Head Bolts

use new bolts stage 1: 40nm stage 2: tighten by a further 60 -75 degrees stage 3: tighten by a further 60 - 75 degrees

Thanks, Engine is now back together and working fine, thanks for info :)

On a similar note, is it necessary to use an angle gauge or, for eg, if a bolt requires a 90 degree turn can you position the ratchet handle at the 12 o'clock position & stop at the 3 o'clock?

Of course you can, but it can be harder to gauge actual movement particularly at the later stges where you are really hanging on the bar.

The best tip for stretch bolts is that after doing the initial torque down , to mark every bolt head using a paint pen or tippex, then you can see at a glance which bolts you have moved and by how much. I usually try to paint a short line on each bolt's flange washer pointing to the rear of the car.