6.4L Warm-up Time - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 11-29-2007, 04:45 AM Thread Starter
Powerstroke.org Rookie
Join Date: May 2007
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
6.4L Warm-up Time

I'm posting the warm-up time for my '08 F350 6.4L in hopes that someone can tell me if it is abnormal or not. It seems awfully long to me and I'm suspecting a stuck thermostat which doesn't fully close. I'm writing here about the engine warm-up time - The tranny warm-up is OK, very fast.

Outside temperature -- 15 deg. Truck heater turned off.
1. Initial warm-up at fast idle ---------------------- 15 seconds.
(abnormally short, sacrificing engine for science)
2. Gauge needle makes first detectable movement ---2.9 miles in 11 min.
(driving very slow to protect engine)
3. Needle just touches the "normal range" mark ----- 4.1 miles in 15 min.
4. Needle passes into the normal range ------------- 4.6 miles in 17 min.
5. Needle fully up and steady ---------------------- 7.5 miles in 22 min.

This 6.4L is a big hunk of iron so I suppose it should take longer to warm up than a typical large aluminum auto engine but these figures mean I could drive to the center of the city of Minneapolis from the suburbs before the engine is fully warm - And it hasn't even gotten cold around here yet!

I did not re-run the test with the cab heater on but I imagine it would lengthen the warmup.
Ancient_Guy is offline  
post #2 of 2 Old 11-29-2007, 08:08 AM
Thats Mr. Oil Leak.....

MrJohnWayne's Avatar
Join Date: Oct 2006
Location: Waller/Magnolia
Posts: 9,604
Thanks: 9
Thanked 4 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 5 Post(s)
Feedback Score: 0 reviews
Not sure bud. Here where I'm at it takes about 10 minutes (7 miles) for the truck to reach op temp and that is with 40* outside temp.

And yes it is a 6.4, not the truck in my sig.

John Wayne
Owner and Operator of the
You can find me on FaceBook
MrJohnWayne is offline  

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