My no heat at idle has returned.........But I found my radiator is leaking, causing difficulty for the system to pressurize. Upper hose never really gets firm...plenty hot, not firm. Would this cause no heat at idle???/ Any inputs on this would help.

Just to recap.....I've got new head gaskets, thermostat, heater core, and a recent coolant flush. On a 97' 4.6L .


-Thanks guys.....I love this forum.alot help