SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
||||
|
||||
Intake Plenum and IRIS valve question
I have the top half of the motor apart and took the IRIS valve out today to just look. When I did that I saw nothing but crud and oil everywhere. The entire inside of the stacks, plenum even going out of the TB and even the top of the snorkel is coated with disgusting, brown, oily, crud. Any ideas what this could be coming from?
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#2
|
||||
|
||||
PCV valve....short of disabling the system, there's nothing you can really do about it.
-Bill
__________________
Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#3
|
||||
|
||||
so this is supposed to happen?
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#4
|
|||
|
|||
Quote:
If, on the other hand, what you see is vast quantities of black gloopy crud, gumming up all the parts, then that is bad. Probably you're somewhere between the two. What you are seeing is the accumulated results of 100,000+ miles of running. If the previous owner(s) maintained the car well, then it shouldn't be too bad. But if they were of the 'change the oil when the red light comes on' mentality then the accelerated bore wear, with the attendant crankcase pressurisation it causes, is going to blow vasts amounts of dirty oil mist straight into your inlet - the only possible saving grace is that in really bad cases the PCV valve will clog up and protect you In the 'bad old days', before PCV valves existed and crankcase pressure was vented directly to atmosphere, you could often see the vent pipe smoking.
__________________
I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science, whatever the matter may be. Sir William Thomson |
#5
|
||||
|
||||
Quote:
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#6
|
|||
|
|||
Quote:
On the SVX, oil vapor is also pulled into the intake by the cam cover breather hoses. dcb |
#7
|
||||
|
||||
In theory, at least, you could route all of the PCV lines to a single catch can with a breather vent on it
-Bill (thinking old school...)
__________________
Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#8
|
||||
|
||||
how hard would that be? I'm just thinking cuz I am spending time here cleaning it out and polishing and I do not want it to just go back to the way it is now.
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#9
|
|||
|
|||
It's normal to have oil residue in the intake... that's the way it's designed. If you route the breathers and PCV into a catch can, there will be no vacuum to evacuate the crankcase fumes (which probably makes no difference), and you'll be pointlessly defeating a key pollution control system, if that matters to you.
dcb |
#10
|
||||
|
||||
Global Warming??? Spend a winter up here and you will want global warming.
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#11
|
||||
|
||||
But it is seriously up in the TB and the top of the snorkel. Is that "normal" too?
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#12
|
||||
|
||||
Quote:
Shouldn't be too difficult -- check out Summit Racing for catch cans and breathers. -Bill
__________________
Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#13
|
|||
|
|||
Oil catch can.
How about the one that is built in, at the back of the block, has that plastic cover over it. The fumes are drawn in there first to remove the oil, then to the PCV valve.
Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#14
|
||||
|
||||
Quote:
__________________
Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#15
|
||||
|
||||
Quote:
Harvey, I'll have to take another look at the system....wonder if we can improve on the system (i.e. remove more of the oil?) -Bill
__________________
Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker Last edited by SVXRide; 10-24-2006 at 02:22 PM. |
|
|