanks for confirming, that's why I couldn't find the hole then.Roll eyes
Posted 29th Dec 2015 at 20:08
honestly3k

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Post #15
Was this the Y-Reg Diablo over in High Wycombe for sale on Autotrader a couple of weeks back?

Was for sale by some chap who works on farming machinery.
If so I believe i was the first to view this....

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Posted 29th Dec 2015 at 20:12
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Post #16
honestly3k wrote:
Was this the Y-Reg Diablo over in High Wycombe for sale on Autotrader a couple of weeks back?

Was for sale by some chap who works on farming machinery.
If so I believe i was the first to view this....


How strange.... No it wasn't but I bought it from a bloke who had it on autotrader for £700 back in May 2014, and it is a Y-Diablo. Why have i not seen this other one, how dare they.....Shock
Posted 1st Jan 2016 at 08:00
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Post #17
This is how the Pistons are sitting with the crank pulley pinned, is this correct or are they out? I have a feeling they are out.Dunno Sorry for the dark pic but you can make out where they are sitting. Cylinders 1 & 4 are up top and 2 & 3 are down. Sad

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Posted 1st Jan 2016 at 08:01
cully

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Post #18
bin that pulley they all should be mid point level
Posted 30th Dec 2015 at 19:20
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Post #19
Right ok that's what I thought, thanks for confirming.
Posted 30th Dec 2015 at 19:24
cully

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Post #20
on some of the pulleys there are alignment marks to show if the pulley has slipped on its rubber bonding's

note the inside mark ref to the outside mark on the photo

Posted 30th Dec 2015 at 19:37
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #21
No need to buy a new pulley, simply set the bottom end to what the picture in post #7 shows. If the woodruff key is pointing direct to the left gold bolt (I.e. 9 o'clock) then you're all good. You can confirm it by measuring the height of each piston in the bores and make sure they're the same. Thumbs up

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Posted 30th Dec 2015 at 23:49
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Post #22
stan_306gti6 wrote:
No need to buy a new pulley, simply set the bottom end to what the picture in post #7 shows. If the woodruff key is pointing direct to the left gold bolt (I.e. 9 o'clock) then you're all good. You can confirm it by measuring the height of each piston in the bores and make sure they're the same. Thumbs up


I see what your saying, I was thinking that to be honest. At least I know where I am with setting the bottom end up now. Thanks for the help people. Thumbs up
Posted 31st Dec 2015 at 09:08

Adrian Flux
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