AntiFreeze

[xlr8nflorida]

If you are running 50/50 mix, what is the protection level?

I'm getting +5 degrees on my 93 LT1.

Does that sound right? I'm thinking it should be -30 or so.

[Dynomite]

Originally Posted by xlr8nflorida

If you are running 50/50 mix, what is the protection level?

I'm getting +5 degrees on my 93 LT1.

Does that sound right? I'm thinking it should be -30 or so.

-30 for South Dakota.....not for Florida
5 deg should be fine for you and definitely more protection level than you need.
You would prolly use antifreeze more for rust protection than for freezing protection

[xlr8nflorida]

Originally Posted by Dynomite

-30 for South Dakota.....not for Florida
5 deg should be fine for you and definitely more protection level than you need.
You would prolly use antifreeze more for rust protection than for freezing protection

I agree and where I am now with the car its going down to 20.

I'm just wondering if the antifreeze lost some of its Zing. I'm thinking its time to change it anyway and give it some fresh mix.

[Dynomite]

Originally Posted by xlr8nflorida

I agree and where I am now with the car its going down to 20.

I'm just wondering if the antifreeze lost some of its Zing. I'm thinking its time to change it anyway and give it some fresh mix.

If you change out antifreeze...here are three threads for you

http://www.zr1netregistry.com/forum/...+refill+method

http://www.zr1netregistry.com/forum/...ead.php?t=3213

http://www.zr1netregistry.com/forum/...ad.php?t=10777

[xlr8nflorida]

Originally Posted by Dynomite

If you change out antifreeze...here are three threads for you

http://www.zr1netregistry.com/forum/...+refill+method

http://www.zr1netregistry.com/forum/...ead.php?t=3213

http://www.zr1netregistry.com/forum/...ad.php?t=10777

Thanks, I now have a headache

Can someone give me the cliffs of the acceptable antifreeze?

For example, I can go to NAPA and get the green stuff, what is the part # and I need 2 jugs right?

[Dynomite]

Originally Posted by xlr8nflorida

If you are running 50/50 mix, what is the protection level?

I'm getting +5 degrees on my 93 LT1.

Does that sound right? I'm thinking it should be -30 or so.

You need to check specific gravity of coolant using an inexpensive Floating Ball Tester (Hydrometer) you can get at any auto parts store. You suck up some coolant (cold) directly from radiator or coolant overflow system into the clear tube and observe the number of floating balls to determine the degree of protection. The accuracy is within 8 to 10 deg.

[tomtom72]

Jim,

sorry to be blunt, but toss the coolant. It's shot if you are sure that you did a 50/50 mix the last time it was changed out! Unless you were adding along the way using just water and not a 50/50 mix for top off's?

You do have a fav local chevy store that you use regularly for parts? Get them to order the GM stuff, 4 gallons per case, they should be okay with a one case order. You will have enough stock to do two flush & refills which will get you 4 yrs down the road. GM p/n = 12378560

Sorry I can't help with the NAPA p/n's.


Tom

[Hammer]

Originally Posted by xlr8nflorida

Thanks, I now have a headache

Can someone give me the cliffs of the acceptable antifreeze?

For example, I can go to NAPA and get the green stuff, what is the part # and I need 2 jugs right?

I don't have a part number, but the labeling identifies the 1825M spec and also specifies there are silicates in the antifreeze. It's a NAPA brand and they usually have jugs of it available. Mine is in a blue jug.

[Hammer]

Originally Posted by Dynomite

Speaking of jugs

You don't miss a thing do you?

[xlr8nflorida]

Originally Posted by Hammer

You don't miss a thing do you?

Are you guys pulling the freeze plugs and draining the block and then refilling?