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My 3/s had mostly water in it. It’s old, sat, and I need to flush/clean it. My new water pump should be coming in and before I put it on I want to make sure I have it as clean as I can.

Before I go down the YouTube rabbit hole….any suggestions?


Coop

50/50 mix. Which water pump did you get? Is oem even an option anymore. Lots of bad quality water pumps out there that fail abruptly and ruin engines.

if its rusty due to running mostly water youll want to do a chemical flush.

https://fcsdchemicalsandlubricants.com/ ... ails?id=82

ive also been converting all my vehicles to the new motorcraft yellow coolant. its very good.

https://fcsdchemicalsandlubricants.com/ ... vc1&id=107

ChargerX3 wrote: ↑Thu Jun 04, 2026 5:47 pm 50/50 mix. Which water pump did you get? Is oem even an option anymore. Lots of bad quality water pumps out there that fail abruptly and ruin engines.

I got the billet one from euro spec coming. Says it will be here today actually.


Coop

vr4 wrote: ↑Thu Jun 04, 2026 5:54 pm if its rusty due to running mostly water youll want to do a chemical flush.

https://fcsdchemicalsandlubricants.com/ ... ails?id=82

ive also been converting all my vehicles to the new motorcraft yellow coolant. its very good.

https://fcsdchemicalsandlubricants.com/ ... vc1&id=107

Great info. Thank you. How much of the motocraft to water do you mix?


Coop