2006 Aveo- Does a replacement 20 psi radiator cap hurt the system if the original was 17 psi?
the important gig will be the thermostat...be sure a 295 fresh one has been installed...the cap pressure of 20 is just fine~
It appears that it is OEM pressures, I agree that 20 psi it high but engineers do crazy things these days, it possibly due to the fact that the cooling system is so small they didn't want it to boil out the coolant so they raised the pressures to make boiling harder to to do. see chart.
Looking for a Used Aveo in your area?
CarGurus has 2,050 nationwide Aveo listings starting at $1,900.
Search Chevrolet Aveo Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Aveo Experts