Sounds Good, Hydie. Thanks for confirming the concern about the heat and those valves - maybe if someone is having lots of trouble with a cooling system and will be doing frequent bleeds can use those, and be willing to experiment. I would say that for most of us, bleed it once, and done till you have to the next water pump *chuckles*. It isn't like you go bleeding the air weekly.
I've got _A_ newer coolant in my 3.5 after the 3.3->3,5 conversion, but I'm not sure _WHAT_ newer coolant it is... is there only one newer coolant?
As for the Prestone water pump lube and anti-rust, it is in a little white bottle with a green cap and yellow label. It is 11 oz, with a green arrow that says Prestone on it. It is described as a cooling system Anti Rust plus Water Pump Lubricant. Would this be BAD to mix with HOAT? I know that Dan has talked about using a water pump lube with his new water pump installs and what not, just dont know if this is the stuff or not.
There is only one new style of coolant for Chysler's. Which is HOAT of the older style green antifreeze. As for the Prestone water pump lube, I'd only add it if you are using the green antifreeze and not put anything in with HOAT coolant.
Here's some info the different typs of coolant:
There are essentially three basic types of antifreeze:
Traditional North American GREEN antifreeze
, the original universal formula that everybody used until the introduction of
today is extended-life coolants. The fast-acting silicate and phosphate corrosion inhibitors provide quick protection for bare
iron and aluminum surfaces, and have a proven track record of providing trouble-free service in virtually any vehicle
application (domestic, Asian or European), assuming the chemistry is correct. For example, OAT coolants should not be
used in a vehicle that specifies the use of a hybrid OAT coolant. Again, always defer to the owners manual. But the shortlived
nature of the corrosion inhibitors means this type of coolant should be changed every two to three years or 30,000
miles (though some products now claim a service interval of up to 50,000 miles with improved chemistry).
OAT-based extended-life coolants.
OAT stands for Organic Acid Technology, and includes such ingredients as
sebacate, 2-ethylhexanoic acid (2-EHA) and other organic acids, but no silicates or phosphates (except in the case of
pink extended-life coolant, which adds a dose of phosphate to its extended-life OAT-based antifreeze). OAT-based
coolants are usually (but not always) dyed a different color to distinguish them from traditional North American green
antifreeze. GM OAT-based Dex-Cool is orange. Volkswagen/Audi uses a similar product that is dyed pink. But has
an extended-life OAT coolant that is dyed dark green and does not contain 2-EHA.
The corrosion inhibitors in OAT coolants are slower acting but much longer-lived than those in traditional North American
green coolants. Consequently, OAT coolants typically have a recommended service life of five years or 150,000 miles.
OAT corrosion inhibitors provide excellent long-term protection for aluminum and cast iron, but may not be the best choice
for older cooling systems that have copper/brass radiators and heater cores. It depends on the formula.
Hybrid OAT coolants, also known as G-05
. This formulation also uses organic acids, but not 2-EHA (different organic
acids are used). Hybrid OAT coolants add some silicate to provide quick-acting protection for aluminum surfaces. Silicate
also helps repair surface erosion caused by cavitation in the water . Hybrid OAT coolants are currently used by many
European vehicle manufacturers as well as Ford and Chrysler.
Note: OEM color HOAT coolant from Chrysler is Orange in color like Dex-Cool from GM.