I just watched a episode of Wheeler Dealers and they used a new waterless coolant. It seems to have a much higher boiling point and lower freezing point and it doesn't pressurize the system like water does so they could remove the radiator cap while the engine was hot and no spray. Also there is less corrosion on your engine because there is no water and it last a lifetime. I found it online from a place called Evans and it runs $43 a gallon. To replace your coolant you have to get all of the water out of your engine which it sounds like a simple flush won't do. Does anyone know a way to do this procedure?
As for getting all the water out, I would think hooking a Shopvac up in place of the radiator cap with the lower hose off would work. The massive air flow would make the water evaporate in around 30 minutes or so. Would work best if you drained the system when already hot.
Just an FYI, the radiator cap is what determines cooling system pressure, not the coolant itself.
$43 a gallon? No thanks, that's a lot of money to piss away if a radiator starts to leak or a hose blows.
A good coolant upgrade is stepping up to the newer Mopar HOAT or Zerex G-05. You get better protection for your aluminum components (radiator, water pump, aftermarket heater cores) and a longer service life for only about $4 more per gallon.
Not to mention I've noticed a 10* reduction in operating temps vs regular green, which I've confirmed via scan tool.
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It's not snake oil, it really does work. It's not actually new either, it's been around for the best part of 20 years.
If you filled a brand-new engine with it, you'd never see any cooling system corrosion ever. Whether it's worth spending the money to fill an old engine that's already suffering typical corrosion from running 50/50, though, is another matter.
Saw the Wheeler Dealers episode, and Jay Leno is converting his entire fleet over to it one car at a time. I have to flush my heater core and when I do, I will take the opportunity to switch over to waterless coolant.