Re: Evapo-Rust

Posted by Mr.D On 2024/7/19 23:13:21

I had a similar problem with my 1940 110 6 cylinder. I called the Evapo-rust help line and they assured me that it would not hurt the engine as the only thing that it destroys is rust. I drained and flushed the engine several times then: pulled the thermostat housing from the top of the head and poured in the Evapo-Rust into the opening right up to 1/4' from the top of the head. I allowed it to sit for six weeks.I flushed and filled again and added 50/50 Prestone and DISTILLED water.That seamed to do the trick. No more overheating on flat ground but it overheated after pulling a long grade. Last winter I pulled the front clip and had the rad. cleaned, flow and pressure tested,installed a new manufactured water pump and replaced the water distribution tube that was plugged at cylinders 5 and 6. I did alot more work than that on it s(see my post 1940 rebuild) My problem was solved. I did not start the engine with the chemicals in place so I don't know if circulation would have helped clearing the water distributiion tube. I am sure that the water pump was not working to full capacity. I have since driven it over 1,000 miles with no trouble.
Jim