Engine rust

[exoilfld]

On 2 of my A’s the rust inside the engine is so bad that even after flushing out, the water soon turns to a thick rust color. Anyone have any ideas on how to fix this?

[mcgarrett]

My first thought would be your water source. Does this happen with a 50/50 mixture of antifreeze?

[exoilfld]

I have tried both ways. Does not seem to matter.

[1930artdeco]

Maybe clean and dry it and then add a coating like they do in the crankcase?

[exoilfld]

Coating of what? Also, even after draining the engine, there is still a little left in the lower part of the block. I was wondering if there is an additive to add that would coat ?

[mcgarrett]

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Maybe try an anti-corrosion coolant treatment product like Purple Ice or something similar...

https://royalpurpledirect.com/purple...lant-additive/

Perhaps try using distilled water and 2 bottles of coolant additive like the one above to see if there is any change. It's worth a try and not that expensive.

[Big hammer]

Flushed out with??????? I would first try Prestone super flush made for cooling systems available at your local parts stores. If it still doesn’t work, evaporust or rust 911 or thermocure next! Follow the manufacturer’s instructions!!!!!

[noboD]

Do a PH test on what is in the block. Then adjust accordingly, either acid or base.

[exoilfld]

Thanks. I will try them until I find one that works.

[MilwaukeeMike]

One cheap way to de-gunk an engine is to run distilled water in it. Fill it and run it for a little while. Maybe a day or two. Drain and repeat. The water is mineral free and helps leach out a lot of junk. I used a couple cases until it stayed clear. Then change it with your 50/50 mix. Don't leave distilled water in there for long.

[Gene F]

Anyone ever use baking soda?

[noboD]

No, but I have used vinegar. It works great on my tractor which 4 cylinder. I fill it and mow maybe 8 hours with it. Lots of flush.

[JayJay]

You might also try power flushing the engine. I made a couple of adapters that connect to the water pump outlet and the lower inlet using pvc pipe fittings, then attached a garden hose connector. Connect to a hose and let ‘er rip. It was amazing how many large chunks and flakes of crud came out. Flush it both ways, several times. Whatever rust converter you use will be far more effective if it doesn’t have to work on chunks and can concentrate on the stuff that doesn’t come out easily. Obviously, don’t connect back to the radiator until your flush is particle-free.

[JayJay]

Originally Posted by 1930artdeco

Maybe clean and dry it and then add a coating like they do in the crankcase?

I think a coating like used in crankcases would interfere with heat transfer, and would be a bad idea. The stuff in crankcases is used to enhance oil drainage, not prevent rust.

[updraught]

I'd do the Evapo Rust thingy.

https://www.evapo-rust.com/thermocur...-rust-remover/

https://www.evapo-rust.com.au/Downlo...0low%20res.pdf

https://forums.aaca.org/topic/333382...-rust-remover/


Interestingly they also have one called Aluminate that removes aluminium oxide.

[ronn]

flushed my roadster 3x with a garden hose and car running. 3rd time was the charm. tons of gunk/rust came out. now have fresh antifreeze and all is good.

sometimes you need to repeat the process several times. I also use the vinegar and let it sit for 6 weeks, starting the car up once a week for about 15 minutes.

[Chris Haynes]

I flushed my cooling system with water. Drained and refilled with RUST911. Left it in for 24 hours. I drove the car with this mix in it. When I drained it the water was black. l flushed it and refilled with RUST911 again. The next day when I drained the water was light grey. Flush and refilled it again. When I drained it the next day the water was clear. I removed the hoses and I could see the inside of the engine and radiator was sparkling clean. No rust flakes. Then I spent the big bucks for Evans Waterless Coolant. No Water = No Rust.
https://www.amazon.com/Rust911-16-ga...7-857e17e03685

[Bruce of MN]

Flushing adapters: https://www.fordbarn.com/forum/showt...er#post1809251

[CWPASADENA]

Originally Posted by Chris Haynes

I flushed my cooling system with water. Drained and refilled with RUST911. Left it in for 24 hours. I drove the car with this mix in it. When I drained it the water was black. l flushed it and refilled with RUST911 again. The next day when I drained the water was light grey. Flush and refilled it again. When I drained it the next day the water was clear. I removed the hoses and I could see the inside of the engine and radiator was sparkling clean. No rust flakes. Then I spent the big bucks for Evans Waterless Coolant. No Water = No Rust.
https://www.amazon.com/Rust911-16-ga...7-857e17e03685

I agree and have used this process on several cars with very good success. Just flushing will not get rid of all the rust. Unless you get rid of the rust the problem will still be there.

Chris W.

[ronn]

my flushing adaptors tend to be duct tape........

yes Im "thrifty" or as some say, cheap.