Looking for a rad flush DIY I can follow to go through and put new coolant in. It hasn’t been done in about 4 years so I think its time. Not sure I can do it myself without something to guide me along so thanks.

 

I did my '08 last summer. It was a pita because there is no good way to get all the old coolant out.



If I did it again I would take one of the heater hoses off and backflush like that.

 

Too easy on the Tiburon. At the bottom of the radiator itself, there's a plug you can unscrew. Take this out, drain the fluid. Good luck catching it all under the car... LOL

Refill and add the detergent stuff (Autozone, <$10) and run for the recommended number of miles (only a few thousand). Then drain it all out again (yet again, good luck catching it all!) and I even run water through the radiator to get as much out as possible. You could fill it up with water and run the car for a few minutes to cycle it all out of the engine too, but that's usually not necessary. Anyhow, once it's fully flushed, refill with normal antifreeze again.



On a scale of 1-10, this is probably a 2, maybe a 3 depending on where your drain plug is. Just slightly harder than topping off your radiator fluid.



If you wait a couple months, I'm due to do this on my wife's car, so I can take some pics and do a short DIY on it if you want.

 

4 years...might be a little long i tend to do it once a year but i don't bother with the detergents and whatnot. the important thing is that the fluid is replaced due to its chemical breakdown and increase in voltage across the system due to galvanic corrosion.



cant say its a bad thing though:p

 

so the 8+ year old coolant in my Accent should be changed?

 

Depends. If it's super-dee-uper long life rated coolant in a system designed for it, you might be in good shape still.

 

nah just dump a little salt into it. that keeps it going longer!!



i usually check the voltage across the coolant with a multimeter. dont really trust the long life coolant, im mostly concerned with the galvanic corrosion and unfortunately can't see that.