Reverse Flush & Thermostat Instal - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 03-22-2013, 06:03 AM Thread Starter Fanatic
Join Date: Jan 2013
Location: Milton, DE
Posts: 106
Thanks: 5
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Reverse Flush & Thermostat Instal

Hi Gang,
Anyone know how to reverse flush the coolant in our engines?
tartansailor is offline  
Sponsored Links
post #2 of 2 Old 03-22-2013, 08:27 AM
Compression Ignition Addict
Join Date: Aug 2008
Location: Madison, WI
Posts: 4,075
Thanks: 4
Thanked 148 Times in 144 Posts
Mentioned: 3 Post(s)
Quoted: 58 Post(s)
Feedback Score: 0 reviews
Um, leave the tranny in reverse?....

KIDDING!! Not sure what you mean by "reverse" flush. It doesn't matter which way the coolant flows when you flush it out, as long as you get all the old stuff out. There's no advantage to making the water flow in the opposite direction to what the water pump pumps. And if you use any method that involves running the engine, you'll never get the flow to oppose the water pump.

In any event, this: Gooch's Radiator/Engine Backflush Procedure and Coolant Information - Ford Truck Enthusiasts Forums is probably the most-followed procedure. It's a little overkill to me, in terms of how many "repetitions". Important take-aways are:
* Use the tee and an extra piece of heater hose, to preserve your existing hose
* Know where both block drains and the radiator drain are
* Do the flush with the thermostat removed. Good time to replace the thermostat anyway
* Finish with ONLY DISTILLED water and at least 4 gallons of undiluted anti-freeze (our generation of truck should NOT use extended life anti-freeze)
* MUST have sufficient SCA - either added (DCA4, etc), included in the anti-freeze (FleetCharge), or in a pre-charged coolant filter

If you think you've got a restriction, in either the radiator or the heater core, you can reverse flush them individually, but I would do that separately, before the complete flush/refill, and isolate the restricted component from the rest of the system.
madpogue is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome