heater core clogged - Ford F150 Forum - Community of Ford Truck Fans

Go Back   Ford F150 Forum - Community of Ford Truck Fans > Ford F150 Forums > General F150 Discussion
Log In 

heater core clogged

Thread Tools Search this Thread
Old 12-10-2010, 09:09 PM   #1
Junior Member
Join Date: Nov 2010
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default heater core clogged

After I got doors all fixed now I guess my heater core is stopped up. There is 15 degrees difference in the hoses on firewall. Somewhere on this forum I read that this meant core was clogged. One mechanic told me to cut hoses at firewall and force water out with air and pour radiator flush in hoses and let soak and then flush both ways several times. Anyone had this problem and if so does this sound like it will work?
b johns is offline   Reply With Quote
Join F150 Forum

Join F150Forum.com Today - It's Totally Free!

Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that F150Forum.com is a great community to join. Best of all it's totally free!

Join F150Forum.com Today! - Click Here JOIN FOR FREE

Old 12-11-2010, 12:47 AM   #2
Senior Member
Dabegs's Avatar
Join Date: Dec 2010
Posts: 108
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews

pull the hoses loose from the heater core and take a water hose with a spray nossle and spray water into one pipe of the heater core until water starts coming out the other one and then repeat for the other one. It may take a couple if minutes per side. If nothing happens take some purple power or grease lighting type if spray and spray into each spout of the heater core and let stand a couple of minutes and then do the previous steps.
Dabegs is offline   Reply With Quote
Old 12-11-2010, 10:14 AM   #3
in the house
bajaman's Avatar
Join Date: Jul 2010
Location: Kansas
Posts: 2,113
Thanked 6 Times in 6 Posts
Feedback Score: 0 reviews

I've had success on other cars doing the following:
Get a small submersible pump like a Little Giant or equivalent. Get a 5 gallon bucket. Make some hoses long enough to go from the firewall heater core inlet and outlet to wherever you can put the bucket. Hook one to the inlet and one to the outlet and drop into the bucket.
Now get the hottest water you can and put in the bucket, along with 2 - 3 bottles of PRESTONE RADIATOR FLUSH. Hook up one hose (doesn't really matter if inlet or outlet) to the pump and drop into your solution, plug in and let it circulate for 24 hours.
When I've done this in the past, often times one will get next to no flow coming thru the system, you'll have a lot of backpressure on the pump side, so make sure you have some way to allow the backpressure to bypass the pump, by either using a pump that allows bypass or simply having the hose on the pump put on loosely to where some pressure can escape. You can also alternate between having the inlet or outlet hooked to your pump to maximize the cleaning ability of the flush.
If you achieve the same results I did, you'll be amazed at the amount of 'gunk' that comes out. Once you are satisfied with the results and have decent flow thru the system, run a couple of buckets of clear water thru to get out all the radiator flush chemical.

Good luck!
2010 Ingot Silver FX4 SuperCrew

Water's wet, the sky is blue... women have secrets. - Joe Hallenbeck
bajaman is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Antifreeze Water or coolant disappears help allbee1 1997 - 2003 Ford F150 22 10-20-2015 12:46 AM
Coolant leak at firewall dday70 2009 - 2014 Ford F150 3 10-03-2015 10:32 PM
Extended service plan - worth it? MichaelInCalifornia 2015 - Present Ford F150 1 09-30-2015 01:22 PM
A/C drain line Leak drew212f 2009 - 2014 Ford F150 0 09-27-2015 03:05 PM
Cargo box drains won't stay open Peva Pre- 1987 / Classic Corner 0 09-26-2015 05:35 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 08:24 AM.

Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.