E vapo rust
 

Yesterday afternoon I drained my cooling system and refilled it with EvapoRust.
I'd like to leave it in there for another whole day and night. Will that do any harm?

Re: E vapo rust
 

Leave it in as long as you want. It only attacks rust.

Re: E vapo rust
 

I've heard that heating it up helps it work?

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I'll drive it tomorrow to warm it up to operating temp before I drain it. Then I'll put the EvapoRust in the next car. How many times will it work?

Re: E vapo rust
 

Use it over and over until it quits working, about 300 # of rust!
Don't seal it in a container after opening or you will kill it! I drilled a hole in the lid to let it breathe.
I wouldn't get the temperature over about 120* please check with evaporust

Re: E vapo rust
 

Even better try their new product made just for this. It's available at WalMart.

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I WOULDN"T start or drive it UNTIL I had drained everything and flushed it out real good. You don't want any debris the Evaporust has loosened getting into your radiator ! ! JMO
Paul in CT

Re: E vapo rust
 

Are you referring to the following? Looks interesting.

Thermocure by Evapo-Rust Cooling System Rust Remover and Flush

Re: E vapo rust
 

I filled the cooling system of one of my cars with Evapo-Rust and drove the car around for a 2 days then I drained and flushed. Now everything is clean and rust free.

My experience.

Chris W.

Re: E vapo rust
 

X-2
Their advert says that warming the liguid improves its efficacy !
I had it in for about 5 days while driving around. Did a nice job.
It doesn't 'loosen' rust...it devours it,.

.

Re: E vapo rust
 

Do you put 2.5-3 gallons in your system? or is there a mix ratio to the water?
I might try this soon.

Re: E vapo rust
 

Yes several club members have used it with good results. You must flush it completely or the residue will foam when you put your coolant in.

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It seems that if your cooling system if FILLED with evaporust, that the results would be best. But, it is expensive ! So, yes I put a gallon in and added water to top off.
Now, don't get the idea that Model A owners are cheap, eh :) !

Re: E vapo rust
 

Thermocure - Evaporust? are they the same ?
If no which one is better to clean a radiator/block?

Re: E vapo rust
 

So how many gallons do you put in ?

Re: E vapo rust
 

Check out my thread here on this very topic (about to do an update in the next hour or so:

https://www.fordbarn.com/forum/showthread.php?t=226656

I have Thermocure, a product of Evaporust in my block currently (about 72 hours so far). It took about 1-1/4 gallons to fill the block to the top of the water outlet. The 32 oz bottle I bought is good for up to 3 gallons, so my dilution is about double strength. It was about $19 on Amazon with free shipping.

Warning! Science ahead:

Original Evaporust (and probably their Thermocure product) works because of an ionic process called "chelation" (pronounced key-LAY-shun). Basically it bonds electrically with the rust molecules (iron oxide) -- but doesn't bother raw iron, steel or other metals.

Molasses also removes rust through a similar chelation process. It works well, but it's as slow as... well, molasses. It might take 1-2 weeks where Evaporust will probably work in a few days. (And you wouldn't want to put molasses in an engine).

I've used regular Evaporust a lot on rusty parts in the past and have had good success, and so far I'm pleased with Thermocure.

Leaving rusty metal in either one of the products for too long won't hurt anything -- once all of the rust is dissolved, the chemical process stops. You do need to flush/rinse the metal thoroughly when you're done -- but don't throw away your used Evaporust. If you let the rust settle to the bottom, you can use it again several more times until it loses its effectiveness.

Note: I'm not a scientist, but I am always curious about how things work, so I looked this up some time ago.

Hope that helps!

Re: E vapo rust
 

Ok today it's been in there for 3 days and I've driven the car to warm in up. I'm going to drain it today and flush it out several times. Tomorrow we're going on a club tour and when I get home I'll flush it again. Hope it worked.

Re: E vapo rust
 

Keep everyone up-dated :-)

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HELP -- What is the difference between Evaporust and Thermocure by Evaporust?

There is a big difference in price. 32 oz for $9 and 32 oz for $20.

This is confusing. HELP!

Re: E vapo rust
 

I think Thermocure is regular Evaporust plus some detergents to break up grease and sludge in a cooling system. It probably has some sort of lubricant effect for water pumps, too.

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On the tour Friday the weather was hot and my Model A did boil over. I cleaned up the car and refilled the cooling system with Evaporust and think I'll leave it in for at least a month.

Re: E vapo rust
 

The evaporust will eat rust but won't unclogged a radiator clogged with old grease and sedimentation. Take it off the car and fill it with a lye solution for about 20 minutes and rinse out well (backflush with air and water). Repeat a second time for 20 minutes again. Don't leave it in to long.

Re: E vapo rust
 

A week is more than enough time for Evaporust to work. As RonC stated, I fear your radiator is clogged. If flushing doesn't work, the guaranteed solution for cleaning a radiator is rodding it out.

Re: E vapo rust
 

I put 32 oz of thermocure and 2 gallons of water in the radiator of my Model T today.
I noticed that the overflow tub turned copper instead of black in a few minutes. I warmed it up a couple times and will let it sit until next weekend.

Then I will drain the Model A radiator, put the mixture in it, and top it off with more water.
I figure I will need to leave it in for about a week.

Re: E vapo rust
 

Buy some Rust911, works out to $4/gallon vs Evaporust $30/gallon. Same stuff and works the same. You buy a gallon of concentrate that makes 16 gallons for $60 shipped.

Re: E vapo rust
 

not advised...
I left it in a can and it ate through the can and soaked into my bench
put it in plastic containers if possible
tk

Re: E vapo rust
 

Where were you 24 hours ago.

I Already spent twenty bucks for Thermocure.

Re: E vapo rust
 

Not sure how good Evaporust is as an engine coolant? Works good on rust, only rust, will not attack soild metal. It turns rust to a very fine, smaller than sand

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Dissolves the iron, the carbon remains and is black

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Could there have been rust inside the can? The PH is somewhat neutral and shouldn't attack clean metal.

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I asked Evaporust about a time limit on leaving Thermocure in my T with an aluminum water pump, old radiator and old cast iron block.

David Lewis responded and said "There is no issue with leaving Thermocure in the system for any length of time."

Re: E vapo rust
 

Someone mentioned using LYE in the radiator, but won't that eat the solder?

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Back in the day when you could get your radiator hot tanked, wasn't it caustic soda they used in the tank?

Re: E vapo rust
 

On this topic, I have a red, rusty sludge in my 30's radiator which I am assuming is a combination of grease/oil and rust. Would you recommend flushing first with a dish detergent/water mixture to cut the sludge, then the EvapoRust? Any other suggestions? Thanks a million

Re: E vapo rust
 

On this topic, I have a red, rusty sludge in my 30's radiator which I am assuming is a combination of grease/oil and rust. Would you recommend flushing first with a dish detergent/water mixture to cut the sludge, then the EvapoRust? Any other suggestions? Thanks a million

I have always used Dawn dish washing liquid first to cut the oil/grease, then let it soak a day or two with straight vinegar, just be sure when you dump the vinegar out the top! I lay mine on the top of the short wall next to the driveway.

Re: E vapo rust
 

So RawHideKid, you recommend removing the radiator for the flush? If so, how to do you typically address any of the sludge that may be in the water jacket?

Re: E vapo rust