Educate me - 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 01-09-2011, 02:51 PM
LawDog - Premium Member

 

Join Date: Nov 2006
Location: Bostic N.C.
Posts: 47
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Educate me

Please educate me on something I have read on a vendorís website.

This is what I found:

2005 saw the release of the redesigned 6.0L engine with radical changes to the cylinder heads which helped improve head gasket sealing and virtually eliminated coolant leaks.

I was thinking 05's and up still have head bolt problems along egr/oil cooler problems.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-09-2011, 03:57 PM
Compression Ignition Addict

 

Join Date: Aug 2010
Location: Spokane, Wa
Posts: 8,068
Thanks: 94
Thanked 133 Times in 105 Posts
Feedback Score: 0 reviews
That is a good question as I have also heard the 06's are less common to blow a head gasket than the earlier years.
Reply With Quote Quick reply to this message
  #3  
Old 01-09-2011, 04:03 PM
Compression Ignition Addict
 

Join Date: May 2010
Location: Orlando, FL
Posts: 157
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I believe you're talking about Job 1 and Job 2 trucks. Job 1 =build date before January 11 of 2006 = 18 mm dowels. Job 2 = build date after January 12 2006 = 20 mm dowels. I believe I'm correct on that. Mine is Job 2 and still had Head gasket problems. And I have heard that you have to check engine build date not truck build date. Hope this helps!
Reply With Quote Quick reply to this message
  #4  
Old 01-09-2011, 04:28 PM
Compression Ignition Addict
 

Join Date: Apr 2007
Posts: 2,547
Thanks: 8
Thanked 14 Times in 11 Posts
Feedback Score: 0 reviews
The dowells are just alignment dowells. The actual head bolts are the same - same size, same everything. Head gasket leaks don't leak coolant, they leak exhaust gas into the coolant which overpressures the degas bottle cap (the "relief valve").
With the previous input I will modify the statement:

As a GENERAL RULE, head gasket leaks do not substantially leak coolant. YES - All failure modes are possible, but by far the most common occurrence is combustion gasses into the coolant. YES - some coolant can get into the cylinder on the intake stroke, etc., but the primary evidence will almost always be higher pressure cylinder gasses into the coolant.

Last edited by bismic; 01-10-2011 at 03:45 AM.
Reply With Quote Quick reply to this message
  #5  
Old 01-09-2011, 08:23 PM
Super Moderator


 

Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,973
Thanks: 3
Thanked 30 Times in 16 Posts
Feedback Score: 3 reviews
All of it starts with the lousy G-05 coolant Ford put in the 6.0. It is responsible for cloggin the oil cooler, rupturing egr coolers, puking out of the degass bottle and blown head gaskets. There is more info in the links in my signature that will help you to understand what happens better.
Reply With Quote Quick reply to this message
  #6  
Old 01-09-2011, 09:16 PM
Banned
 

Join Date: Mar 2010
Location: Mobile, AL
Posts: 839
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by bismic View Post
The dowells are just alignment dowells. The actual head bolts are the same - same size, same everything. Head gasket leaks don't leak coolant, they leak exhaust gas into the coolant which overpressures the degas bottle cap (the "relief valve").
You're totally wrong there. Head gaskets have a few different failure points and one of them is just looking coolant out the block onto the outside. I've seen this several time. It can also leak only oil to the outside of the block, coolant to the cylinder, oil to the cylinder.

There are more obvious failure points, but there are many more than just exhaust into the coolant.
Reply With Quote Quick reply to this message
  #7  
Old 01-09-2011, 10:43 PM
Compression Ignition Addict
 

Join Date: Jul 2009
Location: Florida
Posts: 937
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
subscribed
Reply With Quote Quick reply to this message
  #8  
Old 01-10-2011, 01:35 AM
Super Moderator


 

Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,973
Thanks: 3
Thanked 30 Times in 16 Posts
Feedback Score: 3 reviews
Quote:
Originally Posted by obsidian View Post
You're totally wrong there. Head gaskets have a few different failure points and one of them is just looking coolant out the block onto the outside. I've seen this several time. It can also leak only oil to the outside of the block, coolant to the cylinder, oil to the cylinder.

There are more obvious failure points, but there are many more than just exhaust into the coolant.
Lets not leave out the ever popular coolant into the oil. It all depends on where the gasket lets loose.
Reply With Quote Quick reply to this message
  #9  
Old 01-10-2011, 01:46 AM
Compression Ignition Addict
 

Join Date: Sep 2009
Posts: 389
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
subscribed
Reply With Quote Quick reply to this message
  #10  
Old 01-10-2011, 03:53 AM
Compression Ignition Addict
 

Join Date: Apr 2007
Posts: 2,547
Thanks: 8
Thanked 14 Times in 11 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by obsidian View Post
You're totally wrong there. Head gaskets have a few different failure points and one of them is just looking coolant out the block onto the outside. I've seen this several time. It can also leak only oil to the outside of the block, coolant to the cylinder, oil to the cylinder.

There are more obvious failure points, but there are many more than just exhaust into the coolant.
I agree w/ you, I over generalized, but not totally wrong since the dowell info is totally correct - lol.

I will agree that all failure modes are possible. HOWEVER, the original post indicated that head gaskets sealing will eliminate coolant leaks. This is the statement that is totally wrong. Because of this, I make the revised point - BY FAR, the most common issue with head gasket leaks is combustion gasses leaking into the coolant.

Again - I agree that all failure mechanisms are possible (and have happened), but the combustion gasses are MUCH higher pressure than the coolant or oil and therefore the most common failure is combustion gasses into the coolant. Yes you can get some coolant into the cylinders on intake strokes, yes you can see external leaks, but whenever head gaskets are weakened for whatever reason, most commonly the issue will be seen by high pressure combustion gasses leaking into the coolant. Coolant and oil pressures are certainly no higher than 75 psig off of the pump discharges (spec for LPOP discharge regulator). Even hand tightened connections can seal against leaks under these kinds of low pressures as opposed to the high pressures generated in the cylinders that require highly torqued bolts/studs.

Some of these combustion gas leaks into the coolant do not cause puking right away, but they do eventually lead to big problems, even when the leak is small. That being said, there are plenty of cases of oil coolers plugging without head gasket leaks. Also, there are cases of EGR coolers failing without oil coolers being plugged. So again - practically anything is possible.

Ford has done investigations and shown that COMBUSTION GASSES GETTING INTO THE COOLANT WILL PRECIPITATE SILICATES. Therefore this raises the question:

Which comes first?
- bad coolant plugging the oil coolers, then causing EGR coolers to fail and then getting coolant into the cylinders and popping head gaskets?
- OR -
- Is it slight head gasket leaks letting combustion gasses get into the coolant that BEGINS the silicate "drop out" process and sets the previously described events in motion?

IMO the answer is both.

Last edited by bismic; 01-10-2011 at 09:04 AM.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 01:15 PM.


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