**thanks**Anyone have a 5.7 litre chevy truck motor in a full size pickup??

[bigcfromcinci]

This is really off-topic
I'm changing antifreeze and can't find my manual.Was wondering what the antifreeze to water ratio is suppose to be

Thanks peeps

 

[Ladies Man]

should be 50/50

i've never heard it different

 

[Pacfanweb]

I have a 5.7 in my Tahoe. I use 50/50.

BTW, if you are using the orange coolant, some techs at the Chevy dealer advised to use distilled, not tap water with it. I haven't researched it any further, but the guys that work on them every day usually know what they're talking about.

 

[Ladies Man]

guys that work on them every day also want to keep working on them every day
think about that alittle too when getting some advice from dealers

 

[d33pt]

you should ALWAYS use distilled ....you dont want mineral buildup in your cooling system do you?

 

[Viperoni]

If you live in colder climates (Canada ) you should use 70/30 (antifreeze/water)
Distilled of course.

 

[mastertech01]

A dealership technician would likely be the last to want to sabotage your vehicle. We have to stand behind our work for at least a year. We have enough work just trying to fix everything that the backyard/independent shops butcher up. Maybe you have had a bad experience with a dealership that has poorly trained technicians but the overall majority of repairs are fixed right the first time due to our risk to have to fix it again for free. To me thats a no brainer.

 

[Pacfanweb]

<<guys that work on them every day also want to keep working on them every day
think about that alittle too when getting some advice from dealers >>

Spoken like someone who TRULY doesn't know anything about cars.


Edit: Not to mention that I was there buying a part for my car, and oh by the way......I am a svc manager at another dealership...the tech that told me that KNEW he had no prayer of ever working on my truck. It was just two professionals exhanging info.

 

[bigcfromcinci]

Guys,
thanks alot,I went with 60/40 :Q
Should be suffiiecent<sp>
It's the red looking coolant for newer vehicles.Dexcool I believe.Again thanks

There saying this stuff is good for 150,000 miles!!WOW

Prestone DEXCOOL

 

[Transition]

<< If you live in colder climates (Canada ) you should use 70/30 (antifreeze/water)
Distilled of course. >>



I think your mis-informed my friend. Water has better cooling properties then antifreeze. If you add 70% antifreeze your decreasing the effectiveness of your cooling system. You should always do 50/50. If you want better cooling use some Redline Water Wetter.

 

[LAUST]

Everyone should get rid of the Green Anti-Freeze and trade it for the GM Dexcool, you have to flush the Old Anti-Freeze all out tho, no mixing the 2. but it lasts longer and is also better for your waterpump, the old green has chemicals in it that will eat the seals on a water pump.

 

[bigcfromcinci]

Laust,
Found this while browsing the net on dexcool:

I would not use Dexcool® in a vehicle that did not come from the factory with Dexcool® in the cooling system. It would be very difficult, if not impossible, to flush out all the conventional anti-freeze coolant from the cooling system of an older vehicle, and any conventional anti-freeze would contaminate the Dexcool®.

Compared to old-fashioned phosphated antifreeze, Dexcool® may be more stable and improve water pump life. Evaluations of the two technologies to compare their respective service lives have found them comparable. In fact, a Ford Motor Company study concluded that organic acid coolants do not offer any significant advantages for the consumer over current North American coolants. In a modern car with a well-maintained cooling system, current North American and OEM factory fill coolant corrosion protection can be extended far beyond previous expectations.

So the bottom line is this, if your car came from the factory with Dexcool®, use Dexcool® for replacement or to top off. If your car came from the factory with standard "green" antifreeze, use that for replacement or to toping off. Case in point, Dexcool® has been known to cause head gasket and water pump failure on some Ford OHC V-8's.

Thanks again,I'm outta here

 

[LAUST]

I think Ford is BS'ing myself, Any way to make the competition look bad.

 

[bigcfromcinci]

I agree

<< Any way to make the competition look bad >>

 

[tgillitzr]

Ford would NEVER do that....

 

[Pacfanweb]

<<I think your mis-informed my friend. Water has better cooling properties then antifreeze. If you add 70% antifreeze your decreasing the effectiveness of your cooling system. >>

Exactly, that's why if you lived in COLDER climates, like the poster you responded to, you'd WANT to reduce the effectiveness of the cooling system, so it would heat better, and be more resistant to freezing up.

Laust, Ford does have a service message that says NOT to change over from green to Dexcool, if your car didn't come with Dexcool in the first place. If you have a Ford, chances are it didn't. Very few do.

Overall, everything I've heard about Dexcool says it should be good. My Tahoe owners manual says not to change it for 150,000 miles. I'll never let it go that far, but it's nice to know I could. I do know that Dexcool doesn't have the silicates that green coolant does, they are what eats up water pumps.

What is interesting is that numerous Chevy techs say the first thing they do is flush the Dexcool out of their cars and replace with green coolant. Seems that the see a lot of heater core and other problems up near 100k miles. I'll have to check into that some more, meanwhile I'm sticking with Dexcool.

 

[SidewaysN2second]

60/40 water antifreeze is good for performance

 

[Pacfanweb]

<<Case in point, Dexcool® has been known to cause head gasket and water pump failure on some Ford OHC V-8's.>>

The only OHC Ford V8 there is is the 4.6 and 5.4's. They have a pretty significant problem with headgaskets leaking with green coolant, much less with orange.