Normal Boost Pressure #'s needed / Coolant leak - Ford Powerstroke Diesel Forum
6.4L Problems Forum Having Trouble? Post here

User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 Old 01-28-2012, 11:26 AM Thread Starter
Member
 
Join Date: Sep 2009
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Normal Boost Pressure #'s needed / Coolant leak

Long time lurker not too many posts for me here... Lots of great info here, thanks for that! I've got an 08 F250 6.4 with 57k miles. Its been great until now. It is stock but I do have a dashdaq to monitor engine parameters.

It's been in and out of the shop **5** times over the last three months for a coolant leak. I've already done the radiator so it is not that. They've replaced the degas bottle, degas bottle cap, upper and lower radiator hoses, and most recently both thermostats. They said that it is "positively" fixed this time.

I haven't gotten it to puke as of yet but I do not think that I have driven it hard enough yet. It would *only* puke when driven hard or under a load (we used to tow an 11,000lb boat) Needless to say I am not convinced that it is fixed. Time will tell.

A couple issues after this most recent repair .......

The heat will go from hot to cold while the EOT and ECT are at their normal warm ranges ~190. My mind goes to thermostats opening and closing when they shouldn't be... thoughts?/

Also, I am seeing boost pressures at 15-20 lbs while unloaded, on a flat highway at 65-75 mph with the cruise control set. Also, fuel rail pressures are at 12000-14000, EGT's are normal (not indicating a regen status) Regen is not indicated on the dash info meter, fuel economy sucks!

Can anyone comment on normal boost pressures at a constant highway (flat) speed, unloaded (not towing / hauling) no headwind???

Sorry for the novel, Thanks!!!!
dadriva is offline  
post #2 of 3 Old 01-29-2012, 06:37 AM
Powerstroke Techie

 
Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,824
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 33
Thanked 143 Times in 129 Posts
Garage
Feedback Score: 4 reviews
That is way too much boost for unloaded flat cruising. It is possible it's overboosting and that leads me to my next idea.

I've never seen a 6.4 puke but that (and the heat cycling) makes me suspicious of the headgaskets honestly, while headgasket failures are rare they have occured. For some reason egr cooler failures don't seem to pressurize the degas bottle like 6.0s do.

-Matt

Ford Senior Master Tech

2015 F-250 XLT 6.7L

2006 F-250 6.0L SOLD
sinner6.0L is offline  
post #3 of 3 Old 02-20-2012, 12:31 PM Thread Starter
Member
 
Join Date: Sep 2009
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Still having the issues.. and Ford is just throwingf parts at it.. No heat on highway (70-75mph) and its puking a little in cold weather (below 30F)

Just about the only thing the dealer HAS NOT done is the head gaskets.

anyone else??
dadriva is offline  
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:
OR

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
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