Blowby question - Ford Powerstroke Diesel Forum
General Diesel Discussion Discuss everything else pertaining to Diesel Pickups.

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 11-16-2009, 08:39 AM
Compression Ignition Addict
 

Join Date: Nov 2008
Location: Crane/Evansville, IN
Posts: 7,846
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 1 reviews
Exclamation Blowby question

What is it exactly and what does it mean? To check I just take the oil cap off and look for smoke? Thanks
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-16-2009, 09:39 AM
wriott
Guest
 
Posts: n/a
blow by is when the compression inside the cyl above the piston leaks and pressurizes the crankcase. this is mostly from pressures leaking by the piston rings. people say to take the cap off of the oil fill and place it upside down and if it blows off then you have excessive blowby. now on my dually my cap will blow off and when checked at the dealership i was told that it had excessive blow by and to check into a new motor... well i went home and did a compression check and according to my compression my motor is dang near new with all cyl being at 390 PSI +/- 1-2%. only real way to tell is by doing a compression check on all cyls
Reply With Quote Quick reply to this message
  #3  
Old 11-16-2009, 09:46 AM
Super Moderator

 

Join Date: Nov 2008
Posts: 13,271
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 2 reviews
The cap will fall off from the engine vibrations if you put it upsidedown so put it in the oil fill like normal just don't screw it down. I have also read that if you put you hand over the oil fill and smoke comes out, that its excessive. It also said if you can feel the pressure that is also excessive as well.
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 05:20 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