Radiator Overflow Always Empty.

[stehas]

It isnt a head gasket as im running a 3 layer metal one, and the head has been fully rebuilt less than 15k kms ago.

Water temp is always 80-85 deg. Only goes up to 90 on a hot day. No leaks anywhere in system.

Only thing left is the cap...which i havent found a replacement yet, as repco tried to sell me something that was different to the one on my car, even after i pointed out it was different....damn ignorant sales jerks think they know everything

[stehas]

I have been having the same problem with my car and after alot of messing about changing the radiator cap and thermostat i decided to take the radiator off and get it flow tested to find it is partly blocked so ive just left the thermostat out untill i can find a new radiator or get enough time off work to get mine recored

[GRK:32R]

could even be air in the cooloing system.... wasnt bled properly

[Neil]

I think I can tackle this little problem but you have to do what you are told.

1/ Get rid of that stupid push button radiator cap. I use a Mazda 121 cap, it's 1.1 bar (standard is .9) Nismo and the like are 1.3 bar.

2/ Fill the overflow bottle to the top make (max) on the bottle while the car is cold. Now go for a drive. After the drive check No 3. If this turns out good (make it a every long look) go to No 4.

3/ I would assume you are running quality coolant. If you have any leaks it will show up with a white dry residue under one of your water connectors,,,,meaning hoses, joints and even from the water pump.

4/ Get the system pressure tested, if still nothing

5/ Get a mechanic to leak test your engine telling him what you have done so far and hope it's not a head gasket. Just because everything is new is no garantee it's all good.

Hope that helps.

Neil.