Blowby with good compression???!! - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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 01-26-2012, 09:26 AM
Member
 

Join Date: Nov 2010
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Blowby with good compression???!!

I went to a diesel shop to get the #2 injector change because it was weak and it was throwing codes only for that cylinder, while he was running the laptop to confirm that it was really my #2 injector that was bad, he did a compression test and there was 3 cylinder that were a little low, #5 was 2% down, #6 was 5% down and #8 was 2% down, the rest was 100% good. Then he open up the oil cap to check blowby and he said that there was more pressure than normal. How can that be??? Cylinders are barely worn, 5% down doesn't seem low to me, is it?? Plus the truck runs really strong and I have 71000 miles on it. What you guy's think?

I will try to get a video of the blowby when i get a chance.

Last edited by F35008; 01-27-2012 at 12:27 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-26-2012, 09:34 AM
Premium Member
 

Join Date: Oct 2011
Location: Ardmore,AL
Posts: 369
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I would be checking the air filter,inlet hose,and turbo fins for wear, it may be getting dusted. Dirt inside a diesel engine will cause lots and lots of wear.
Reply With Quote Quick reply to this message
  #3  
Old 01-26-2012, 09:50 AM
Compression Ignition Addict
 

Join Date: Nov 2011
Posts: 150
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have blow by at 78k miles and it almosted made me not buy it but my dad has a 08 with 40k easy driven highway miles and it has blow by as well
Reply With Quote Quick reply to this message
  #4  
Old 01-26-2012, 10:04 AM
Powerstroke.org Sponsor



 

Join Date: Dec 2008
Location: Georgia
Posts: 8,615
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
How much blowby are we talking about? A haze or is there enough pressure that if you set the cap on top without tightening, it is blown off? 6.4's have a decent amount to begin with.
Reply With Quote Quick reply to this message
  #5  
Old 01-27-2012, 08:47 AM
Member
 

Join Date: Nov 2010
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
My buddy did film the blowby cumming out of the oil cap, he said that he didn't want to let go the cap because he didn't want to lost it behind the engine but he feel that there was a little to much pressure for the cap to just sit on the tread, doesn't look good...


Here is the link:F350 2008 6.4 engine blowby - YouTube
Reply With Quote Quick reply to this message
  #6  
Old 01-27-2012, 01:16 PM
Powerstroke.org Sponsor
 

Join Date: Jul 2011
Location: Texas
Posts: 1,558
Thanks: 14
Thanked 4 Times in 3 Posts
Feedback Score: 0 reviews
All of the 6.4's I've worked on do that, its normal it seems for a 6.4 but I'm honestly not sure why.
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 12:50 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