Motor rebuild #2 - 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 02-20-2008, 06:45 PM
Emergency Services
 

Join Date: Feb 2008
Location: Brazoria,TX
Posts: 447
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Motor rebuild #2

I have an 01 7.3 that I had rebuilt last year. For some reason or another the rings never seated and I have lots of blowby. So the motor is back out for another rebuild. I bought a set of forged rods. Are there other things that I should change while I'm in there. I am also rebuilding the tranny at the same time. Thanks in advance for any suggestions.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 03-01-2008, 10:53 AM
Member
 

Join Date: Jul 2007
Posts: 70
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
are you still on the stcok bore? It sounds like amybe the final finish in the cyclinder was not correct or out of round. It might be a good idea to go one size larger in pistons just to clarify your cylinders are in round after boring it out.
Reply With Quote Quick reply to this message
  #3  
Old 03-01-2008, 01:27 PM
Powerstroke.org Rookie
 

Join Date: Feb 2008
Location: Fullerton, CA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Blow by

My 95 is doing the same thing.
I am not looking forward to rebuilding the engine.
Are you doing this yourself or having it rebuilt?
If you do not mind How much is it costing?
Reply With Quote Quick reply to this message
  #4  
Old 03-01-2008, 01:49 PM
Banned
 

Join Date: Jan 2007
Location: Goodyear, AZ
Posts: 2,083
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I agree about the stock bore. No engine work should be done without machining for new parts. I just finished building on for someone that had the engine built by someone that didn't machine the block.

Since it's apart maybe opt for the comp Cams 910 valve springs.

Good choice on the rods also
Reply With Quote Quick reply to this message
  #5  
Old 03-04-2008, 08:08 PM
Member
 

Join Date: Nov 2006
Location: Oklahoma City OK.
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to dumokie
Crosshatch angle

Just gonna throw this out there.. Crosshatch angle is CRITICAL!!
If the crosshatch angle is too steep, the rings can pump oil or experience excessive
rotation which will accelerate wear in the rings and piston lands. If the crosshatch
angle is too shallow, it can have a ratcheting effect as the rings pass over the
valleys, preventing the rings from receiving proper lubrication.
A proper crosshatch will also have enough valleys to retain oil, but not too much oil.
The secret here is getting the right amount of retained oil volume (Vo). If the
crosshatch scratches are too deep or there are too many valleys (not enough peaks
and bearing area), the engine will use excessive oil.
Your bore could be perfect along with rings but if crosshatch angle is wrong may cause you to dangle.. Just my experience..
Good Luck
Reply With Quote Quick reply to this message
  #6  
Old 03-04-2008, 08:19 PM
International Threat
 

Join Date: May 2006
Location: Elkton, MD
Posts: 13,087
Thanks: 0
Thanked 6 Times in 4 Posts
Feedback Score: 1 reviews
Are you turning up the power or keeping it stock?
Reply With Quote Quick reply to this message
  #7  
Old 03-04-2008, 08:44 PM
KVFD
 

Join Date: Nov 2007
Location: Kearney, Nebraska
Posts: 4,061
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via MSN to redstroker_2002
Marty is in the same step u r bud!
Reply With Quote Quick reply to this message
  #8  
Old 03-07-2008, 12:56 PM
Emergency Services
 

Join Date: Feb 2008
Location: Brazoria,TX
Posts: 447
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Update on this. I had this motor rebuilt last year. It had broke a piston at the wrist pin. New block was bored .20 over. The guy who built it also builds NHRA motors and is a friend. My brother-in-law's shop is the one that pulled it and replaced it. From the start there was a small vibration, then we noticed the blowby. I had put a Garrett BB turbo and some Stage II injectors while we were in there figuring the truck was paid for and could make this one last several more years for a lot less money than a new one even with adding the extras. The motor builder thought that the rings just needed some time to seat and told me to drive it.Well, they never seated. The builder just tore the motor back down and found that the rings had eaten out the cylinder walls. He is now saying that he thinks this is due to my aftermarket turbo and injectors and said that more end gap should have been put in the rings for this. I think he is full of it and is just trying to get out of paying for something that he didn't do right the first time. I've never heard of having to adjust ring gap for a larger turbo and injectors. Sorry for the long post.
Reply With Quote Quick reply to this message
  #9  
Old 03-07-2008, 01:18 PM
Let's go B's!!!!

 

Join Date: Mar 2007
Location: Remington, Va. U.S.A.
Posts: 6,023
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 5 reviews
Sound slike he's full of it to me.
HMM sure are a lot of 7.3 rebuilds here lately.....

How bout headstuds while you're in there?
Reply With Quote Quick reply to this message
  #10  
Old 03-07-2008, 01:42 PM
Emergency Services
 

Join Date: Feb 2008
Location: Brazoria,TX
Posts: 447
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Just waiting to see if the shop's insurance says. If they are paying for a new short block, I think I'll buy one from Diesel Innovations. If that happens, I'll put in headstuds,pushrods and springs. It should be bullet proof then.
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 08:01 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