It's quite a simple job on the 10v.
SEE END FOR SOME PICTURES!
Raise the vehicle and remove road wheel
Remove the wheel liner behind the strut to gain access
Take a good look at how the auxiliary belt is fitted...you'll need to remember this to put it back on
Loosen the tensioner of the auxiliary belt and remove it....it's on the right near the alternator.
remove the flywheel by undoing the alan bolts and prising off with a puller or carefully by edging off side to side.
Locate the location mark on the crank shaft now the flyweel is off. It's a small nick near the outer circumference. You'll need this later.
Remove engine cover
Remove engine stabaliser bar
Disconnect the re-feeder to the water resevoir (top one pointing to engine). Water may come out but only a tad. Just bend it over.
Cover is in three parts - remove the top two only. You should not need to take the bottom one off to feed the belt
Remove the idler as part of this process.
You'll find top left cover easier to get off if you unbolt the engine mounting (two bolts and an alan bolt) over the timing belt first as the cover bolts to it.
Access the bottom cover from the wheelarch...it's a bugger but only remove if you have probs feeding belt round
Locate the single timing mark....it's a small point on the black plastic housing for the timing cover. TIP look at the cam shaft as if it were a clock. The timing mark is at 1.00 o'clock.
Locate the timing mark on the cam pulley....it's a very small notch on teh outer edge.
Get a bar onto the crankshaft and crank by hand till you line the notch in the pulley with the timing mark. Stop!
I WOULD lock up your cam shaft! Makes the job easier and you've bought the tool
Spend five mins to get the cam cover off
Fit the lock!
(If it slips round even one notch as you aim the cam mark it will run like ****. Needs to be just nice and taught between cam and crank to get proper alignment and timing.
Remove the old belt.
Fit the repalcement
Your new belt has two timing marks
Run the belt through your hand and hold the two marks. Make sure there is less belt between your hands than there is slack. Mark in the left hand goes to the cam shaft and the right hand is for the crank shaft!
Get the belt roughly in position as shown on the box
Align the camshaft mark first then (drawing the belt nice and taught) run it down to the timing mark in the crank shaft (if nothing has moved it should line up exactly with the crank mark but it may be a fraction out. This is fine ASSUMING you've drawn the belt tightly to the mark. Just adjust the crank a fraction to line the belt mark with the notch)
You do not need to worry about the pressure pump. It's not timed.
Tension the belt using the tool. Correct tension is achieved when the arrow points to the 'u' hole in the tensioner plate
Remove the cam lock. Job done!
Rebuild is the reverse (remember to replace the idler with the new one)
(I I've missed anythin, sorry)
Cam Belt Change Guide on Alfa Diesel Engines