AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
It shouldn't boil if the fan is coming on.
Thermostat usually lets hot water into the radiatore at around 86C (depending on model etc.) and the fan comes on around 92C.
On the other hand, the system is self-purging so any air in the system would get cycled back out of the system into the reservoir.
Also, coolant expands when it's hot so you may be getting a "surge" of fluid into the reservoir and that looks like it's boiling when it isn't.
Let the beast cool right down (overnight is best).
Bleed the radiator - loosen the bleed screw that you'll find on the inside of one of the radiator "shoulder" panels. Don't take it right out... just unscrew it until air rushes out. When you see coolant, tighten it up again.
Top up the reservoir to a teeeeny bit under MAX. Tighten up the cap.
Go for a drive round and round the block. See what the temperrature does as the car gets hot. Keep going until the thermostat has opened and the car has been up to 86-88 or even 90 a few times. It should never creep over 92C without the fan coming on.
Get home.. let it idle until the fan comes on (around 92C). Make sure that cools the car down to 88C or thereabouts and then turns off.
Let the beast cool down... then next day repeat. Ideally you want no air coming out of the rad' today (a tiny bit might be okay) and the coolant level should be where it was yesterday after you topped it up. The car should run without any temperature dramas.
If it all looks good, it sounds sorted... use the car as normal but do the "bleed the rad'" part again next weekend. No air should come out at all now, just coolant.
No bullets for Chaingun..