Injector O-Rings? - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 10-06-2010, 04:00 PM Rookie

Join Date: Jan 2010
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Injector O-Rings?

I just changed the head on the passenger side, I switched over all my stuff from old head (injectors, rockers, etc). I didn't change the injector orings when I swapped them, they looked ok to me, and the engine only has around 66,000miles on it. After getting it running it was hard to start (took awhile cranking, I figured it was just air working it's way out of the HPOP system. I drove it for a while today, and it's still hard to start (cold & hot) takes like 10 seconds of cranking before it turns over. If i shut it off and restart it right away it's fine, but if a wait like 5 minutes it's hard again.
I noticed after I turn it off a noise coming from only that head/side. It sounds like air or pressure leaking/bleeding. Kinda a hissing sound. Could this be the high pressure oil leaking from around the injector orings, and that's why it's hard to restart since it need to rebuild the oil pressure?

Reply With Quote Quick reply to this message
Sponsored Links
Old 10-07-2010, 02:35 PM

Join Date: Oct 2009
Location: North Port
Posts: 920
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 3 reviews
When ever you remove the injectors its always a good idea to replace the O-rings on them. On customer trucks it normally takes driving 6 miles round trip on the interstate and a good 5 cold starts and 5 warm starts before all the air is out. Now I dont want to make you sound stupid but when you heard this noise was it right after you shut the truck down with the A/C ON? Drive it with the A/C OFF and see if you still hear it. The sound might be the pressures equalizing across the orface tube in the A/C line which is right next to the passenger side head.
Reply With Quote Quick reply to this message
Old 10-08-2010, 11:53 AM Rookie

Join Date: Jan 2010
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Hi, thanks for the reply. You were right, it just needed to be driven. Starts right up now, better than I think it ever has! lol As far as the hissing sound, you might be right, and I do feel a ittle stupid, I wasn't thinking about the ac being on, but the defroster was on, so I think you were right, I turned off the heating/ac and the noise stopped.

I ordered injector O-rings anyway. Figured be good to have them on hand if I ever need to pull the injectors or it starts acting up.
Reply With Quote Quick reply to this message
Sponsored Links

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:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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 04:36 PM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.