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How To.. replace a cam belt on an Alfa Romeo 2l engine

Models covered:
Alfa 145, 146, 147, 155, 156, 166, GTV and Spider with 2.0 liter engines.

The 2.0l 16 valve engine is quite a difficult engine to replace a cam belt on as there is also a balancer shaft belt to replace at the same time. In order to complete the task correctly you will need some specialist Alfa Romeo tools these comprise of two locking tools for the camshafts and a dial gauge to find top dead center.

Remove rocker cover

The first task is to remove the upper rocker cover which is secured by 4 ribe fasteners, once this is removed the plug leads and coil packs are exposed, these are secured by 3 fasteners on vehicles with an alloy rocker cover and 4 on plastic rocker cover cars, the plug caps can then be carefully removed and put to one side.

The rocker cover is now ready to come off. Once this has been successfully removed the camshafts are visible and the locking tools have to be fitted to cylinders 2 and 3 this may involve rotating the engine. Number 1 spark plug on number 1 cylinder needs to be removed and the DTI should be fitted down its hole.

Next we have to remove the side covers of the engine to expose the cam belt, in order to do this we remove the right hand front wheel, under tray and wheel arch liner, once this has been removed we have to take off the auxiliary belt, to do this we use a spanner to slacken of the automatic tensioner and then remove the belt. Check the auxilliary belt hasn't perished (perpendicular cracks when you bend it) On all cars we now need to remove the lower crankshaft pulley and then on cars with air conditioning we have to remove the idler from above it, in order to do this you will have to remove a small cover that protects the fastener. The cam belt cover can now be removed to expose the belts

Now we can remove the balancer shaft belt and the cam belt by loosening the center bolts of the tensioners. You will note while you are doing this that the tensioners may be made of plastic and they will also need to be replaced as they have a tendency to explode which has the same effect as a cam belt breaking as the belt goes loose and slips over the cam wheels. The idler on the opposite side of the cam belt will also need to be replaced as it is usually noisy and usually part of a cam belt kit. Many people like to replace the water pump at this point as it is very easy to do, however we have little problem with these. It is advisable to replace the cam variator which is in the center of the inlet cam pulley as these are nearly always noisy and all you have to do is unscrew it.

To refit the cam belt you reverse the process, however there are some points to note, the first of these is you need to slacken the center bolts of both the inlet and exhaust cam pulleys so they are able to move a little and then tighten the cam belt using the cam belt tensioner before re-tightening the center bolts on the cam shafts. You will then need to fit the balancer shaft belt and to do this you align the marks on the belt with the marks on the pulleys you are now in a position to fit all the other parts back on.

Torque settings
Crankshaft pulley bolts 21-26 Nm 15-19 lb.ft

Timing belt tensioner nut 24-29 Nm 18-21 lb.ft

Balance belt nut 12 Nm 9 lb.ft

Inlet camshaft pulley bolts 12 Nm 9 lb.ft

Exhaust camshaft pulley bolt 100-124 Nm 74-91 lb.ft

Camshaft bearing cap bolts 13-16 Nm 10-12 lb.ft

Valve cover and timing belt cover bolts 9 Nm 7 lb.ft

Water pump bolts 17-21 Nm 13-15 lb.ft

Variator solenoid bolts 14-20 Nm 10-15 lb.ft

Related Links: Alfa Cam Belt Special Offer | Fixed Price Servicing | Alfa Romeo Cam Belt Kits | Alfa 1.6 & 1.8 Cam Belt Replacement | Alfa v6 Cam Belt Change

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