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Massive oil smoke cloud after right hand 270 degree sweepers. No other times.
Posted 07 August 2005 - 12:27 AM
My 87 GL wagon puts out a James-Bond-esque smokescreen after any 270 degree highway ramp. I normally run them in 3rd, mostly closed throttle, and when I lay into it at the end, I often literally hide the car behind me from sight. It's really bad.
However, if I repeat the same thing without a sweeper entrance ramp, nothing happens. It sounds like valve stem seals, but wouldn't those cause smoke after any long vacuum period? Also, if I take the sweepers with the engine at idle (clutch in), it doesn't smoke.
Is there any sort of crankcase vent over on the driver's side that I'd be sloshing oil into or something?
Posted 07 August 2005 - 12:51 AM
Welcome to the world of old Subarus.
I see you've got over 100 posts, so you're not totally new... but... I'll tell you one more thing to get used to about these cars: make sure you get used to the function of the switch on top of the steering column as well.
Posted 07 August 2005 - 12:54 AM
I suspect it has something to do with the PCV system. I still haven't had time to check my PCV valve to make sure it isn't clogged.
Posted 07 August 2005 - 12:58 AM
My thoughts exactly when I read the thread title.
PCV valve... Welcome to the world of old Subarus.
Posted 07 August 2005 - 01:04 AM
Posted 07 August 2005 - 12:37 PM
It is fuel injected, so I'll take a look and see if I can revise the setup as mentioned in that PDF.
I also know what the switch on the top of the steering column is for. I think I mentioned it in my "What to fix on a new old Subaru" post a while back.
I haven't been around much lately because things have been working surprisingly well, and I'm busy with work, so I don't have much time to spend posting.
Posted 09 August 2005 - 05:41 PM
Posted 09 August 2005 - 07:35 PM
Follow the hose from the driver's side valve cover to a 'T'
Follow the bottom side of the T to the back of the manifold; the PCV valve is what it runs into. The other side of the T goes to the intake tube.
IIRC, it's a 19mm wrench to remove, and I've had more luck unscrewing it from the intake manifold before I remove it from the PCV hose. The hoses are usually brittle by now, and tend to break unless removed carefully.
Posted 09 August 2005 - 09:13 PM
Is your 87 FI? Maybe this service bulletin will fix your problem. I had a huge smoke screen on my 91 Loyale. I installed this fix and the problem went away. Maybe it will help your 87 if its FI?
Posted 07 June 2006 - 03:27 PM
My 1988 GL is doing this on exactly the same thing -- sweeping right 270-degree turn descending and accelerating onto the freeway, gets a big white smoke cloud.
I understand it needs a new Subaru brand PCV valve, but maybe also a revised hose.
Need a picture or part number if anyone has either one.
Posted 07 June 2006 - 04:35 PM
Also, a silly Question: Which switch on the top of the steering column are you Talkin` About? Both my wagons got just one with a red triangle printed on it, and if is Pushed: Parkin` Lights on, if it`s Pulled: Parkin` Lights Off... it works like that all the time.
Posted 07 June 2006 - 10:28 PM
And, although I haven't tried this, Subaru used to sell (and may still) a "fix" for around $50 which basically replaces that little thin hose that runs to the back side of the intake snorkle with a regular-sized one, then plugs the little hole left in the snorkle. You could probalby do this with a couple T's, a plug, and a piece of heater hose to get the same result.
Posted 08 June 2006 - 01:40 AM
PCV Valve = Positive Crankcase Ventilation, I dont think I can give the greatest description of what it does but it pretty much allows any blowby fuel vapors in the crankcase to be sucked back in through the intake.
What button is on top of the steering column? my '81 has nothing on the column at all other than the hazards switch towards the bottom/left side of it, and my '84 has that and the tilt and ignition on the column(switching between the two cars drives me crazy, always putting the key in the wrong place ).
and lastly... rather than buying a new PCV valve, most times you should be able to clean it by soaking and then blowing all the crap out of it and have it work just like new.
Posted 08 June 2006 - 08:20 PM
Posted 10 June 2006 - 04:46 PM
I didn't know about the older thread with pictures til after that happened, thanks for the pointer. I'll print it out and take it in. Rats.
Posted 12 June 2006 - 10:30 AM
the JY. You can get the 5/8" fuel injection/emissions hose and a
second tee at most parts stores.
Posted 13 June 2006 - 01:57 AM
PCV valve is a PCV valve.
A fram one will often times still cause smoking. A subaru one will not.
I learned this from personal experience with my 87 GL.
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