Cam chain adjustment

Nice easy job, but potentially risky, so be careful. It’s a good idea to set the tension at every service.

WARNING: Never try to set the tension without turning the engine. You could end up with a slack chain, and do a lot of damage.

Hayne’s method:

There is a possible danger here that some slack could be introduced, especially if the engine misfires.

1. Run the engine up to temperature, and let it idle at 1000-1200 RPM.
2. Slacken the adjuster release bolt. Facing the engine, it’s on the front left hand side of the head: Note: Be careful! Keep well clear of the HT leads and moving belts.
3. Run the engine for a minute or so, to let the adjuster spring take up any slack.
4. Tighten the adjuster bolt.

Alfa Romeo factory method:

Thanks to Ram for this info.

1. Run the engine up to temperature, then stop the engine.
2. Slacken the adjuster release bolt.
3. Select 5th gear.
4. Push the car forward to rotate the engine one revolution. (surely this should be two revolutions?)
5. Tighten the adjuster bolt, making sure that the vehicle does not roll back.