Right mix???

[jvazquez53]

I flushed the cooling system on my 60 today, also I just found out that there's an o-ring on top of the thermostat and I put none,:whoops: so back to disassemble the thermo housing and install the o-ring!! Now I put two gallons of antifreeze (called coolant here) and tow gallons of water. Is that a correct mix?

 

[GLTHFJ60]

It's supposed to be 50% antifreeze and 50% distilled water. I've been told that you can run less and even sometimes no antifreeze in warmer climates, such as yours

 

[CruisinFJ60]

yes its correct run a 50 / 50 mix.

the antifreeze helps with cooling in warmer climates as well as keeping it from freezing in cooler climates.

antifreeze is essential and cools much better with it than just water alone.

 

[DirtyLittleSecret]

also cuts down on rusty coolant systems

 

[jvazquez53]

X2 on the use of antifreeze. Sometimes we run the vehicles without thermostats but running with no antifreeze is not a good idea (corrosion).

 

[jvazquez53]

Trouble...

As soon as I started the truck, went out for a test drive, noticed the temp gauge rising, too much for my taste. I checked the thermostat (brand new) placed according to the manual, only thing I missed was the top gasket that goes on top of the thermostat. Mixed 50-50. I noticed the top hose holding a lot of pressure. What could be wrong??

 

[cando john]

my temp gauge runs on the high side also but the extra temp gauge on my rad shows 190 i'm gessing the stock gauge or sending unit are wrong the motor runs to good to be running to hot just my 2cents

 

[2mbb]

The pressure on the hose is a function not only of the temperature but also of the specification and operation of the radiator cap. I think the OEM cap is supposed to open at 13 or 15 psig. If the cap is new or working properly, then your hose really can not over pressurize. If you haven't replaced your radiator cap in a while, it might be time to do it.

After replacing the radiator fluid, it is difficult to get all the air out of the system. Often a pocket of air collects around the temperature sensor creating a temperature reading that is high. Do a search for "radiator burb". You have to point the front of your truck up a steep hill to get the radiator to be the high point, then run the engine and hopefully push the pocket of air out.

 

[CruisinFJ60]

man my oil pressure gauge hasnt read that high in a while... LOL

 

[ntsqd]

Coolant is not better at cooling than pure water. It is better at protecting against corrosion and mixtures have a slightly higher boiling point.

The ability of a liquid to conduct heat is called the Specific Heat. Water is the standard by which all others are judged. It has a specific heat of 1.00
Ethylene Glycol (common coolant) = 0.57
Propylene Glycol ("enviro-safe" coolant) = 0.59
A 50/50 mix of Ethylene and water = 0.85
So a 50/50 mix is only ~85% as good at conducting heat as is pure water.

While the Glycols boil at higher temperatures than does water, they require less energy to raise their temperature, so the net result is a loss in cooling ability.

Refs:
Ethylene Glycol Heat-Transfer Fluid
Stewart Components - High Performance Automotive Cooling
Cooling Faq, Part 2: Coolants - Better Living Through Chemistry

Use as little coolant as needed to achieve the freezing point and corrosion protection desired.

Also note that most tap water has impurities in it. Some areas are better than others. If the water tastes good, it probably has too many suspended minerals in it. In my area the water has a lot of calcium in it. I use deionized water to fill coolant systems.

 

[60LCConvert]

When I picked up my 60 and took all the parts out of the back seat and put them where they belonged it also ran hot, seemed to just creep up when I sat still for any length of time. I changed everything that might be old or worn, in the end a dirty radiator (inside and out) was the culprit. When you fill it the purchase of a flush kit is nice, even if you dont flush the radiator if you install the flush components you put the hose connection up high by the fire wall heater hose and it makes a great place to burp your system. can sit all day in Arizona summer heat and never get passed mid way