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[Vauxhalloofer]

Hi Peeps i am in the process of getting the cylinder head off to do valve stems, Should the crankshaft pulley mark that aligns with pointer be backed off 60 deg Back from TDC before removing belt and cam sprockets and  bearing caps.If so does it have to be lined up dead on when refitting them or 60 deg again.Thanks 

[andymp]

What engine do you have... 

[Marks DTM Calib]

90 degrees before or after TDC (I always set before TDC).

On refit, set the cams correctly and lock using the tool, then align the crank to the TDC mark by rotating forward (or back if set after) 90 degrees.

[TheBoy]

4 pots, 90 degrees before TDC as Marks DTM says

[Vauxhalloofer]

Nice one , so it doesnt matter too much about cam positions before you take belt off. Ive taken the belt off with it about 60 degs btdc, marked the crank pulley position and the cams on my 2.2 are sitting 60 deg btdc from the markings on the cams to the cam cover on the rear. The cams are locked with the cam tool and the cars in its highest gear. Before removing cam sprockets with torx bit should i leave locking tool in and hold the cams with a spanner or remove it,Ps if i can do this anyone can lol Thanks. 

[PhilRich]

Vauxhall state 60deg. BTDC for 4 pots

[Vauxhalloofer]

Ok so should be ok where it is, what should i do about the locking tool on the cam sprockets before taking them off.Leave it in or take it out.Cheers

[Vauxhalloofer]

[PhilRich]

Leave it in until you're ready to remove the sprockets/cams. Don't forget, the sprockets are supposed to have new bolts on refitting
Take photo's of each stage of the job, especially cam/crank positions

[Andy H]

Vauxhall state 60deg. BTDC for 4 pots

It isn't critical, it is just a safety measure to get the pistons far enough away from the valves that you can turn the camshafts and not get contact between valves and pistons.

If 60 degrees works for every engine in the VX fleet it saves thinking time in the workshop.

[Vauxhalloofer]

Wicked thanks people, got the head off, loads of oil in the inlet manifold,headgasket has blow right near the metal ring so i guess it was loosing water maybe into the oil. Taking head to local engineering firm to get it checked, skimmed.Getting a bit more used to working on the car now lol .Ive got a question about the cam timing though,should the crank be set to 60 deg btdc before the head goes back on, then head bolts torqued then lay cams in setting them to tdc marks on belt cover at 12 oclock lock the cams then bearing caps on.I suppose you then line up crank pulley to tdc pointer mark then refit belt.Is this correct.Thanks peeps