Blow by - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

LinkBack Thread Tools Display Modes
post #1 of 3 Old 04-23-2007, 12:05 PM Thread Starter Rookie
Join Date: Apr 2007
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Blow by

I am looking at a 92 f250 7.3 it is kicking oil all over the motor to the point it is even on the side of the hood it seems to run ok. It needs two new batteries and a set of glow plugs. the person selling it called it blow by but I alway thought blow by was smoke in the valve covers it the head gasket was worn out. on gas engines. I only desels I have ever owned was a 83 mercedes 300sd so Can some one give me a working def of "Blow By" and what causes it. Since this is not a power stroke its a 92 supercab what else should I look at on this think. I know they have a problem with transmissions but other than that. Also what should I do to help lenghten the life of the trans other than not overheating it and changing the fluid. thank you so much!!!
brian_hobbs is offline  
post #2 of 3 Old 04-23-2007, 12:57 PM

SCUFFY828's Avatar
Join Date: Oct 2006
Location: winston salem north carolina
Posts: 9,316
Thanks: 0
Thanked 11 Times in 11 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
blow by in a diesel is most of the time referred to as crankcase pressure , same thing though , if the truck you are lookin at has high crankcase pressure more than likely it nees a rebuild , rings are probably shot , unles you can buy it dirt cheap and want to spend a couple thousand , these engine are usually good engines , if its worn that bad someone probably hasnt taken care of it ,glow plugs and relays on 7.3 idi are very common problems and even when they are working right most idi are still hard to start cold , injection pumps go out from time to time , can be a little expensive , not a major problem though , i have a 1990 extended cab with 220,000 miles on it and i havent had very few problems , but if this this one is worn that bad ,its up to you

SCUFFY828 is offline  
post #3 of 3 Old 04-24-2007, 07:09 AM Thread Starter Rookie
Join Date: Apr 2007
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thanks the deal is almost to good to pass up. I know I will have to put some money into it, so I'm prepared for that. Thank you some much for the info. You told me just what I needed to know.
brian_hobbs 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