found oil in my air filter box.
06-01-2006, 01:43 PM
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found oil in my air filter box.
Ever since I changed my clutch about 8 months ago, I have noticed motor oil in my J-boot and air filter box. At first I thought that it could have been the oils from the k/n filter that leaked and got sucked in by the J-boot, but since i find oil inside of there everytime i check it, im thinking its something serious. Im sure it has little to do with the clutch, but it was at that time when i noticed this problem.
Car: '89 944 n/a
THe car runs good and smooth, so I don't know what this issue can be. Does anyone know whats wrong with my car or what happened?? and how it can be fixed???
_______________________________________________
_______________________________________________
Jevan Leaño
Red 89 944 na/turbo clone, 931 hood
Car: '89 944 n/a
THe car runs good and smooth, so I don't know what this issue can be. Does anyone know whats wrong with my car or what happened?? and how it can be fixed???
_______________________________________________
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Jevan Leaño
Red 89 944 na/turbo clone, 931 hood
06-01-2006, 01:57 PM
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Could just be blow-by. Not sure about the 944's but early 928's vented the blow by into the intake right below the air filter - causing the filter to build up oil deposits over time. Later cars the vented air goes directly into the TB to be burned.
06-01-2006, 02:05 PM
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At least it wasn't in your cat litter box. 
Isn't there a crankcase ventilation tube to the air box? That could easily explain it. If not, you may have oil getting in the belt covers (not a good thing).
Isn't there a crankcase ventilation tube to the air box? That could easily explain it. If not, you may have oil getting in the belt covers (not a good thing).
06-01-2006, 02:49 PM
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i have the same problem with my 86 944 i had talked with the guys here about it, one of them suggested putting a catch can on. im not sure about the differences about my 2.5 and your 2.7, but the aos, is from what i understand porsches version of a pcv valve. i cant remember what excatly what the guys had told me, so id do a search for "aos" that may lead u to an answer. when i took the airbox out i did not have any oil in it whatsoever, the boot a a slight coating, the throttlebody and throttle plate were caked in ****!
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06-01-2006, 10:58 PM
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not that easy if he has an aos, i dont know anything about 2.7's but if they are anything like the 2.5's u gotta follow the filler tube down to where it hooks up to the engine then replace a few o-rings. there are also two hoses that run to the j boot. thats where the oil is coming from. if u have small drops of oil just about directly below the master cylinder chances are its the aos rings. if u havent checked out clarks garage i suggest u do- Clarks-Garage.com
just keep asking questions, hell thats where ive gotten all the info
just keep asking questions, hell thats where ive gotten all the info
06-02-2006, 12:18 AM
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the two o-rings that seal the black oil filler neck (which also serves as an air/oil separator) to the block are bad. the vacuum from the motor is sucking air past those o-rings and bringing oil mist from the air/oil separator up to the intake boot and also into your airbox.
the problem is not due to worn out piston rings, so don't worry about that.
the problem is not due to worn out piston rings, so don't worry about that.
06-02-2006, 03:54 AM
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arent there three rings? consequences- oil pooling in j boot for one. then ur tb gets coated in oil/sludge. how it got into that guys airbox is weird though...there are the two hoses from the aos and they run to the j boot, the only hose that runs to the airbox is on the airbox cover, that runs down, somewhere, cant remember where its hooked to now. i have heard that the k&n filters screw up the maf, but i had one in my previous car and didnt notice any problems...the o-rigns are about 5$ for both sets at pelican.
06-02-2006, 04:18 AM
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the consequences: increased oil "consumption", too much oil being burned by the engine, oil covering the intake boot, AFM, intake manifold, and air box.
There is only one hose from the aos to the j-boot. The hose that connects to the air box usually goes down and connects to the timing belt cover, however there is a TSB to delete this hose and plug the airbox.
There is only one hose from the aos to the j-boot. The hose that connects to the air box usually goes down and connects to the timing belt cover, however there is a TSB to delete this hose and plug the airbox.
06-02-2006, 09:18 AM
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I had the same problem - clean engine oil - discovered that if I add oil too fast it fills the oil sep tube and then runs via on of the pipes underneath the manifold to the airbox. Filling the engine oil at a slower pace solved the mystery.