Having it onfull heat won't make any difference as there is no tap in the heater line.NELLY said:Hi i usually top any car i,m doing back up to the cold level on expansion bottle then high idle for about ten minutes with expansion bottle cap off on full heat and full blower should be blowing warm air by then then let it cool and top up bottle back to cold level never had any probs yet did my dse a month back that way and it was fine . rgds neil
Good point. Mine's a GEMS engine.rtonder said:I've had some luck by raising the front end on both the 38a and the disco. Maybe the bosch engines trap more air as a result of the upper hose going over the alternator.