Oil in cac tubes - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 12-05-2010, 12:19 AM
Making ported intakes


Join Date: Dec 2010
Location: Anaheim, Ca
Posts: 1,727
Thanks: 118
Thanked 78 Times in 69 Posts
Feedback Score: 2 reviews
Oil in cac tubes

hey guys im new
anywho i found some oil in my cac tubes when i recently did my fuel reg spring update and banjos. im going to do a ccv mod to stop the oil from going into the innercooler. is there any performance gains when this is done and or should i get a new inner cooler first and then ccv mod?
Reply With Quote Quick reply to this message
Sponsored Links
Old 12-06-2010, 02:51 PM
Powerstroke.org Fanatic

Join Date: Nov 2010
Location: Cape Coral, FL
Posts: 107
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 3 reviews
there is supposed to be some oil in the cac tubes, it is normal. and dont waste your time with that mod.
Reply With Quote Quick reply to this message
Old 12-07-2010, 12:29 PM
Serving Our Country!

Join Date: Apr 2010
Location: Clinton, MS
Posts: 637
Thanks: 0
Thanked 6 Times in 5 Posts
Feedback Score: 0 reviews
Oil in the CAC, the boost tubes, and boots are a consequence of design - not a condition of it - and the oil does affect efficiency of the intercooler's heat transfer capacity. You do not need to replace your intercooler even if it has a significant quantity of oil throughout though unless you also have blown out the ends (not typical).

Positive Crankcase Ventilation (PCV) is a requirement both environmentally and performance-wise. Without ventilating crankcase gasses, engine seals would rupture and spill the entire contents of your oil system. Environmentally speaking, PCV provides relief for the gasses that blow-by piston rings to burn off in the combustion chamber where they escaped in a previous compression-combustion cycle.

An unintended consequence of PCV is that oil vapor is also picked up from the crankcase in addition to the combustion chamber blow-by gasses. This oil vapor adheres to every surface it comes into contact with beginning at the breather outlet inside the turbo compressor intake (it looks like a little hollow spear).

The oil vapor does react with silicone and breaks down its pliability resulting in splitting and either slipping the boots from the boost tubes or turbo compressor outlet or rupture frequenly on the lower connection between the intercooler and the inlet boost tube. As oil does not have as good of heat exchange as other fluids (air and coolant among others) it reduces the efficiency of the intercooler (it still works just not as well...it's not a significant atrophy though). Nevertheless, the elimination of this oil vapor will allow better heat exchange in the intercooler and avoid boot blowoff or boot ruptures.

The way to maintain PCV and eliminate the oil vapor is with inline filtration with a CCV reroute. Some would ventilate the crankcase vapors to atmosphere but a small differential in pressure will turn the system into a oil dispenser...only effective when attempting to elude capture by forces of evil intent (perhaps zombies chasing you down). Keeping the system in a closed-loop with a filter maintains the pressure but eliminates the tiny oil droplets in the vapor. Certainly the filter must be drained periodically as the oil accumulates; this is simple enough with the addition of a drain valve on the bottom of the filter body or through exchange of the filter media.

Both Stealth-Automotive.com and DieselPerformance.com carry CCV reroute kits with inline filtration to maintain proper PCV in a closed-loop system to comply with federal emissions standards (and avoid the potential for catastrophic oil loss with a pressure differential when ventilated to atmosphere). Use of inline filtration will immediately begin to allow oil within the intercooler and boost tubes to evaporate. If you wish to accelerate this process you can remove your intercooler and take it to a radiator shop for steam cleaning. Things will begin to clear up immediately though. I have the Stealth-Automotive.com kit and think it is very good.

It's a good modification but won't provide much performance increase if that is your primary consideration. A coolant filter and gauges are a more worthwhile investment as is proper maintenance of your coolant or flush and exchange to a better coolant (and then proper maintenance as well).

Hope this is helpful.

Reply With Quote Quick reply to this message
Old 12-08-2010, 11:04 AM
Making ported intakes


Join Date: Dec 2010
Location: Anaheim, Ca
Posts: 1,727
Thanks: 118
Thanked 78 Times in 69 Posts
Feedback Score: 2 reviews
Hooah thank you Major Howell
Reply With Quote Quick reply to this message
Old 12-08-2010, 11:06 AM


Join Date: Dec 2006
Location: Surprise, Arizona
Posts: 17,839
Thanks: 15
Thanked 128 Times in 107 Posts
Feedback Score: 4 reviews
Sounds like you got all the information...
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 08:50 AM.

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.