Correct Radiator Cap

[Purbeckfossil]

I have a 1275cc engine in my convertible and would like to know what is the correct PSI radiator cap I should fit.

Thanks

[Neil MG]

If you have the standard radiator, I would use the standard 4 lb cap.

Before moving to a higher pressure system I would consider an expansion tank (pressurised with an un-pressurised rad cap) or a coolant recovery tank (same idea but vice versa on the caps)

[aupickup]

i used an 8 in mine and it was fine