Amazon: Amazon cooling system

[Sharpractice]

Thank you all once again for your informed and detailed responses. I mentioned that I had contacted Volvo Cars direct. I have now recieved a reply from their Heritage UK department and they confirm that the Volvo Antifreeze Product Code 31439721 is suitable for cars before 1990 i.e. the Amazon. I have therefore ordered the same. By the way, it is green in colour so should not be confused with the modern orange or other blue varieties. My next challenge is the headlining so that is a separate post!
Frank

[Can Cruiser]

Originally Posted by Ron Kwas

RiM;

Maybe the Evans hi glycol content product doesn't expand quite as much as the normal glycol/water mix, but if coolant was being lost out the overflow, I suggest your Alfa Rad was overfilled and did not have a sufficient volume for expansion...

Source: http://www.sw-em.com/Cooling_System.htm
...an expansion volume was necessary in Cooling Systems with no Expansion Tank for this very reason!

Cheers

What's the factory recommended pressure of the radiator cap? It's a 1800E, but imagine same as Amazon.

[Sharpractice]

Further to your helpful comments I checked with Volvo direct and they confirm that their proprietary antifreeze is suitable for classic cars - cast iron blocks - so that is what I will use.

[142 Guy]

Originally Posted by Can Cruiser

What's the factory recommended pressure of the radiator cap? It's a 1800E, but imagine same as Amazon.

1971 140 service manual says 10 psi / .7 Bar which is for the system with the external expansion tank. Check the service for your model year to confirm.

[Ron Kwas]

I agree with 142Guy...from '69 on, Cooling Sys pressure was increased to 0.7bar. See also: https://www.sw-em.com/Cooling_System...xpansion_Tanks

Cheers