Re: Help, lost my tdc position
Just read your post, question is how many miles has your car done, I say this thinking that have the belts already been changed (by a previous owner or by a non A/R specialist)
There could be a possibility that the timing is already out...It will not be the cams that are out if the locking blocks are fitted, it will be your cranksahft that is out on the TDC position, with the blocks fitted the cams must be correct.
Is there a chance that someone has had a go before and not set it up correctly ?
If the cam locks are fitted correctly then the cams are in absolute correct position for the firing of no 1 cylinder, what needs to be set is the TDC position of number one cylinder.
With the cam locks fitted correctly, the old belt can be removed, and it seems in my limited experience last week that it is safe (with caution to slowly rotate the crank by hand to align TDC, note that you should have the camshaft sprockets undone, but just enough to allow them to move to take up the new belt tension.
when fitting your new belt ensure that the camshaft sprockets are rotated in the clockwise direction as far as the vernier movement will allow.
As for the crank pulley TDC position there is also a mark on the timing belt pulley sprocket that aligns in the (approx 9 o clock position)
Note on the timing belt crankshaft sprocket, not the balance belt pulley.
Set cams with locks in position, cam sprockets free enough to move, turn them clockwise.
Set TDC for crank shaft dti gauge or whatever method you choose, only rotate clockwise, yes two turns and slowly approach TDC, not past it, if you do pass TDC (sorry round again twice), use the mark on the crank pulley of the timing belt, (this means balance belt pulley removed from crank) only two ribe fixings easy job.
The mark on mine aligned at about the 9 oclock position for tdc (about)
Then fit your new tensioner and your new idle roller, torque up the idle roller, but leave the tensioner just nipped withe the slot on the plate fully up against the little spigot pin.
You can now fit your new belt with the marks on the belt aligning with the mark on the crankshaft pulley and the mark on the exhaust cam sprocket ( which seems to be in about the 2 or 3 oclock position.
Set tension to max on cambelt tensioner, then tighten your camshaft sprockets up....inlet 4 ribe fixings at 12 NM, exhaust one centre bolt at between 100 and 124 NM.
Now remove the cam locks and refit the bearing caps torque at 13/16 NM
Now rotate crank two turn back to TDC.
Now release tensioner slightly enough to adjust tension, and slowly release tension until the pointer aligns with the centre of the hole in the plate, lock up the tensioner about 28/30NM
Rotate two turns and chack all is ok and that the tensioner (which moves as it is a floating tensioner, still lines up with the hole.
Job done, providing TDC lines up after the two turns.
Hope this helps.