Join Date: Dec 2002
Location: Doncaster, England
Bleeding V6 Cooling System
I have recently been suffering with a hot running v6 so I have now replaced the radiator and the thermostat. I also thoroughly cleaned out the aircon radiator to give good airflow through it. But it is still running a bit hotter than I would like and hotter than I remember it running when I first got it. Down the motorway at 80-90mph it is sitting at 95 but heading towards 100degC. It also tends to climb quite high if I do any hard acceleration even if it's just through the first three gears.
My main question relates to checking for any airlocks. I have released air from the top hose between the thermostat and radiator. I have released air from the radiator bleed screw on the opposite side to the top hose. I have released air from the bleed screw on top the steel pipe behind the rear cylinders. Is there any more bleed points I have missed or any special procedures I have not carried out. I thought there may be some bleed screws on the cylinder heads as the tops look higher than the coolant outlet but I just don't know. There is 4 allen headed screws on the cylinder heads (one in each corner in the middle of the vee) which I thought might be bleed screws but I am not touching them without knowing for sure what they are.
Any help would be very much appreciated as I am getting paranoid staring at the temp and I am driving like a grandad which is not good for an ALFA.
1999 156 2.5 V6 SP3 Veloce Proteo Red 17" 15 Spoke White Alfa Alloys Eibach Pro Kit Springs/Dampers Powerflow Stainless Exhaust