righty ho .. here goes 1999 escort 1.8 td ,, takes a long while to heat up ,once hot heater ok for 30ash miles then starts to blow cold check water in header its ok ,, undo water bleed tap {on thermostst pipe} let water replace airthen top up with bout2 pints of water no signs on any pipe or joint or signs of hesd gasket gone,,, any ideas anyone
ps there are 2 HARD PLASTIC GROMITS with small holes in are these supposed to be there ??????????????/