![]() |
|
|
|
Registered
Join Date: Oct 2015
Location: Knoxville Tn
Posts: 44
|
Common problem
First off, sorry for the generic post description. Porsche 3.2. 88 model Carrera. Car has about 110k (speedo gear stripped). My last post here was about excessive smoking. My first guess was worn valve guides and I was crying the blues and getting ready to do a top end rebuild. I didn't really want to because the car is my daily for the last 2 years! Anyway,...I changed my mind when the car stopped smoking and remained running well. Tonight, I was just looking for something to do and decided to top off the oil. It's only using maybe 1/2 a quart every 1200-1500k, but as soon as I get the oil level correct. Warm, car running, correct level on the dipstick and lucky enough to have my gauge in the car correct too,... then it starts doing the smoke again. I can get it to blow smoke after this if I rev to about 4500 and let off. Or...under load just driving normally and coming to a stop. So....My question is,.....is this still valve guide wear? Has anyone dealt with this and it been something else? Thanks ASAP, the car is running in the driveway.
__________________
Cordell. 88 Carrera sunroof. Last edited by Junkbone; 09-09-2017 at 05:30 PM.. |
||
![]() |
|
Registered
|
Many of us run the oil a little lower on the dipstick just because it seems like less oil gets sucked in to the intake.
__________________
Rutager West 1977 911S Targa Chocolate Brown |
||
![]() |
|
Registered
Join Date: Oct 2015
Location: Knoxville Tn
Posts: 44
|
Thanks rwest. I'm hoping that's it. Just looking for others to verify. As long as I run the oil where it's just about an 1/8 of an inch on the dipstick, it runs like a champ but the oil gauge in the car stays in the red. If I fill to the halfway point or above on the dipstick, the gauge in the car reads right in the middle at idle,..but then the smoking issue starts.
__________________
Cordell. 88 Carrera sunroof. |
||
![]() |
|
Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
|
That is where I keep my oil level, just the bottom of the dipstick. That is plenty of oil.
Not sure why you are having the smoking issue. Might be somthing to do with your oil tank venting system. Your guides would have to be really worn for them to cause much smoking. Your oil consumption would be much worse with really worn guides. Worn guides will also cause noisy valves.
__________________
Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
||
![]() |
|
Registered
Join Date: Oct 2015
Location: Knoxville Tn
Posts: 44
|
Trackrash. Thanks. that is what I'm leaning towards too. It just feels good to have other 3.2 owners to chime in and say "don't sweat it". I really don't need to have to tear this thing down right now. With that said, I've made it my daily and it's been one of the most reliable cars I've ever had!
__________________
Cordell. 88 Carrera sunroof. |
||
![]() |
|
Dial 911
|
Hi...Our '86 Carrera has 125K km on it -> 77.5K miles...It will smoke if overfilled, such as by a half a quart... Like others have mentioned, when doing an oil change, if I put the correct amount in - 10.5 US quarts - 9.9 litres, it will use a litre within say 600 km - 375 miles, so I only put 9 litres - 9.5 US quarts in during an oil change... I tend to keep the oil level around the middle of the dip stick; I then get, on an average, 1200 km -> 725 miles which is well within limits of what Porsche states for the 3.2's.
Note: The 84-87 911 Carrera technical specifications handbook (factory publication) notes that the oil consumption should be approx. 1.5 litres for every 1000 km (1.59 quarts every 621 miles).
__________________
Cheers! “Simplicity is the ultimate sophistication.” Leonardo Da Vinci Last edited by A horse with no name; 09-10-2017 at 12:21 AM.. |
||
![]() |
|
![]() |
Registered
Join Date: Oct 2015
Location: Knoxville Tn
Posts: 44
|
Thanks. I have made the mistake of over filling also and it does start smoking right away. It seems as though just a half quart of oil more or less makes a critical difference as far as this problem goes.
__________________
Cordell. 88 Carrera sunroof. |
||
![]() |
|
Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
|
![]() ![]() Do you have the restrictor installed? Seen a few cars where it's missing.
__________________
Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
||
![]() |
|
Registered
Join Date: Oct 2015
Location: Knoxville Tn
Posts: 44
|
Hmm. I honestly have no idea. Never new it existed. I'll have to do a little homework...
__________________
Cordell. 88 Carrera sunroof. |
||
![]() |
|
Registered
|
I'm also curious to what the restrictor is and where it goes? Steve
|
||
![]() |
|
Dial 911
|
Quote:
oil breather hose restrictor - idle issue update
__________________
Cheers! “Simplicity is the ultimate sophistication.” Leonardo Da Vinci |
||
![]() |
|
Registered
|
How or why would the restrictor help with smoking? Thanks Steve
|
||
![]() |
|
Dial 911
|
Quote:
Hi...I somehow don't think that it does...If there is too much oil in the system, the engine is then able to suck some of the overfill from the tank through the hose to the intake... I also think that even if there wasn't a restictor in the hose, the same thing would happen... I stand to be corrected of course.
__________________
Cheers! “Simplicity is the ultimate sophistication.” Leonardo Da Vinci Last edited by A horse with no name; 09-11-2017 at 09:36 PM.. |
||
![]() |
|
Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
|
The restrictor allows you to check the oil level dipstick with a running motor without the engine dying. Don't know which models need it, but
a car with a MAF flapper unit sure does (Carrera and 964) But something strange, I replaced the MAF flapper with an actual modern Mass Airflow unit, and it no longer needs the restrictor when checking oil while running. Go figure.
__________________
'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
||
![]() |
|
Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
|
I'm not a Carrera guy but it did seem to do a good job regarding smoke on my buddies 85. He was ready to tear engine down for guides when he thought he'd try restrictor. Probably also helps to keep oil halfway between marks or less.
__________________
Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
||
![]() |
|
Registered
|
smoke
Rothport invented a valve that is mounted on the S hose between the oil tank and the engine. it prevents the oil migrating from the oil tank to the engine once the motor is shut down and eliminates smoke...
it is expensive but seems to work. I mounted one... |
||
![]() |
|
Coram Deo
|
Quote:
The PET shows this part starting in 1981. Any concerns mounting it on older cars?
__________________
Dru 1980 911SC Targa • Petrol Blue Metallic • Cork special leather • Sport Seats • Limited Slip • 964 Cams • SSIs • Rennshifter • 1990 250D Opawagen • 1995 E220T Sportline Familienwagen • 1971 280SE Beverly... hills that is • 1971 Berlina 1750 Faggio • |
||
![]() |
|
Registered
|
smoke
You should call Rothport engineering??? and consult with them
|
||
![]() |
|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
|
The restrictor was needed on the SC when the tank was vented into the throttle body.
77 was the last of the curly hose going into the air cleaner. Was replaced in 78. All SCs stumble with the oil tank opened. Sometimes I have seen the restrictor installed in the filler neck. Usually, installed in the hose a couple inches in. Bruce |
||
![]() |
|
Dial 911
|
![]()
__________________
Cheers! “Simplicity is the ultimate sophistication.” Leonardo Da Vinci |
||
![]() |
|