E vapo rust

[glenn in camino]

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?

[Dollar Bill]

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

[Chuck Sea/Tac]

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

[glenn in camino]

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?

[Big hammer]

Originally Posted by glenn in camino

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?

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

[TinCup]

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

[1931 flamingo]

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

[dahrens1]

Originally Posted by TinCup

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

Are you referring to the following? Looks interesting.

Thermocure by Evapo-Rust Cooling System Rust Remover and Flush

[CWPASADENA]

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.

[hardtimes]

Originally Posted by CWPASADENA

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.

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,.

.

[jwilliams81]

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

[TinCup]

Originally Posted by dahrens1

Are you referring to the following? Looks interesting.

Thermocure by Evapo-Rust Cooling System Rust Remover and Flush

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.

[hardtimes]

Originally Posted by jwilliams81

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

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 !

[nhusa]

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

[Bill in NJ]

So how many gallons do you put in ?

[guyatou]

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!

[glenn in camino]

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.

[Big hammer]

Keep everyone up-dated :-)

[nhusa]

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!

[guyatou]

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.

[glenn in camino]

Originally Posted by glenn in camino

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.

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.

[RonC]

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.

[Dollar Bill]

Originally Posted by glenn in camino

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.

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.

[nhusa]

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.

[mrtexas]

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.

[kelley's restoration]

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Originally Posted by Dollar Bill

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

[nhusa]

Originally Posted by mrtexas

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.

Where were you 24 hours ago.

I Already spent twenty bucks for Thermocure.

[Big hammer]

Originally Posted by glenn in camino

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.

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

[mrtexas]

Originally Posted by Big hammer

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

Dissolves the iron, the carbon remains and is black

[Dollar Bill]

Originally Posted by kelley's restoration

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

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

[nhusa]

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."

[Tom Wesenberg]

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

[Dollar Bill]

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

[wjeiler]

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

[RawhideKid]

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.

[wjeiler]

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?

[RawhideKid]

Originally Posted by wjeiler

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?

Good question, since you have the radiator off you can plug the lower hose and fill up the engine. Once you soak the engine, you can use a pressure washer or a steam cleaner or a pool/sump pump and flush from the top down. The trick is getting the crud broke loose to get it flushed out.

The reason I do not use vinegar in the engine is because even if you flush that out with baking soda, there can still be enough left to eat at the block, and it WILL continue to chew on the iron.

Remember to save the initial release of the evapo-rust as it can be used over and over again.

There have been plenty of discussions and pictures of items used to do this.

The last time I had the head off, I even went so far as to use a bore brush to sweep out the rear areas around #3 and #4 cylinders and use a magnet to pull out the crud. That proved worthwhile netting me a lot more rust flakes than I would have imagined.