no bleed valve is fitted. is your heater running cold.when u take the cap off the expansion tank with the engine running can you see water coming back out of the return pipe, u should be able to if not the water pump is faulty. have you fitted a new thermostat? and the heater is still cold. ive just fixed this problem u have to do the following 1. remove radiater and flush out well i filled mine with a bottle of domestos and left over nite then flushed out 2. reverse flush haeter matrix take the pipe off the thermostat that leeds to the bulk head for the heater insert hose pipe in to this hose and then flush until water runs clear 3.remove and fit new water pump with new timming belt and adjuster the immpella on the water pump dissolves with age and this is what causes your heater not to haet up.
