I noticed that the coolant level was low; almost to the minimum line in the exterior tank. Ran by the jeep dealer because I thought I would need to add 50/50 coolant and water, but the service desk just toldme to add a little water. He said that "that's all the would do". Does this souls right to you guys? Thanks for the help.

 

When mine was just a little low I added Distilled water to the tank. Never been near the low mark but if I was I would defiantly add the 50/50 mix. Also remember these beasts use the HOAT type antifreeze which is hard to find and not your basic green stuff.

From the Owners Manual
CAUTION!
Mixing of antifreeze/coolant other than the specified
HOAT antifreeze/coolant may result in decreased
corrosion protection and engine damage.
If a non-HOAT antifreeze/coolant is introduced
into the cooling system in an emergency, it should
be replaced with the specified antifreeze/coolant
as soon as possible.
• Do not use plain water alone or alcohol base
antifreeze/coolant products. Do not use additional
rust inhibitors or antirust products, as they may
not be compatible with the antifreeze/coolant and
may plug the radiator.
• This vehicle has not been designed for use with
Propylene Glycol based antifreeze/coolant. Use of
Propylene Glycol base antifreeze/coolant is not
recommended

 

Throw RP Coolant additive in with some water an youll be better than good.

 

Service guy told me just regular tap water. Figures. I thought it should be a 50/50 mix.

 

If you only add water every time it is low eventually you will dilute the coolant enough to make a difference in the freezing level and the boiling point of the coolant. I would recommend adding 50/50 of the proper mixture.

My $0.02

Officially an Enthusiast!

 

Like "knotaddicted" said, 50-50. If you mix it yourself, use distilled water- NOT "tap water" Tap water has minerals in ti that will plate out on the radiator passages and eventually reduce cooling ability.

 

How mineral heavy is your municipal tap water? When I was one the west slope and had municipal well water, I would not for a second have thought about using tap water in the radiator (at least after I had lived there a while). That water was HARD. The dishwasher in 1 year, grew about 1/2" around the heating coil (so yeah, that means a 1" salt tube). Where I grew up the water has a very low mineral content. The municipal supply goes from snow, to a granite lake, to plastic/steel/ceramic pipe. I am sure it has some mineral in it - but not enough to worry about, even if it sits in there for 100k miles.

But you don't want to do that too much. Why not just get some HOAT coolant? You can order it from Amazon if all else fails in your search.

Zerex ZXGO51 G-05 Antifreeze

 

no water in mine just coolant... G.M. product...
not dear $5.55 a litre...pop that in...no worries...

 

so I went and added prestone 50/50 blend to mine....It says right on the jug "mixes with any color antifreeze and any make and model vehicle" I'm assuming this is ok...right?

 

I hope there is water in yours! Proper antifreeze/water mix is important, and is usually a 50/50 mix of antifreeze and distilled water = approximately 34 degrees below zero protection, plus summer boil-over protection.

You can actually go up to 70% antifreeze & 30% water, for maximum freeze protection, but not more.

If you go over 70% antifreeze, your freeze protection actually gets worse! 100% antifreeze has poor freeze protection.

The proper antifreeze for your Jeep is ONLY Mopar brand, or Zerex G-05 antifreeze, which is a HOAT type coolant.

http://www.valvoline.com/products/br.../antifreeze/42

Proper coolant/water ratios are on the back of the jug. DO NOT use any "universal type" antifreeze.

Use caution when purchasing antifreeze. Some jugs are pre-mixed with 50/50 antifreeze and water. DO NOT add water to those. Other jugs are 100% antifreeze - then mix accordingly.

Mabar