alfa 156 timming - Alfa Romeo Forum
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alfa 156 timming

hi, when having the cambelt and variator changed, and having the right tools to do it.i.e camlocks, how do you know if the timming is right in the first place, how do you time the car?
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If your doing the job yourself you've got a lot of reading to do.
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If the belt is intact then the timing will be correct and the cam lock tools will keep the top end correct - if you have the dial guage you can move the crankshaft to tdc - you can also do the same thing with a less accuracy with a screwdriver in the plug hole on no.1 cylinder - if you take your time it is a job within the realms of a competent diyer but definately not for the faint hearted because if you get it wrong there is a good chance of wrecking your engine
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The camlocks are for that very reason, they position and lock the cams in the correct position.
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thanks alfa amore, great help
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Originally Posted by alfa amore View Post
If the belt is intact then the timing will be correct and the cam lock tools will keep the top end correct
Not strictly true, as there are occasions when the belt looks fine but it has skipped a tooth, it's the reason you loosen the cam pulleys when fiting a belt to get the tension accross the belt correctly.
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I have yet to find a TS that has had the timing correct before I started the job.

Either the belt stretches slightly, or the job wasn't done properly the last time.

The easiest way to check is to set Cylinder 1 at TDC on its compression stroke, and if the camlocks fit in the right place then the timing is fine.

You still need the locks when fitting the new belt though.
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