Re: Antifreeze

Posted by redforlife on December 22, 2022 at 09:12:06 from (174.213.209.116):

In Reply to: Antifreeze posted by grandpa Love on December 21, 2022 at 15:38:50:

If it checked out at 10, and that's all it gets down to is 10, you should be OK. It could slush up a little, or not circulate through the radiator on a cold start because of it, but other than that it should be OK as far as not freezing up solid and busting something (block).

My only deal is with that, many testers (especially the floating balls testers), give you readings in increments of about 10 degrees. One ball is this. 2 balls is that. So if one of those testers gives me a reading of 10, how do I know if it is not actually 6 or 14??

A radiator is ussually not full when you take the cap off, if its not a pressurized system with an overflow reservoir. Most old tractors fit into this category. Always be a quart or two low from being ran at operating temperature and pushing the excess out of the overflow pipe with no reservoir. So, ... when I check one and it comes out to be border line or to weak for my liking, I'll just top it off with straight antifreeze (not the already 50/50 blended). Adding a quart or 2 of straight antifreeze will knock that test reading down another 10 or 20 degrees.
Note- ... If you add straight antifreeze to the system to strengthen the blend, you need to start the engine so the water pump can mix the fluid within the system. It will likely mix it before blowing the excess out the overflow (IF) it don't have a thermostat. Should be well mixed once you reach operating temperature. A thermosiphhon system works different. So this doesn't work as well in those systems. More straight antifreeze may be lost to overflow, and those systems have to run much longer to blend the coolant.

If you don't run tractor after adding the straight antifreeze, the straight antifreeze will just sit in there on top, and won't do any good because it's not blended with the rest of it. And also, you can not get another accurate test reading if the engine has not ran again since adding the straight antifreeze.

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