Rb30 Overheating

[r34gttneo]

hey guys,

lately my rb30 in my 31 has been over heating, i have been doing some research on here with others that have had overheating problems, but none of them have helped me so heres what i have done.

(car got to120degrees last night) but still drives fine

i have put a new radiator in($330 from Natrad), got the block flushed, change and removed thermostat, the clutch fan is fine, i have change with temp sender unit(thought it might be faulty), put a new temp gauge in. the only other thing i can think of is if the water pump has shit it self. is there a way to test the water pump is working fine.

any help would be much appreciated

Scott

[StevenCJR31]

Can only suggest that you open the radiator cap when engine is up to temp and see if the coolant is moving thru the top tank

[mad082]

the 2 causes of overheating that you haven't yet done (although you have considered 1 of them) is a shot water pump, or a blown head gasket. if you are losing coolant then it will be the head gasket, but if you aren't then it is most likely fine.

[r34gttneo]

i have checked oil there is no water in it and there is no bubbles when i take the radiator cap off, and I'm not loosing any water,

[StevenCJR31]

i have checked oil there is no water in it and there is no bubbles when i take the radiator cap off, and I'm not loosing any water,

and you have checked if there is coolant moving across the top tank?it will overheat if the coolant isnt moving(but not too fast)

[gotRICE?]

Is this an R31 thing? None of the cars i have ever owned can you see the water moving across the top tank. It just sit there and pulsates. lol

[StevenCJR31]

Is this an R31 thing? None of the cars i have ever owned can you see the water moving across the top tank. It just sit there and pulsates. lol

wether it pulsates or moves (whatever the terminology)if the water isnt circulating then the radiator wont remove heat from the coolant