6.7L EGR Cleaning Kit

6.7L EGR Cleaning Kit
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“Perform Service” at 67,500 miles
Let’s break the service down into its three components:
Part 1: Change the crankcase vent (CCV) filter
Part 2: Remove and clean the exhaust gas recirculation (EGR) valve
Part 3: Remove and clean the EGR cooler assembly.
Part 1: Change the CCV Filter
The first service item, change the CCV filter, is very easy to do. The instructions were covered in the
Turbo Diesel Register, specifically Issue 64, page 40.
In an effort to do a comprehensive 67,500 mile service article, this is what we found:
The CCV sits on top of the valve cover and, from what looks like last minute entry in the ‘07.5
Owners Manual, it requires inspection and/or changing every 67,500 miles. Furthermore, should the
crankcase vent system become clogged there are diagnostic trouble codes (DTCs for the uninitiated)
that will be set causing a malfunction indicator light (MIL for the uninitiated) to come on. Specifically the DTCs for CCV problems are: P1507 crankcase filter restriction; P1508 crankcase filter
restriction—replaces filter. If these codes are set the “Perform Service” message will illuminate on
the overhead display.
Likewise, at the 67,500 mile interval the “Perform Service” will automatically illuminate alerting
you to check and clean the EGR valve, EGR cooler and to replace the CCV filter.
How do you change the CCV? The inspection and/or change of the filter is very easy. The steps:
• Remove the four 8mm bolts that hold the “batwing” cover in place. Remove the dipstick and then the cover.
• Remove the oil drain hose from the passenger side of the CCV filter. As you inspect the hose you should find that there is very
little oil that makes it this far into the vent system.
• Remove the eight 8mm bolts that hold the CCV filter in place.
Removing the eight 8mm bolts that hold the CCV filter in place. DO NOT use the impact tool to reassemble and tighten the bolts.
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If you need more assistance, we are only a phone call away.
(770) 886-2500
Monday–Friday
8:30am–5:30pm EST
GENO’S GARAGE, INC.
1150 Samples Industrial Drive
Cumming, Georgia 30041
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“Perform Service” at 67,500 miles
• Remove the oil fill cap. For protection from debris, stuff a paper towel into the oil fill hole.
• With a large flat blade screwdriver, gently pry the CCV filter up and off.
• Upon inspection of the CCV filter, you’ll see that it has two O-rings and a reusable V-gasket that effectively seal the filter in place.
New CCV filter on the left. At 30,000 miles the CCV filter on the right looked clean and was reinstalled.
• Replace the CCV filter.
• Reassemble in reverse order.
Oops…wait one minute, we’re not quite finished. How do you reset the “Perform Service” reminder
that is now illuminated on your overhead display?
The procedure is outlined in your Owner’s Manual and it is written as follows:
• Turn the ignition switch to the ON position. (Do not start the engine.)
• Press and release the brake pedal two times.
• Fully depress the accelerator pedal slowly two times within 10 seconds.
• Turn the ignition switch to the OFF/LOCK position.
The message should now be erased. You can also do your favorite dance afterward!
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“Perform Service” at 67,500 miles
Part 2: Clean the EGR Valve
This service procedure is almost as easy as Part 1, changing the CCV filter. Let’s pick up the instructions from the part where you have removed the dipstick and then the four 8mm bolts that hold the
“batwing” in place.
• Remove the three 10mm bolts that hold the dipstick bracket in place.
• Next up, remove the electrical connector that goes to the EGR valve. With a small pick move/slide the red clip out allowing
you to pinch the tang down to release the connector.
• Next remove the four 10mm bolts that hold the EGR valve in place. The bolts and the EGR valve can be removed. Lift the EGR
valve off of the intake horn and it is ready for cleaning.
• Remove the four Phillips head screws that hold the valve motor to the EGR assembly. Lift the valve motor off.
Several shops that we’ve talked to suggested that you start the EGR valve cleaning process by blowing the carbon off of the EGR valve with regulated compressed air. Start at 10psi and increase the
pressure as the dust flys—and the dust will fly. Your blowing should be done in the wide open spaces
or, better yet, blow into an old shop vacuum that you no longer care about.
With the focus on saving you money, we wanted to test the effectiveness of the Mopar cleaner as
compared to Simple Green cleaner. We poured two quarts of the Mopar fluid into a five-gallon bucket. Ditto with with Simple Green. The suggested concentration is 4 parts water to 1 part solution; the
suggested soak time is 2 hours. Based on tips that we received from service shops, we suggest a 2-to1 concentration and an overnight soak.
Upon removal of parts in the different solutions, the Mopar and Simple Green, we could not tell any
real difference. Both solutions did a good job of clean-up.
• Drop the EGR housing and valve into the cleaning solution for an overnight soak.
• Remove and do a preliminary clean-up with a toothbrush.
For complete cleaning you’ll want to disassemble the EGR valve from the housing. The
procedure is as follows:
• Using your fingers, a screwdriver or a socket, press down
on the valve spring retainer.
• With the retainer pressed completely down the valve
keepers should release from the valve. A light tap with a
screwdriver or magnetic pick up tool may be needed.
• Remove the retainer and keepers.
