Condensation Scum in intake
#27
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
Damn --another puzzle--Mazda ought to be paying us!
olddragger
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...
#30
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.
#32
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.
#39
Rotary lover
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
it cant be bad, it should help according to me
Philip
#40
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
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