Quote:
Originally Posted by GGR
you should clean your radiator first (I used a solution of Muriatic acid) and check if your fan clutch is good like Al says. Then, as already mentioned, pure water and water wetter is the best for cooling, though you may loose on the lubrication side.
When I crossed the US via the Death Valley in July 2009, my 3.5 had a 50/50 mixture of MB coolant and water and it was overheating. I swapped to pure water and water wetter and thingss improved dramatically. But my radiator must have been partially clogged by then.
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I am about to wash the radiator. The radiator is the culprit. I am pretty sure.
In the end the radiator is the bottle neck... clutch yes, it needs to work sure but won't do the job entirely as it sucks the air through the radiator and the radiator is cooling.. so downstream the radiator is key. Of course there might be some direct cooling at the block from the airstream by the visco fan but...this won't do it.
I just did flushes (radiator only)with alkali solution and acid...both slowly dissolve the debris inside...hopefully.
Maybe I can find muriatic acid somewhere. Then I'll also try this.