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Old 05-11-2011, 06:45 PM
LiveLifeChill LiveLifeChill is offline
Ford Ranger Driver
Join Date: Oct 2010
Posts: 1,420
Default How do i do a proper radiator flush.

Could someone point me in the right direction for doing a full system flush on my 2006 4.0. Sorry i know this is the second post i just have to do this saturday and wanna do it correct. I'm replacing the thermostat and housing, so if there is a good order i guess to do this let me know. Thanks for the help.

P.s. "Flush for dummies" is what i need right now. School/work has my mind shot.
2006 XLT 4.0SOHC
Herculiner>Cab&Bed A.R.E. Camper Shell> 2 Yakima Racks. Pioneer Sound System>Head Unit/6x8's/10" Sub 300 Watt 4-Channel Amp + 2 Marine Speakers
in the Shell.Aftermarket Fuse Box All the Extras Run Off Their Own Fuse Box. Various other mods. Near future plans are a solar panel system and deep cell battery.
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Old 05-11-2011, 07:56 PM
ranger4.0 ranger4.0 is offline
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Join Date: Oct 2009
Posts: 581
Default Re: How do i do a proper radiator flush.

easiet way to do it is buy a flush and fill prestone kit it comes with all the fittings. (follow the kit instructions but mine are pretty close) First cut the heater core inlet hose and install the correct size tee from the kit. then place on the cap. then drain the radiator and system from all the fluid. then remove the radiator cap and install the piece that directs all the fluid from the radiator outlet away from the car. then hookup the hose and run the car letting water run through the system until the water is clear then remove the yellow tube and the hose. then drain the radiator agiant and refill with fresh coolant. then remove that cap in the heater core line and run the car until it comes out bright green. recap it. then run the car until it get to normal operating temperauter with all the caps on and check the coolant periodically. hope that about does it let me know how it goes!
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Old 02-16-2012, 10:45 PM
ChrisHanson1993 ChrisHanson1993 is offline
Ford Truck Driver
Join Date: Nov 2011
Posts: 77
Default Re: How do i do a proper radiator flush.

hey i plan on doing this to my 89 ranger 2.9 L my ? is why would you cut the hose open then you have to buy a new one isnt there any other way to do this
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Old 02-16-2012, 11:27 PM
Centma Centma is offline
Join Date: Sep 2011
Posts: 93

The tee stays in the line, it just provides a place to connect the garden hose source of fresh water for the flush ( and has a cap).

So you don't replace the heater hose, only modify it. I think on my 3.0 I put the tee instead of the heater control valve as a temporary connection, then put the control valve back in when I was done with the flush. The kit is generic, not all vehicles have a spot for a temporary tee installation.

There is a back flow preventer in the kit to keep any coolant from going back into the garden hose connection. The kit was cheap, it's only a bunch of plastic parts (and not many parts, either).
1998 Ranger reg cab long bed XLT 4wd 3.0L 5 speed manual 4 whl ABS option, Delta toolbox, Pioneer DEH-3300 w/USB, deep jewel green exterior/medium prairie tan interior. Goodyear Duratrac 245/75R16. 165K miles. Amateur radio N1EWB.
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4.0, coolant flush, radiator

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