Best antifreeze for 455 with aluminum heads and intake

Hello,

I’m hoping to obtain updated answers, car is driven on the street with the occasional burn out. Thoughts on the best antifreeze to use? Thank you in advance.

 

Conventional antifreeze is fine for those, it’s when you switch to a all aluminum radiator that you’ll want the properties found in the Orange coolants.

 

The water is more important that the anti-freeze.. used distilled water only..

JW

 

I agree. I changed to 20% anti-freeze 80% distilled water and Water Wetter back in February and my car now runs about 10 degrees cooler and also doesn't get as hot when idling for extended periods. (Like at long traffic lights).

 

Thank you everybody for the information, will try a mixture of the 20%, orange, 80%, distilled and water wetter.

 

Make sure you read the label...some containers already come pre-mixed with water.

Devon

 

Correct, I’m planning to buy the concentrated bottle.

 

Just make sure you mix the right concentration based on the climate you are in. I use 50:50 since it occasionally gets below zero F here.

 

Thank you, planning on doing that. Although I live in an area that can get pretty cold winters, the car would be driven late spring until early fall and garage during the winter.

 

Yes and no. The water facilitates heat transfer. (Nucleatic boiling) But, the coolant has additives to prevent corrosion. Also the ethylene glycol will raise the boiling point and provide freeze protection.

I agree that the coolants are all more or less the same. If you are starting with a new system (rebuilt engine and what not) pick what you want. If you have an existing system, do not change coolants. Specifically do not mix the traditional green (silicated) with the OAT variants (Dex-cool is one). The additive packages do not mix well.

 

Would you suggest a bottle of green that’s premixed 50/50 or mixing 20% concentrate with 80% distilled and Wetter Water?

 

Marcus, we're on the verge of overthinking this.

What's your coldest night in the last twenty years? We can go from there with coolant mix advice.

The hot part we can figure out later.

Devon

 

Here's a chart you can use as a guidline for how much water vs anti-freeze to use for freeze protection during winter. As for the boiling point, keep in mind that the water is under pressure in the radiator so the boiling points in the chart do not consider the pressure.

 

Larry, what's your take on Evans waterless coolant?

I switched over to Evans waterless coolant and your recommended Griffin aluminum radiator and these changes eliminated my high heat temperature issue.
Have you ever tired it or know of anybody who did? What did they say about it?
It’s even approved by the NHRA. Vet

 

Without question if you have the wallet for it theEvans is the best!

 

This is terrific information, looks like I’ll be right around 80%, thank you all.

 

Not to get off topic but what do some of you use for an anode to prevent electrolysis ?