Timing - Alfa Romeo Forum
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(Post Link) post #1 of 7 Old 29-04-15 Thread Starter
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Hey Guys

Hope you all well. Need some advice or info on timing on 155 2.0 T.spark 16 V. I need to know how to set cams in correct positions before replacing the belt without those fancy tools. I only see one mark on the exhaust cam pulley and no other markings. Please help
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Well there are no accurate marks, so you really need to borrow the cam locks from somebody.

There is another way if you're sure that the current belt is timed correctly, but really you need to find some locks.
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As above, there are ways if you know the timing is correct with current belt.

It would involve something like below .... please note, i have never done this, and don't recommend doing so !!!

You would need to acurately mark the position of the two cam pulleys relative to each other (and the head) once the mark on the crank pulley is lined up, and piston no.1 is TDC.

You would also need to mark the belt and relative position on each of the 3 pulleys.

You then transfer these marks to the new belt, making sure the number of teeth between each mark is the same as old belt.

Then comes the hard bit, making sure the cams don't move when you remove the belts, which is what the locks do !

If you have enough hands, you could hold the cams in position as you place the belt on and get some tension into it.

If ALL the marks made are lined up, then the timing should be correct.
But as above, I WOULD NOT recommend doing it like this.

I've never used this process.
for the amount of money they cost, you'd be better off buying a set of locks, or borrowing some.

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(Post Link) post #4 of 7 Old 30-04-15 Thread Starter
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thanks guys. this helps a lot.
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The locks are not very expensive btw
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Stay in this weekend.. save £20.. buy cam locks..

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The cam locks can be printed in a 3D printer. Works fine.

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