flushing cooling system on my z71

[bignasty250]

i know its not my powerstroke but i cracked my radiator last night and just got back from picking a new one. i took my old one out but here is my question. i put that crappy stop leak in my truck before i took the cracked radiator out and now i want to get it out, how do i flush my cooling system with the radiator out because i dont wanna put my new one in and get that junk in there. thanks for the help in advance

[JohnO]

Should be able to pull the thermostat, put a garden hose in the inlet for it, and let fly with the water. Take a while, but that should flush it out.

Or... you could jack up the radiator cap and drive a PS under it. That'll solve the problem in style.

[TwinTurboStroker]

Originally Posted by JohnO

Should be able to pull the thermostat, put a garden hose in the inlet for it, and let fly with the water. Take a while, but that should flush it out.

Or... you could jack up the radiator cap and drive a PS under it. That'll solve the problem in style.

.......yeah the water hose thing will work, but if your Z71 requires Dex Cool make sure at least half the mix is Dex-Cool other wise you'll end up with corrosion

[MrJohnWayne]

Honestly if your truck requires dex cool I would use some good flush and completely get rid of that crap and go back with the green stuff...... But you will have to flush the system.

dexcool and green will not mix...