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Join Date: Oct 2006
Location: Udora, Ontario, Canada
Posts: 21
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Oil spewing from oil tank breather
I've seen this issue in a number of treads ... but I have not seen a conclusive solution or reason for it. Could it be blow by? There must be some tired engines out there. Do they exhibit this nasty habit? Too much oil in the tank? Or is it a mystery for me to solve?
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- 67 911 coupe vin 306093 ......Not normal but its mine ... - 74 911 Targa -sold----------- Eric Jylha |
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10-11-2006, 05:29 PM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,448
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over filled or pressurized from blowby past the rings. a hole in a piston would do it too.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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10-11-2006, 06:13 PM
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Location: Udora, Ontario, Canada
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Thanks for the suggestions ... its not a hole but could very well be blow by. The engine runs reasonably well, starts well and is very responsive. I'll check the compresion and if its still ok I'll reduce the oil tank level in incremnets .... eventually I know it'll stop
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- 67 911 coupe vin 306093 ......Not normal but its mine ... - 74 911 Targa -sold----------- Eric Jylha |
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10-12-2006, 07:53 PM
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Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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Do you have a catch can or is oil just coming out of the factory breather line into the air filter housing?
Could be just normal (high) oil level in the oil tank. Your idea of lowering the level is valid, but first confirm engine integrity with a compression test. Sherwood |
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10-12-2006, 10:19 PM
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Join Date: Oct 2006
Location: Udora, Ontario, Canada
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I don't have a catch can, I don't have a factory breather either. The 'custom' filter is fitted to the hose connection on the oil filler spout. The idea of a catch can is interesting .... implying some overflow would go in this 'can'? ... When I bought the car there was nothing there ... not even a filter.
Regards
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- 67 911 coupe vin 306093 ......Not normal but its mine ... - 74 911 Targa -sold----------- Eric Jylha |
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10-13-2006, 12:27 PM
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Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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There have been several threads on this subject. High rpm operation will create more blowby pressure in the crankcase. Oil mist and unburned hydrocarbon want to exit. A catch can is a good place to separate liquid from air, but this system needs large passages and volume to decrease air velocity.
Sherwood |
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10-13-2006, 01:17 PM
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Reduce your foaming
Reduce the foaming in the tank and it will reduce the oil coming out of the breather. Dempsey touched on this in his book and it worked for me plus increased my oil pressure and decreased temperature.
The first pictures show where the nuts are located and the third photo shows the difference between the two. The part number is 901.105.361.01. the part cost about 5 dollars each..    Have fun
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Signature Phrase " CATCH ME IF YOU CAN" 1988 Porsche 930 "Squerly" Built by "Porsche Doc" -------------------------- 1974 Porsche 911 (2003 - 2012) 2000 Boxster S (2006 - 2008) Last edited by DohertyCM; 03-15-2007 at 07:56 AM.. |
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10-14-2006, 03:59 PM
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Join Date: Oct 2006
Location: Udora, Ontario, Canada
Posts: 21
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Thanks for the info. this is machine is a project for me and it is a lot of fun... I saw that in Wayne's book as well, I'll spring for the Part
and see how it helps out. Regards |
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10-14-2006, 07:23 PM
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Track Car
Squerly
