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What's the problem with waterless coolant? It seems to tolerate much higher temperatures and it doesn't corrode the rad or water pump.
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No problem with it... but if the pump, rad and coolant system is well fettled it's just not needed imho. Oh another mod on my car is the Volvo header tank for the coolant system (it's on the thread I linked to)
Cheers,
Sam
Evans Waterless Coolant is more efficient than a water based coolant because it doesn't cavitate,
Instead it stays in contact with all surfaces all the time, thereby eliminating localised boiling.
It has been around for decades in North America, just look at all the vehicle manufacturers using it.
Slant four engines are prone to cavitation at the back of the engine (hence why head gaskets blow between 3 and 4).
Triumph (and Saab) changed water pump impellers to try and alleviate this, but that couldn't solve the problem alone because of the pump being
much higher than the lowest point of the cooling system.
Using a header tank does largely solve the problem, but the header tank needs really to be higher than the engine's highest point
for the low level indicator to be activated BEFORE the coolant level drops in the engine.
From the mid 70s Saabs used header tanks (as indeed did all manufacturers for this reason).
Slant four Dolomites give "normal" temperature readings if the coolant level drops below the temperature sender
(there are warnings about this in the workshop manuals). TR7s were equipped with header tanks....
Unlike water, EWC does not pressurise. This obviously reduces the strain on rubber components such as hoses.
Furthermore it does not corrode the engine's internals or clog the radiator.
For all Dolomites, the correct version to use is Powercool 180, not the classic versions.
The classic versions are not recommended for vehicles without a header or for engines with alloy content.
Ian.