My 2006 opel corsa utility bakkie using a lot of petrol like 7km per litre.

SOURCE: car switching it self off while running

if ur engine is a c14nz its probabbly ur ignition module, its the part right behind your ignition coil, when they get too hot they stop sending the electricity needed and the car just dies while ur driving it, after a few minutes it cools off and then u can continue yout trip...
must be replaced to fix the problem
if ur engine is not a c14nz, let me kknow wich one is by giving me your vin number and also engine number so i can give u a hand
let me know

SOURCE: 2001 opel corsa 1.4 is utility. Snapped the

Likely you are talking about the harmonic balancer.
The bolt turns counter clockwise and is generally removed using an air gun. There is another way to do that too but it is a bit dangerous. Using a solid breaker bar (one without jointed end) you can brace the end against the ground with the socket installed on the crank bolt (I actually have a pipe driven into the ground outside just for doing this...I just slide the bar into the pipe and keep it form dropping by using a vise grip on the handle). Once the socket is on the bolt, crank the engine over using the starter, the engine will force the bolt to back out.
After you get the belt installed, tighten it as much as you can by hand and ask a shop to just give it a final tightening with an air gun.
If the socket slips the bar can fly up so be very careful and don't stand where it can hit you!

SOURCE: timing marks on engine

Use the timing marks on the damper for the crank and bring it to 0 on the cam there are marks that correspond with a mark on the head. Look on autozone dot com and put in the year make and model then look at the free repair guides.

SOURCE: how do i get air bubbles out of my water on a opel corsa 2007 utility pls help

if there are air bubbles while the engine is running it means your head gasket is blown.

SOURCE: Replased head gasket how do i set the timming and what is the valve clearence for opel corsa 1.7 diesel bakkie

its shim tappet adjustment and you need to have a dial guage to set timing ,,,