Date registered: Nov 2013
Vehicle: MY05 CLK55 AMG , MY05 CLK320,Former,C180 Kompressor,Jensen Healey,Ford Capri V6,Alfa GTV.
Location: Australia's East Coast
Mentioned: 2 Post(s)
Quoted: 292 Post(s)
Radiators can last longer than 12 years easily if not damaged or contaminated.
My cars are now 13 and 14 years old and are fine.
High speed rpm generates more heat,so you need a system that works 100%.
Lower speed could be ok on a system that works 70%.
I don't know,it depends on how bad the water pump is,if it pumps half the coolant it should then it could be ok at low speed but not at high speed.
A water pump can appear to be fine,but the only way to be sure is to remove it and inspect it for corrosion of the impeller fins.
A new radiator might solve your problem,or it might not.
Like Rory says it could also be the thermostat not opening properly. Most would try that first.
Last edited by Benzyle; 09-07-2017 at 09:22 PM.