Originally Posted by Ed_Flecko
Originally Posted by doitmyself
Originally Posted by Ed_Flecko
Here's a couple of good articles from AGCO Automotive on the topic:
https://bit.ly/2XqXdly and
https://bit.ly/2IMQ3UD Ed
Ed, I love the AGCO "do it right" attitude. But man, they sure throw some curve balls.
In your first link:
I wonder if some of their articles are out of date. For instance, they state that the original fill is good for five years and after the first change reduce the interval to 3 years.
Does this take in to account today's coolants that recommend 10 years OEM fill?
The second link, wow, some crazy recommendations there.
The AGCO link states that some engines have no circulation in the lower part and added pure coolant will stratify there and not mix with water added separately,supporting a recent thread here asking about coolant not mixing inside the engine,
"With many engines, coolant flows only through the cylinder heads. The lower block fills with liquid but does not flow. Concentrated coolant can enter this area and remain there, because of its weight. Water with a smaller amount of coolant will circulate through the upper part of such a system. This promotes corrosion as the mixture is inadequate to protect the metal in the system. Play it safe by mixing the coolant and distilled water, before pouring them into the engine."
The second AGCO link also states that without block drains, the proper drain method is to
do multiple drain and fills with coolant/water mix NOT pure water:
"When removing (all) the old coolant is not possible (block drains) - When removing at least 80% of the old coolant is not possible, we can repeat the procedure. Drain as much as possible and refill the system with coolant and distilled water. Next, with the heater on high, run the engine until it is normal temperature. Let the system cool and drain it again. This should get a much larger percentage of the depleted coolant out. Never use water for this purpose as it will only dilute the remaining coolant. This further reduces corrosion protection.""
Following their advice, most of us are doing it wrong.
I've listened to the AGCO Auto show for some time now and I have NO doubt that vehicles maintained by them probably run as well as they possibly can. Having said that, I agree as well that they are REALLY perfectionists and you probably have to temper their advice with a little common sense!
Ed
My guess is that Scotty Kilmer was the ghostwriter for these recommendations.