77 F-150 overheating / cooling issues - Ford F150 Forum - Community of Ford Truck Fans

Go Back   Ford F150 Forum - Community of Ford Truck Fans > Pre-1997 F150 > Pre- 1987 / Classic Corner
Log In 

77 F-150 overheating / cooling issues

Thread Tools Search this Thread
Old 09-13-2013, 01:34 PM   #1
Junior Member
Join Date: Sep 2013
Location: New Market, MD
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default 77 F-150 overheating / cooling issues

I have a 77 f150 400. Radiator recently went bad so we replaced with a newone (not the cheap ones you find at advance auto). After replacing the radiatorthe engine continues to overheat at an idle. To the point where the coolantoverflows. Below what is has been done and known to be good:

- new radiator
- thermostat is good
- replaced flex fan with an original so the pull is stronger at an idle.
- coolant is flowing

There was not a shroud on the previous radiator, and we had no issue withoverheating. I have a shroud to put on, but since the radiator is not an OEM,some modification has to be done so it will line up. The only other item we canthink to check is the timing.

Any other suggestions of what to check? Again we had no issue withoverheating prior to the radiator going bad.
Phlip 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 09-13-2013, 04:18 PM   #2
Senior Member
JayzDaddy's Avatar
Join Date: Jan 2013
Location: Covington VA
Posts: 536
Thanked 50 Times in 49 Posts
Feedback Score: 0 reviews

You may have a air pocket. Top off the system then bring it up to temp while the cap is off. Might be the issue.
JayzDaddy is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Batteries and LP Lights Garrett99 1987 - 1996 F150 13 09-08-2015 02:43 PM
4.2 overheating still milro 2004 - 2008 Ford F150 4 09-08-2015 08:16 AM
heated and cool seat wire diagram , Melect 2009 - 2014 Ford F150 14 09-07-2015 01:24 AM
91' F150 351 / Fuel pump relay issue puke22 1987 - 1996 F150 1 09-05-2015 05:02 PM
Rust purdue616 2009 - 2014 Ford F150 4 09-03-2015 08:21 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 05:16 PM.

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