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  #1  
Old 08-26-2005, 10:39 PM
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Location: Boston, MA
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603 engine intake manifold cleaner

I can't remember where I read this many months ago, but I know there is an effective method for cleaning the black sludge/grime from the intake-to-exhaust/turbo manifold crossover pipe. It's a squarish aluminum pipe that crosses over the valve cover. Once cleaned, the performance is a little better. I did a search just now but didn't see anything. I think someone wrote they submersed the entire pipe in either Simple Green overnight or maybe it was lacquer thinner... I don't remember. Whatever it was it really worked since the pipe looked like new.
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Old 08-26-2005, 11:23 PM
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Location: around Charlotte NC
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I used an "intake cleaner"

Boston,

I did my old SDL a couple of years ago. I found - I believe - a Gunk or STP brand spray can marked "intake manifold cleaner". My intake wasn't bad, 1/8" or less all around. This stuff cleaned that out very well. I used 2 cans for the cross-over and intake.

In general, I would think there is much excess air available coming from the turbo and intake in this diesel. This is different than a gas engine that is usually air limited. It doesn't hurt to clean it but I wouldn't expect a difference unless you have a very large build up.

Chuck
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Old 08-28-2005, 01:07 AM
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Castrol purple cleaner

I just found a bottle of Castrol purple cleaner that comes in a spray bottle. That stuff is amazing. I sprayed it on directly to the oil/gunk and it melted the grime away. No scrubbing needed, only wiped it with a paper towel. That stuff's amazing. I think it said on the bottle that it "creates an environment too slippery for oil or grease to cling to". Damn.
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Old 08-28-2005, 07:32 AM
Tangent
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purple cleaner

you can get the same stuff with a different name for half the price at Wal-Mart
itís called Purple Power
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Old 08-28-2005, 01:24 PM
BusyBenz
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You'd also be surprised to see what has formed around the intake valve stems after you remove the intake manifold and have a look-see. This is an area that will restrict air-flow and performance.

You can only clean in and around each valve while it is closed, don't want chunks of debris falling into the chamber.
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Old 08-28-2005, 04:56 PM
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Quote:
Originally Posted by BusyBenz
...don't want chunks of debris falling into the chamber.
One of the theories behind 603.97 rod bending.

Sixto
95 S420
87 300SDL
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