willay
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Registered: 10th Nov 02
Location: Roydon, Essex
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Hia,
In the process of slowing ripping off bits from the 20XE to remove the head. I've been told I need to set the timing to top dead centre before I whip the head off.
Now I've done some searches (on mig mostly) and they say about lining up the crank pully mark with the mark on the casing. I've also looked into Haynes which mentions there are notches on cogs which match up with the casing 
To make things more confusing I've read alot on MIG That the pullies are known to slip abit making the notches absolutely useless...
Thoughts/ideas/suggestions, I've never done this before so I'm really looking forward to it  
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jr
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Registered: 20th May 02
Location: Kent
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how can the pully slip
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corsaandy
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Registered: 29th Jan 03
Location: Northamptonshire
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think the slipping pullies will only happen when you running verniers if you have got standard pullies then i would worry about it as they are notched on.
All you need to do is get a socket on the bottom pulley bolt (e20) or on the cam pulley bolts (15mm) and thurn the engine over until the notches on the cams line up with the notches on the cam cover behind it if you are running a standard setup then its should be pretty obvious to see all the nothces.
Then after you have done that just check that the bottom crank pulley is lined up at the bottom aswell, this one is alittle harder to see but there is a pin like thing sticking out from the engine that shouold lijne up with a small notch on the pulley.
[Edited on 06-09-2006 by corsaandy]
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jr
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Registered: 20th May 02
Location: Kent
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they way to find it on karts, which must be the same,
is to remove no1 spark plug
and put a dowl down it
the turn the engine over by hand untill the dowl is at is uppermost point  thats tdc 
[Edited on 06-09-2006 by jr]
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corsaandy
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Registered: 29th Jan 03
Location: Northamptonshire
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yeh you can do that aswell
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willay
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Organiser: South East, National Events
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Registered: 10th Nov 02
Location: Roydon, Essex
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quote:
Originally posted by jr
they way to find it on karts, which must be the same,
is to remove no1 spark plug
and put a dowl down it
the turn the engine over by hand untill the dowl is at is uppermost point thats tdc
[Edited on 06-09-2006 by jr]
Yep the rod/screwdriver/whippet method was mentioned quite a few times and that sounds good - Just need to take the other spark plugs out to ensure I'm not gimping my arms against pressure.
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jr
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Registered: 20th May 02
Location: Kent
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im glad i could help  , and yes that may be wise 
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willay
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Organiser: South East, National Events
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Registered: 10th Nov 02
Location: Roydon, Essex
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Since taking the loom off my engine I'm not scared of death anymore.
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jr
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Registered: 20th May 02
Location: Kent
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good good 
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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dont get confused with the difference between TDC and the marks on the cams.
vauxhall timing marks are about 15 degrees out from true TDC
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ed
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Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by jr
they way to find it on karts, which must be the same,
is to remove no1 spark plug
and put a dowl down it
the turn the engine over by hand untill the dowl is at is uppermost point thats tdc
[Edited on 06-09-2006 by jr]
What this man said. I didn't bother when I took my engine apart though. Don't know if that's a bad thing though.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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i always find the point where all the pistons are halfway through their stroke when removing a cylinder head.
when you put the head back on theres less chance of the valve being open and resting on the piston as its hard to get the cams to TDC when refitting the head.
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