Rusty coolant

Rusty coolant

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datsun240z

Original Poster:

37 posts

277 months

Saturday 20th September 2014
quotequote all
Dear S friends,
I'm cleaning the entire coolant system on my 280s as the coolant was very rusty. It seems that the car has been sitting at least 2 years before I bought it.
The inside of the swirl pot and the 2 coolant tubes (steel) are very rusty.
Is there a good way to clean and stop that rust? I'm worried about rust flakes going all over the cooling sytem and the water pump...
Cheers
Greg
from Brussels

datsun240z

Original Poster:

37 posts

277 months

Monday 6th October 2014
quotequote all
I have used phosphoric acid to convert and stop that rust in the pipes and swirl tank. The results are awesome.
I have now refilled the system with water and Wynns coolant flush.
What's the best way now to empty this mix and to replace it with a G12 coolant ? Is there a drain somewhere on the engine block ? (2800cc cologne)
Cheers !