That darn yellow light is on again!!!

[normde2001]

Best explanation I ever heard......didn't realize the change in density of heated anti-freeze was that much less than that of heated water. I always thought the thicker liguid just didn't flow through the small passages as freely. Sure makes sense to me.

 

[mah]

I recommend having the radiator rodded out for maximum cooling. It more than likely has scale buildup after 20 plus years. Then add 60/40 coolant mix.

Mike

 

[jimstractors]

I checked my YM169D operation manual and it said NOT to use more than 40% anti-freeze in the summer to avoid overheating.
Jim

 

[gbirky]

Jim,
I was under the impression that the YM169D was very similar to the YM1401D which has a water pump. Does the YM169D have a water pump?

These restrictions on maximum anti-freeze apply only to the termosyphon (no water pump) engines.

 

[jimstractors]

Greg,
The YM169d and YM1401d are real close. In fact that is the manual I use for my 1401d's. The funny thing is that the service manual says a YM169 has a water pump, but the operation manual (under "service" page 63) says it does not (see attachment). The YM169d has a 3 cylinder engine just like the 1401d, so the service manual must be correct and the operations manual must be in error. The 40% mix is probably correct though.
Jim

 

[kayssupply]

I saw a post either here or the old Yahoo club,when talking about this same subject, that said there was an additive for racing engines and diesels that made the water carry more heat. If someone remembers what it was, it might be useful.

 

[Ozarker]

The capacity is just over a gallon. (4.2L = about 4 1/2 quarts)

Someone else mentioned a 30/70 mix and he is right. The old timers who helped me with this problem before told me a 30/70 mix.

The manual says not to exceed a 40/60 mix so anywhere between that is probably going to do the trick for you. Mine is actually a 33/66 mix since I just dumped a gal of anti-freeze into a 5 gal can, dumped 2 gal of water in with it and marked it for the tractor. Then I flushed the system with a radiator cleaner followed by a fresh water flush and filled it with the new mix.

My overheating problem disappeared.

 

[Anonymous Poster]

One of the companies that makes this additive is Redline. It is called Watter Wetter. I used it on my CJ7 with a 454 in it. Worked very nice. I would recommend it for autos, but I will not mention tractors since I know basically nothing about them yet. I am doing a lot of reading trying to learn.

Just thought I would offer something on a subject I know.

Ken H.