Blown Head Gasket? - Diesel Forum -
6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 11-20-2012, 03:57 PM Thread Starter
Senior Member
Join Date: Jan 2003
Location: Chandler Arizona
Posts: 597
My Photos: (0)
Feedback Score: 0 reviews
Blown Head Gasket?

Hi guys. I know this thread has been beat to death and I really did check the "search" button and learned plenty about the blowing cold air when the cabin air is selected to full hot...

My question is "How do you know if you have a blown head gasket when your truck is performing flawlessly and you aren't losing any coolant?"

I replaced the thermostat and flushed and filled the radiator with new coolant and now it acts kind of like it wants to blow hot, but it goes back to blowing ambient air.

2003 F350 Lariat CC 4x4 6.0L Auto Dark Shadow Gray/Black. Options: LT265/75RX16E OWL A/T BFG's, 3.73 Limited slip, ESOF, Camper Package, TT Mirrors, FX4 Package, 6 Disk CD, Reverse Aid Sensors. Born 3/03/03 I LOVE THIS TRUCK!!!!!!

Just because you're paranoid, it doesn't mean they're not after you!
JohnSWA is offline  
Sponsored Links
post #2 of 2 (permalink) Old 11-20-2012, 05:21 PM
Senior Member
dieselmac's Avatar
Join Date: Apr 2009
Location: ByGod, Texas
Posts: 3,962
My Photos: (0)
Feedback Score: 0 reviews
Best way is to tee in a pressure gauge into the small line going to the degas tank and monitor the pressure.

The system is designed to run 16psig max. Above that, the cap will release excess pressure. Normally, you'll run from 8-12 psig of coolant pressure and it will be pretty stable once warmed up. If you have a blown head gasket, you'll build pressure pretty quickly (15+ psig) and it will swing up and down with pedal position.


SOLD -- 2006 F-250 PSD, Lariat
Mods: All the usual stuff

2015 F350, 4x4, Platinum

"Let us endeavor so to live that when we come to die even the undertaker will be sorry" - Mark Twain
dieselmac is offline  
Sponsored Links

  Diesel Forum - > 1999-2007 Ford Super Duties > 6.0L Power Stroke Engine and Drivetrain

Quick Reply

Register Now

In order to be able to post messages on the 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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