Right if im sat at lights and my temp guage shows 90 then my heaters will go cold? then as soon as i drive off the temp goes slightly warmer then comes back down to 90 then heaters work again :/ but sometimes the heater dont work at all until the engine is revved over 2750rpm ish ? its baffling me because i put new metal pipes from heater matrix to coolant hoses (to stop the leak), then new water pump and thermostat.. any help :/ ???!?!?! someone said cooling system needs bled so i ask how and they say its a self bleed system ..

Edited 9 February, 201313 yr by Dan93VRS

??

Sounds like an air lock/bleed issue, it is 'usually' a self bleeding system but with the heaters on max squeezing the larger flexible heater pipes may force the air lock through, being on a hill can also help

Sounds like an air lock/bleed issue, it is 'usually' a self bleeding system but with the heaters on max squeezing the larger flexible heater pipes may force the air lock through, being on a hill can also help

Well i just checked the bottom rad hose and its stone cold? maybe a blocked rad or something?