As long as you flush with straight antifreeze you will be fine. The antifreeze with water may get slushy but it wont freeze solid enough to cause any damage. I think you are all good.

 

Do you use the pink RV antfreeze or the green stuff like Polar or Prestone?

 

if your mixing the green stuff with water you should be ok...if your doing the pink stuff i'd keep an eye on it....that stuff if you read the bottles is not supposed to be diluted....and if you read the bottles closer you will see the temps its rated for is for "bursting" of copper pipe....the pink stuff does get slushy in the low low temps...but it would take quite a bit for it to freeze solid enough for it to do any damage

 

The pink stuff in a cast iron block will rust the hell out of it!

 

opc1

 

opc1

lol op:

 

leave a light bulb on overnight in the engine compartment

 

The pink stuff in a cast iron block will rust the hell out of it!

I'm sure a little salt has nothing to do with it

 

I'm sure a little salt has nothing to do with it

What salt?

There is no salt above the bay bridge! This isn't New Jersey!:winker: :laugher:

 

What salt?

There is no salt above the bay bridge! This isn't New Jersey!:winker: :laugher:

OH .Then why is my boat so spotted up when returning to Delaware City at high tide
Don't answer , I know the answer :laugher: :laugher:

 

Mo, I wonder from time to time if I did everything right,since the temps have been sub- zero here. I talked to a friend of mine and he said a freeze plug blew out a week or so ago, I hope it`s alright.

I have been using the pink stuff for years no problems yet

 

YOUR OK...

Last week In Indian Lake NY and most areasaround it was -32 before the windchill.. Pink is used around here and has not been a problem...

 

I use the -50° pink for many years with no problems. I've been thru weeks where the temp never got above 20° during the day. 20 to 30 below nights is common around here.

FYI it was -12 this morning at 6:00. I find it easier to stay warm in the winter than to keep cool in the summer.

 

I use the -50° pink for many years with no problems. I've been thru weeks where the temp never got above 20° during the day. 20 to 30 below nights is common around here.

FYI it was -12 this morning at 6:00. I find it easier to stay warm in the winter than to keep cool in the summer.

And Now cold was it this morning?

 

The pink stuff in a cast iron block will rust the hell out of it!

The pink stuff has rust/corrosion protection.

 

The pink stuff has rust/corrosion protection.

Not the stuff I use in my fresh water system on the Formula!

My comment about rust was a result of my using the pink RV antifreeze in my old Libby back in the winter of 2003. When I fired it off in the spring of 2004 all kind of black chit flew out of the exhaust.

The winter of 2004 I used the antifreeze that had rust inhibitor in it, which I recall as being either green or blue. The spring of 2005, no black chit flew out of the exhausts. The antifreeze with rust inhibitor is much more expensive than the pink stuff.

I do use the pink stuff to run through the cooling system of the Formula but the 496s in that boat has closed cooling, so the pink stuff never comes in contact with the engine, just the heat exchangers.

 

The pink stuff sold by West Marine has corrosion protection. It states it right on the jug. They also sell pink stuff for your water side that does not have this protection.

 

The CAMCO brand, which is the most popular, offers corrosion protection, both the -50 and -100. If you use the green car stuff be very careful about where you drain that out. Dont let anyone see it happeneing...

 

The CAMCO brand, which is the most popular, offers corrosion protection, both the -50 and -100. If you use the green car stuff be very careful about where you drain that out. Dont let anyone see it happeneing...

The green stuff I referred to was bought at West Marine for marine use. It was not automobile antifreeze.

 

The CAMCO brand, which is the most popular, offers corrosion protection, both the -50 and -100. If you use the green car stuff be very careful about where you drain that out. Dont let anyone see it happening...

I use the green automotive.
I drain the blocks into the bilge and catch it with a drain pan as it runs out the drain in the hull.

Later I filter the drained "green" stuff and use it in my cars as needed. I have even used it the next year for winterizing. The green stuff does not really go bad if it is just sitting in the motor. It goes bad when it goes through the heat and cool cycle as it is used in your car/truck.

Well anyway the green stuff pours out green in the spring and is green when I put it back in the fall.

The green stuff is supposed to be diluted with water to work properly according to the instructions on the original containers. So if I have a bit of water left over in the block it actually helps some.

 

Mopower..............IF you are really concerned pull off the pressure gage on your manifold. IF it is frozen you might worry. If it is not, I do not feel like you could build up enough pressure in the block to do damage.

If the fluid under the pressure gage is frozen you might want to drain and refill with automotive antifreeze or some marine with -100 rating just to give you a warm and fuzzy.

As you know I personally sweat the cold weather damage. Since that is what started a good part of my problems

 

opie, i dont think thats a psi gauge...or he would be having problems blowing head gaskets i would suspect running it at 30psi!

 

opie, i dont think thats a psi gauge...or he would be having problems blowing head gaskets i would suspect running it at 30psi!

YEP U R right my bad.

I have a pressure gage in the same location and azz o u ME :laugher: assumed it was a pressure gage and did not look that close.

So Wally what is your take on my theory of auto antifreeze and recycling it a second year before dumping it into the neighbors swimming pool? :shocked:

 

And How cold was it this morning?

-14° at 6:00 AM..