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Join Date: Jun 2007
Location: San Angelo, Texas
Posts: 412
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N/A Engine Questions
Had a few question about my car?
1. What would cause the intake and J Boot to have oil in it? Everythign is hooked up. 2. Sea Foam, looking to put some in my oil to clean it, how long can I keep it in before needing to change the oil? 3. Got a small Idle flux, Vacc system is good, along with good fuel and ignition system, suggestions.
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I Love the Smell of Jet Fuel in the Morning! 86 Silver Porsche 944 N/A - Alpine CDA-9857 KYB Front, Weltmeister 250lb springs, MSD Master Blaster Coil, K&N Cone Filter, Blue LED Dash, Clock and Defrost Upgrade http://www.c28.com/?adid=st&iid=25349 |
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05-16-2008, 11:13 AM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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Let's start with the Sea Foam... I wouldn't run it for longer than 200-300 miles if you are adding it to a 5w or 10w oil. While it is a great detergent to add to your oil, it will lower the overall viscosity.
Your idle issue and oil in the j-boot may be the same issue. I would look into the seals in the oil-air separator. when these go out, you will start to see oil deposits in the j-boot as you have mentioned, which could also be causing a slight "hunt" to your idle. Hope it helps! -Nick
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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05-16-2008, 11:56 AM
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Join Date: Feb 2008
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could that cause oil in the air box as well?
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dolor et pavor Copyright |
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05-16-2008, 07:02 PM
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Location: Vinegrove Ky
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Quote:
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1987, 944S (168,000 miles)..sold 1986, 944na. My job is a hobby. My 944's are work. |
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05-17-2008, 03:42 AM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
Posts: 8,889
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It depends upon 'how much oil'. More than likely the AOS has failed and needs to be replace. I've just done this myself as I had the same problem. Like me you'll probably find oil dripping from every vacuum hose and burnt oil caked inside your inlet manifold (have fun cleaning that). The oil makes the hoses go hard and brittle. If they are, you'll need to replace these also. if you go genuine with all the parts (if you can find non genuine formed hoses...let everyone know), it'll cost about $500 (the new AOS is around $200). It's not a difficult job to do.
Cheers, Jeff
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Jeff 83 944 Guards Red 23 718 GT Silver |
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05-17-2008, 04:47 AM
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or, you could have just overfilled the oil
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Mike - CFI, A&P Mechanic w/ I.A., Aztec driver at Island Tyme '88 951S - zermatt silber/black - staying stock. purchased in 11-2006 '84 944 - gemini grau/tan+brown - lightly modified. purchased in 11-2001 2021 Tesla Y - to get me to work |
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05-17-2008, 06:10 AM
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What would cause oil in the intake/airbox if the AOS seals were just replaced?
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05-17-2008, 12:38 PM
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Location: south Africa
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clean oil in the airbox = filling oil to quickly.
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1983 944 RHD Original. Uses all my spare cash! 1947 Morris Sold 1972 Benz Sold 1975 Benz Sold 1976 Benz Sold 1977 Benz Sold |
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05-17-2008, 12:40 PM
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It's an oil/water mixture, the water probably coming from successive small trips in the car. This is a pretty good amount of oil in the J-boot, and some misty oil in the AFM. How does filling the oil too quickly lead to oil in the airbox?
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05-17-2008, 01:01 PM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
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Quote:
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Jeff 83 944 Guards Red 23 718 GT Silver |
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05-17-2008, 08:24 PM
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Join Date: Nov 2004
Location: ronkonkoma ny 11779
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a worn engine or "blowby" can cause this also, do a compression check
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83 944....bye bye 85.5 euro spec 944, 5sp (she's gone....  74 914...hasta LA Vista baby 87 924s....don't let the door hit ya 68 912.......see ya! |
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05-18-2008, 05:40 AM
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compression test shows "green" or what was considered minimal blowby, the rings still good. Any other thoughts that would put oil in the intake?
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05-18-2008, 01:50 PM
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Location: ronkonkoma ny 11779
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valve guides? what kind of mileage do you have, does the vacuum fluctuate?
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83 944....bye bye 85.5 euro spec 944, 5sp (she's gone.... 74 914...hasta LA Vista baby 87 924s....don't let the door hit ya 68 912.......see ya! |
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05-18-2008, 04:51 PM
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Location: San Angelo, Texas
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Wanted to leave an update. Well ended up changing out the intake to my old intake. and the problem went away. Been several months and have had no issues with oil in the system. Not sure if something was wrong with the intake, or if I crossed something hooking it back up. Now if I can jsut get the electical problems fixed!
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I Love the Smell of Jet Fuel in the Morning! 86 Silver Porsche 944 N/A - Alpine CDA-9857 KYB Front, Weltmeister 250lb springs, MSD Master Blaster Coil, K&N Cone Filter, Blue LED Dash, Clock and Defrost Upgrade http://www.c28.com/?adid=st&iid=25349 |
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09-17-2008, 04:48 PM
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Grey car
Turbo
1986 Porsche 944 2.5L N/A
