Yellow coolant
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Laughing Gas
Joined: Oct 2014
Posts: 962
Likes: 114
From: Middle TN
Yellow coolant
2015 F250 PSD with 90K miles.
So, the new yellow is backwards compatible, cool.
I was planning on doing a drain and refill on both systems, but don't want to try to remove any oil cooler or block drains, (we get some rust out here). Just draining the radiators is going to leave enough orange in there to turn the new yellow a dark color. Probably not going to hurt anything.........uh....Right??
I tried filling with distilled, running then draining thing on an older truck i had, and that left enough distilled water in the block, making it hard to get to the 50/50 mix, so I wanted to avoid doing that if I could. Any thoughts on this?
So, the new yellow is backwards compatible, cool.
I was planning on doing a drain and refill on both systems, but don't want to try to remove any oil cooler or block drains, (we get some rust out here). Just draining the radiators is going to leave enough orange in there to turn the new yellow a dark color. Probably not going to hurt anything.........uh....Right??
I tried filling with distilled, running then draining thing on an older truck i had, and that left enough distilled water in the block, making it hard to get to the 50/50 mix, so I wanted to avoid doing that if I could. Any thoughts on this?
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
When I changed my coolant to the new stuff I only drained the radiators, I ran distilled water for 3 heat cycles driving up the road with heater on each time & kept track off how much drained out each time. I found that the primary sys kept right at 2 gallons so when I started to fill used 2 gal of the concentrate then 50/50 from there. It ended up with a good # as far as the mix.
I believe the secondary side kept about 3/4 of a gallon but do not remember that side for sure, but did find the way to drain that side was to pull the bottom hose.
I believe the secondary side kept about 3/4 of a gallon but do not remember that side for sure, but did find the way to drain that side was to pull the bottom hose.
Lead Driver
Joined: Feb 2005
Posts: 7,917
Likes: 2,640
From: The Great State of Texas
It's simple to get a 50:50 ratio. Look in your owners manual for you primary coolant capacity and purchase enough distilled water for 3-4 flush cycles. Then you simply drain and refill with distilled water and drive around with your heater on until the temp gauge starts to rise. Repeat this process until you get relatively clean water out of the radiator which I want to say required 4 drain cycles for my truck. At his point your coolant system is close to 100% distilled water. Drain the rad one last time and refill with 50% of your cooling system capacity with Yellow coolant and then top the rest off with distilled water. At this point you have a 50:50 coolant/distilled water.
If you don't want to do this you can simply drain and refill with the prediluted Yellow coolant to get you there, but your coolant system won't realize the true benefits of the Yellow coolant which isn't a bad thing.
If you don't want to do this you can simply drain and refill with the prediluted Yellow coolant to get you there, but your coolant system won't realize the true benefits of the Yellow coolant which isn't a bad thing.
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