Turbo Question - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-22-2012, 06:47 PM
Powerstroke.org Rookie
 

Join Date: Apr 2012
Location: Fairbanks
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Turbo Question

I have a 2007 6.0 Diesel. After the truck sits overnight, when I start the engine and start down the road there is a whistle, when the boost pressure rises from 0 to 10 psi but then the sound disappears. When the engine is warm the whistle is not there no matter what the boost pressure is. Is this normal or do I have a head gasket leaking?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 05-22-2012, 07:01 PM
Super Moderator


 

Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,983
Thanks: 4
Thanked 31 Times in 16 Posts
Feedback Score: 3 reviews
I suppose it depends on where the whistle is coming from. The turbo will normally whistle some from the tail pipe. It tends to be more noticeable at lower rpm and boost levels.

Head gaskets tend to leak worse as the engine warms up and you get heat expansion. Blown head gaskets typically do not cause a whistle. Could the whistle be coming from your degass tank cap? That could happen if the cap is bad. It could also happen if a bad head gasket is over pressurizing the cooling system. In this case you get a tea kettle kind of whistle and puking from the degass tank. This usually happens when warm and under a load though.

Is your truck puking or losing coolant? Do a little digging around in the engine compartment and let us know what you find.
Reply With Quote Quick reply to this message
  #3  
Old 05-22-2012, 08:03 PM
Powerstroke.org Rookie
 

Join Date: Apr 2012
Location: Fairbanks
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I am not loosing coolant or puking coolant. I will check the degass cap

Thank you
Reply With Quote Quick reply to this message
  #4  
Old 05-22-2012, 08:18 PM
Powerstroke.org Fanatic
 

Join Date: Nov 2011
Posts: 134
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You most likely have a crack in one of the three flexible joints in your up-pipe. I had the same thing...at idle I would get a intermittent "dog whistle" that would go away when I hit the skinny pedal...only to return again while sitting at a light or in a drive-thru. I just did a full EGR delete and got lucky as the crack was in the EGR portion of the up-pipe that I replaced. Unfortunately it is hard to tell where it is coming from until you tear everything apart. If you get lucky you can crawl under the truck and look for some soot on the firewall to pin point which joint it is coming from...I tried that and could see squat!
Reply With Quote Quick reply to this message
  #5  
Old 05-22-2012, 08:44 PM
Powerstroke.org Rookie
 

Join Date: Apr 2012
Location: Fairbanks
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thank you for the information
Reply With Quote Quick reply to this message
  #6  
Old 05-23-2012, 12:20 AM
Super Moderator


 

Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,983
Thanks: 4
Thanked 31 Times in 16 Posts
Feedback Score: 3 reviews
Good observation Face Down. If it is a leaking bellows in the up pipe or Y pipe one way to get an idea where it is coming from is to open the hood and power brake the truck for a few seconds. you should get a telltale of soot from the area that's leaking.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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
Display Modes

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



All times are GMT -8. The time now is 12:54 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors