Featuring Critical Knowledge For Ford Power Stroke Diesel Owners


Archoil
Info
Purchase
Archoil
Sign-In
Take a
FREE Tour
Subscribe
7.3 Liter
1994-2003
6.0 Liter
2003-2007
6.4 Liter
2008-2010
6.7 Liter
2010+
Common
PSD Info...
FUBAR
Very Broken PSD's... The How & Why It Happened

Repair
Facility Info
Contact
Hear the EDAS Alert
6.7L EGR Cooler Failure


I want to talk today about EGR cooler failure in a 6.7L and compare the system to the 6.4L. This is an EGR cooler in a 6.7 that is clogged on one side so there is no flow through. This particular engine behind me (6.4L), for comparison purposes, came from an ambulance with 120,000 hard miles on it and almost 2,500 hours of idle time.

The 6.7L has a cooler on the EGR system where the exhaust cools down in a cooler before it goes into the intake. Exhaust gas recirculation (EGR) means that exhaust gas goes back and gets reintroduced into the intake and run through the engine and burnt one more time. It is the same idea as a gasoline motor. It reduces the nasty stuff that comes out of the tailpipe. On the 6.7 the intake comes from the outside instead of the exhaust manifold on a 6.4. What happens is it passes through the EGR valve first so that the EGR valve is on the hot end which keeps the EGR valve on a 6.7 clean. But it goes through the one side of the EGR cooler and then out the other side so there is a cool side. The cool side of the EGR system regardless of whether the valve is on the beginning end or the back end is going to be the side that clogs.

The diesel engine doesn’t create heat like a gasoline engine. A diesel engine creates heat only when it is under loads. When it is idling, it is running very cold. If a diesel engine is not being pushed then it is not going to burn off these hydrocarbons especially with idle times like this where a truck will sit for 10, 12, 14 hours just idling. So you get this buildup inside. This is a common EGR clog.

You cannot stop coking in the EGR system due to idle. I don’t care what kind of design you have. It is impossible. Whether it is Chevrolet, Ford, Dodge, Cat, whatever, idle time will clog up the intake system. It is just a fact of life. However, the 6.7 is such an improvment over the 6.4, because the EGR valve is on the hot side of the 6.7 and all of the carbon gets burned off, it is very seldom a problem so that expensive component stays clean. On the 6.4 though, the EGR gases come in at the back of the lower EGR cooler and goes through the upper EGR cooler and the cold part is over by the valve. If the valves had been on the back side where it was hot, it wouldn’t have been a problem.

Another benefit of the design improvement in the 6.7L is the replacement and maintenance cost. There are two EGR coolers on a 6.4L; the lower is about $500, the upper is about $400. Usually you have to replace both of them with a tremendous amount of labor involved. On the 6.7 the part is cheaper and it is much easier to get to. The parts and labor cost is much lower than it is to disassemble half the engine in a 6.4.

How do you keep these things from clogging? Just go down the road and blow the carbon out of it. Just like the old days - drop the hammer and keep running it until the smoke quits coming out the tailpipe. It will clean itself. There is no cure for coking up the EGR cooler with idle time. If you are idling the vehicle all day and night, this is what is going to happen
. ~Bill Hewitt

Archoil Challenge FREE give-away offer!



Take the Archoil Challenge... CLICK HERE!
PSH Newsdesk...
How to Buy a Used Powerstroke Truck
This video delves into the top things to look for when you are in the market for a used Powerstroke Diesel truck. Discussed are the advantages and pit falls of purchasing from dealers as well as individuals. Follow the inspection worksheet to uncover potentially expensive pitfalls.
Click Here To See The Video!

Spot, The PSH Shop Truck & Faithful Mule Dies at 798,169 Miles...
Spot, our shop truck you see featured in many of our repair videos, just suffered a catastrophic failure (Threw a rod destroying the block). We did a postmortem tear-down so you can see the wear points of a 7.3L Powerstroke engine with an amazing 798K miles on the clock. You'll be amazed, just like we were, at the condition of critical components. If you own a 7.3 PSD you need to view this video!
Click Here To See The Video!
Master Mechanic Video Repair Series Just Released...
PowerstrokeHelp.com has just released the Master Mechanic Video Repair Series, which covers both 7.3L & 6.0L Powerstroke diesel repair. See the repair procedures performed step-by-step. Learn where the trouble spots are that will cost you $$. See how we train our mechanics to fix Powerstroke's! More...
Take a FREE Tour -- CLICK HERE !
7.3L Powerstroke Performance Modifications..
Follow a step-by-step breakdown of recommended mods for your 7.3L. See the results as we dyno test after each modification with detailed results.
Click Here To See The Video!
6.0L Powerstroke Catastrophic Engine Failure…
This is our most popular video on our free side. See the cascading effect of running this engine hot. Heat is the #1 killer of the 6.0L, which over time causes component breakdown and eventually destroys the engine!
Click Here To See The Video!



Copyright © 2008-2015 POWERSTROKEHELP.COM. All Rights Reserved. Reproduction in whole or in part in any form or medium
without express written permission of POWERSTROKEHELP.COM is prohibited. Privacy & Security Policy & Terms of Use.