• The valve can now move freely. Clean the valve and the
valve seats. We used a toothbrush and a Scotchbrite pad
for cleaning.
• Reassemble the EGR valve. The valve motor is not
indexed. Reassemble it so that its connector is pointed
towards the front of the truck.
• Reassemble the EGR valve back onto the air intake.
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“Perform Service” at 67,500 miles
Part 3: Remove and Clean the EGR Cooler
Unlike parts 1 and 2, this service procedure is cumbersome and time consuming. Notice we did not
say “difficult,” as the procedure is nothing more than removing and reinstalling parts. There is no
heavy lifting; precise measuring or alignment; or machine work/outside services for which you have
to wait. However, if you look at this procedure in the TDR-o-pedia it exemplifies and gives definition
to the word cumbersome.
How so?
Here are some examples: Hidden nuts and bolts that you can’t see, nuts and bolts that are difficult
to access; nuts and bolts that require removal of other parts (air cleaner assembly) to access; special
flexible tools that you’ll need to get into the aforementioned tight and awkward locations.
All right, you’ve been sufficiently warned that the procedure is cumbersome, but not necessarily
difficult. Here are some general instructions with tips for easier disassembly.
Our task is to remove and clean the EGR cooler assembly.
This is the “before” picture.
This is the “after” picture showing the EGR cooler
assembly removed from the exhaust manifold.
• For easier access to the exhaust manifold we started the
project by removing the air snorkel that comes from the airbox
to the turbocharger inlet. To remove the snorkel you need to
disconnect the two sensors, loosen the hose clamps and
disconnect the crankcase vent line that goes into the snorkel.
To prevent debris from entering the turbocharger, stuff a clean
rag into the turbocharger inlet.
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“Perform Service” at 67,500 miles
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•M
oving to the passenger side of the engine, remove the 11mm
nut from the clamp that holds the EGR cooler assembly to the
exhaust gas crossover pipe.
• Remove the 8mm bolt at the front of the engine that holds
the crossover pipe in place. Removing this bolt loosens the
crossover pipe giving you room to wiggle the pipe to an
out-of-the-way location.
1
2
• There is a heat shield above the EGR servo control valve.
Remove these two 10mm nuts (#1 and #2) hold the heat
shield in place. These two bolts also hold the butterfly
onto the 90° elbow.
1
4
•R
emove the top two 10mm bolts (#1 and #2) that hold the
cast iron butterfly housing to the 90° elbow.
2
•R
emove the bottom two 10mm bolts (#3 and #4) that hold the
cast iron butterfly housing to the 90° elbow.
3
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“Perform Service” at 67,500 miles
3
2
4
1
• Remove the four 10mm bolts that hold the servo motor plate to the cast iron butterfly/flex pipe assembly.
• Loosen the 11mm bolt on the V-clamp. Remove the clamp and the cast iron butterfly/flexpipe to be separated from the EGR cooler.
• Remove two 15mm bolts in order to remove the
butterfly/flexpipe from the exhaust manifold.
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“Perform Service” at 67,500 miles
• There are several 10mm bolts that hold the front coolant
tube to the cooler assembly. Remove the bolts and the
coolant tube can be pulled backward from the O-ringed
nipple that goes into the cooler assembly. Catch the coolant
in a paper cup.
2
1
3
• Remove the four 10mm bolts that hold the EGR cooler
to the manifold plate.
4
• Remove the remaining 10mm bolt that holds the coolant
tube to the side of the manifold plate (see arrow).
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“Perform Service” at 67,500 miles
• Now that the coolant tube is completely loose. Pull the tube
up off of the vertical fitting that is on the cylinder head.
• Remove the CCV hose from over the EGR cooler.
• Remove two 15mm nuts that hold the EGR cooler onto the
exhaust manifold. Yes, these are hard to reach.
• Lift the cooler off of the exhaust manifold.
Continued on Next Page 
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“Perform Service” at 67,500 miles
• Remove the rear coolant hose from the EGR cooler. Drain the
remaining coolant from the EGR Cooler.
Vacuum cleaner
inlet hose.
• With carefully regulated compressed air you can blow
carbon into the inlet hose of a vacuum cleaner.
Tape seals
compressed
air hose to
EGR Cooler.
• Plug one end of the cooler with a rubber plug and fill with hot
water and cleaning solution. Plug the other end and soak
overnight.
Now that the cooler has been removed it is time for the overnight soak. To save cleaning solution and
the associated messy waste, we have supplied two rubber plugs that fit into the cooler openings. Plug
the cooler at both ends; fill it up the solution and hot water; shake it like you would a paint can; and
allow it to sit overnight.
The next morning remove the cooler and cleaned inside as best that you can. A further trip to the
local pressure washer facility with the cooler and a bit of left-over solution will make sure that it is
really clean. For good housekeeping take the crossover pipe and other associated EGR hardware for
cleaning. Do a final blow-out with compressed air.
Reassemble the cooler to the exhaust manifold.
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“Perform Service” at 67,500 miles
The kit includes the parts labeled with numbered black boxes.
2
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“Perform Service” at 67,500 miles
27
29
16
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32
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www.genosgarage.com
“Perform Service” at 67,500 miles
5266801
(3) 3949910
4933225
4933223
(2) 3979769
9545K23
9545K21
5264566
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