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Condensation Scum in intake

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Old 12-29-2006, 06:24 PM
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Kevin .....I can send you larger ones...but they aren't great....they are camera phone pics
Old 12-29-2006, 06:29 PM
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Originally Posted by olddragger
Well it seems as I too am infected with the gummy stuff. I dont know how much is in the neck but a quick diagnostic plunge with a piece of reliable wire revealed the snot stuff all over it. Now question is where the hell is this coming from? My engine runs better than it ever has. So no symptoms. Its the same stuff that used to be on the oil level stick.
Damn --another puzzle--Mazda ought to be paying us!
olddragger
It's definitly condensation mixed with oil.......There is a perfect "still" in the area under the intake that this sits....the engine is warm...and the cooler ambient air is around the outside. Any condensation seems to sit in the flat area. I was shocked at how much crap came out.......the pictures show only what was stick to the walls.....I dumpted out considerable free water/goop mixture as well.

The area of the inside of the filler tube.....coupled with what I dumped out..there is over a cup of that crap in there...
Old 12-29-2006, 09:13 PM
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Dang dude--i may get sick doing this. That tube is easy to remove isn't it?
OD
Old 12-29-2006, 09:16 PM
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Look at the TSB for "dipstick frothaccino" and it willl show you. You need to remove black plastic part of the intake..and a few hoses..... The o-ring gaskets on the intake might need to be replaced if you pull it....but they should be OK.
Old 12-29-2006, 09:35 PM
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I have pulled my UIM many times and I have it down to less than 30 minutes to R+R it now, and I have been able to re-use the o-rings over and over. Just don't get any oil or other chemicals on them or they might swell up. The tool to have to get the most difficult "screws"(as they are called) off is a 3/8" drive u-joint to use with the 10mm socket. The rest is easy.
Old 12-30-2006, 02:33 AM
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The only hard ones are between the manifold and the firewall. Like Charles said...A u-joint on a long extension will get at them.

The seals should be OK they are like oval shaped -o-rings and are quite substantial......
Old 12-30-2006, 09:01 AM
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I forgot to mention the extension but another important point is the torque value of the screws. I cannot remember what the service manual says, and I haven't looked the value up either, but the screws don't require much torque when re-installing the UIM. The screws thread into the aluminum so make sure not to cross-thread them by hand-threading them as far as you can, them gradually bring them all up to torque evenly. With o-rings sealing both pieces of the manifold and the oil filler pipe it doesn't take much.
Old 12-30-2006, 06:12 PM
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well dont gross out but i sucked some out toniight. small vinyl tube --rammed it down there and got a good bit out. now when i insert (approx 18" or so) it comes back clean. let the jokes begin.
olddragger
Old 12-30-2006, 07:47 PM
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Southern hospitality?
Old 12-31-2006, 11:08 AM
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OD --
Tell me you did not learn how to do the tube thingy from your profession.....
Old 12-31-2006, 11:37 AM
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So, should we officially call this stuff, "tube cheese"? LOL
Old 12-31-2006, 12:29 PM
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Gives me a whole new respect for my coronary arteries ....gotta get off the couch and increase the revs ........
Old 12-31-2006, 01:15 PM
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switch to synthetic oil for your fried foods
Old 12-31-2006, 02:13 PM
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Wont a catch can inbetween the pipe from oil fill tube and the intake help to prevent some of this, catching a bit more of the snotty stuff, or condensation?

it cant be bad, it should help according to me

Philip
Old 12-31-2006, 02:21 PM
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I think the crud happens because the venting is inadequate...a catch can won't help that. The condensation forms in that area cause the fill tube is the highest point of the "crankcase" system that is poorly vented. I think the fix that they have done...ie: using engine Vac to vent the area and burn it off makes sense.....it won't allow buildup of vapors in that area like the old system. As I mentioned before....it was like a big still.....a nice cool outside chanber with hot warm gasses on the inside. No wonder that it condensed water like it did
Old 12-31-2006, 03:36 PM
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Good points, both Phil and Dan...
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