Having a termo fitted gets the engine up to operating temp quickly. Running the engine hard before it has warmed up will lead to engine damage. This wont be a concern on a hot days but most certainly will be on a cold one.
I'd change the thermo straight away and check the water pump. Refill with toyota red and if its still overheating, its off for a leakdown/ hydrocarbon test to check the head.
Fri, 17 September 2004 00:33
