doing timing after cam belt on a 8v pb gti

[richard s]

im doing cam belt soon and want to double check about the timing afterwards
1 set crank to tdc
2 set cam with mark on sprocket and housing
3 set rotor arm to notch on dizzy
once that is done and belt is tensioned
set timing to 6 degrees before tdc by adjusting dizzy
is this correct or do i set crank to 6 degrees before tensioning belt
cheers

[DarnPB]

If everything lines up both before and after the job, then theoretically, you should not need to re-time the ignition.

[danny_p]

get engine running, wait till fancomes on,  dissconect temp sender, connect timing light,  do the sequence of revs to put ecu in setup mode .  hold engine to required revs and adjust timeing to 6 degrees.

look in info and mantance  for detailed destructions   

[richard s]

i didnt read the last bit about revving to 2.5k
so when piston at top the little mark in flywheel should be aligned (theoretically)and when blue temp disconnected and revved to 2.5k the 6deg mark will be aligned
is that right because when i fitted engine i set crank to 6deg mark then fitted and tensioned belt then called a mobile tuner to do emissions and to be honest i get bad mpg and it doesnt seem to go like a gti should
so i just wanna double check that im doing it right before i fit new belt as im being a bit fick at the
cheers

[rubjonny]

yes the ignition timing MUST be set at 2.25k rpm.  The whole rev 3 times over 3k thing is only for setting the idle & CO, this doesnt have to be done when setting the ign timing.  I think this could mess up the ign timing as reving it over 3k 3 times puts the ecu in setup mode, so i dont know if the ign advance would end up wrong there...


either way I bet the mobile tuner didnt know about the rev over 3k thingeither, so the co probably isnt right either!

[richard s]

cheers going to fit belt tomorrow as weather looks ok
as for co it probably is wrong but passes mot so i may leave it for now as mot is due or see if they will let me use their machine to set it

[richard s]

done cambelt this afternoon but havnt had timing light on it yet also when i pulled no1 plug it was black so looks like it needs co setting up too

[Bjork]

Any chance you could take a few photos and step by step it. Other stuff on here seems too difficult for me to understand.

Cheeky I know but I'll love ya forever.   

[richard s]

hi mate if you look at top of mk2 section their is a maintenance section and a good write up is in there with some pictures
as for me getting pictures onto here i dont know how to  :embarassed:

[Bjork]

Fair enough mate.

I've looked at that one and it's all blah blah blah to me!!!  :embarassed:

I'll do some more research.