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post #1 of 5 Old 08-12-2011, 03:01 PM Thread Starter
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decoking intakes to cylinders???

Hey Y'all.....

Just finished tearing down my motor to the oil cooler.

Oil cooler definitely restricted, but egr cooler intact.

However, I am amazed at the amount of coking inside the intake manifold and how thick on the EGR valve. I understand why and plan on cleaning both thoroughly..


My question is....can, should, is it even necessay to clean the ports leading to the valves. Couple of pics below (3rd shows best).

If you're wondering.....new oil cooler, erg delete, and coolant filter. I plan cleaning up the EGR valve and reinstalling it to keep from throwing codes.


any advice is welcomed.....

Many Thx

PapaJahn

decoking intakes to cylinders???-img_0141.jpg

decoking intakes to cylinders???-img_0139.jpg

decoking intakes to cylinders???-img_0138.jpg

decoking intakes to cylinders???-img_0140.jpg

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post #2 of 5 Old 08-12-2011, 03:12 PM
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I used a parts washer I have out in my buddies garage and left it on overnight flowing through one side, then did the same on the other. Then it was on to the scrubbing using a "bottle brush" and carb cleaner, and then I was off to the self service car wash and used the hot water/pressure to clean it up.
You could also run it over to a machine shop and ask them to "hot tank" it for you.

As an edit: I do have to congratulate you for having the dirtiest Intake Manifold I have seen.
As far as the ports to the cylinders on the heads, I didn't touch those. I didn't want anything falling down in there. I actually recommend you put something over them, now. Even if it is only duct tape to cover those up. You REALLY don't want anything going down in there. SERIOUS engine damage could occur.

Last edited by NYC F-350; 08-12-2011 at 03:45 PM. Reason: additional info
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post #3 of 5 Old 08-12-2011, 04:09 PM Thread Starter
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Thx...will definitely cover them......

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post #4 of 5 Old 08-12-2011, 05:26 PM
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I like the hot tank. The dealership I trust with our fleet said they take the 6.0 intake manifolds and just steam pressure clean them and then air dry.

Good idea about the pressure washer at the car wash!

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post #5 of 5 Old 08-12-2011, 05:59 PM
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Quote:
Originally Posted by NYC F-350 View Post
As an edit: I do have to congratulate you for having the dirtiest Intake Manifold I have seen.
As far as the ports to the cylinders on the heads, I didn't touch those. I didn't want anything falling down in there. I actually recommend you put something over them, now. Even if it is only duct tape to cover those up. You REALLY don't want anything going down in there. SERIOUS engine damage could occur.
Thats nothing. If i had a good camera, id take pics of intakes that were so dirty and intake ports so dirty the holes were reduced to the size of a dime if not smaller.

Heres a great product i swear by-BG throttle body and intake cleaner. Its expensive per can but worth its weight in gold! it will liquify the carbon literally melt it and you can wipe it away with a cloth. When its thick like that i use a Detroit injector brush or bottle brush and scrub the big crap off first then spray it. quickest way is to hot tank everything.
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