WTF is in my oil filler neck
#1
Broken...always
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WTF is in my oil filler neck
There's this white slimey stuff all on the walls of my oil filler neck. I ran my finger through it and it looks exactly like what i'd cough up if I was sick. Its like snot. Milkey white. Engine doesnt seem to be having any problems running and oil consumption is normal.
On a side note, I have 850x4 and a strange idle that I cant really solve. My rpms bounce between 1k and 1.3k. Runs way to rich at idle, and I cant stop it with the AIC. Anyways, it revs up to 1.3, then drops for a second, then revs up, then drops. Well, right after it drops a little bit of smoke will come out the side of the oil filler neck (where I have the vent uncapped). The smoke is only there for a split second, then disapears. My coolant level is perfect and I havent touched it in 3k miles.
So, WTF.
On a side note, I have 850x4 and a strange idle that I cant really solve. My rpms bounce between 1k and 1.3k. Runs way to rich at idle, and I cant stop it with the AIC. Anyways, it revs up to 1.3, then drops for a second, then revs up, then drops. Well, right after it drops a little bit of smoke will come out the side of the oil filler neck (where I have the vent uncapped). The smoke is only there for a split second, then disapears. My coolant level is perfect and I havent touched it in 3k miles.
So, WTF.
#3
RX-7 Bad Ass
iTrader: (55)
This is totally normal. ALL RX-7's get this to some degree. It's caused by condensation mixing with oil vapors.
Even brand-new RX-8's get the milky oil cap stuff.
Dale
Even brand-new RX-8's get the milky oil cap stuff.
Dale
#4
Lives on the Forum
It's just condensation in the oil; no worries. The filler and cap is the highest point so that's where it collects.
Those of us who often drive our cars hard never see it though
Those of us who often drive our cars hard never see it though
#6
Rotary Enthusiast
do something if something was done to make it worse than normal, like no t-stat and fans always on during cool/cold weather, etc.
condensate formation is based on water included in gases bypassing the combustion seals on the rotors. short trips in cold/cool weather, where oil/engine temps stay low, increase it's white-ish formations. use oem 180F t-stat, and at least a 195F fan set point.
the PCV valve will also help reduce water vapor bulid up in the case, by purging with ambient air from the air filter, during idle and vacuum driving conditions.
condensate formation is based on water included in gases bypassing the combustion seals on the rotors. short trips in cold/cool weather, where oil/engine temps stay low, increase it's white-ish formations. use oem 180F t-stat, and at least a 195F fan set point.
the PCV valve will also help reduce water vapor bulid up in the case, by purging with ambient air from the air filter, during idle and vacuum driving conditions.
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#8
Ding King
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Originally Posted by DamonB
Those of us who often drive our cars hard never see it though
Originally Posted by KevinK2
do something if something was done to make it worse than normal, like no t-stat and fans always on during cool/cold weather, etc.
No biggie as I know it’s completely normal, just thought I would throw some more information into the thread.
Last edited by ROTARYFDTT; 10-25-04 at 07:07 PM.
#11
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Originally Posted by ROTARYFDTT
Really that’s interesting, I haven't heard that before.
#12
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Originally Posted by gotorx7
Some oils seem more susceptible to this than others, also..
I only ever had this happen with Castrol Oils..
I only ever had this happen with Castrol Oils..
#13
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Originally Posted by Gamezilla
Hrm, funny thing is its Castrol Syntec
It would be interesting to know how many other people use Castrol and suffer this, vs Other Oils...
The first time I ever saw this was years ago, on a small-block Chrysler V-8 which had been run on Castrol all it's life.. the sump was so full of sludge that it only took about two pints of oil Very extreme case though... as others have said a good long run will clear most of it up...
Last edited by gotorx7; 10-26-04 at 04:35 PM.
#14
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Originally Posted by Gamezilla
There's this white slimey stuff all on the walls of my oil filler neck. I ran my finger through it and it looks exactly like what i'd cough up if I was sick. Its like snot. Milkey white. So, WTF.
This happens to many cars besides RX-7s.
I suggest that it and the turbo gurgling sound be placed in the FAQ folder.
#15
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Originally Posted by gotorx7
It would be interesting to know how many other people use Castrol and suffer this, vs Other Oils...
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