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1 more leak to go
My goal was to at least fix the oil leaks, on my 71 2.2, that went on the heat exchangers. I am so tired of looking like I’m having a BBQ in the back or transporting tar for my next roofing job. After reading everything I could on this forum.....on this subject, I’m guessing this leak is from the rocker arm guides. Am I correct, or could it be something else? The Valve cover seals appear to be dry. The picture is from the back looking forward.
Thanks, Mark The red circle is where the drop of oil is ending up. The yellow is where it seems to be leaking from. 
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Mark 1971 911E targa Priors: 1955 Speedster, 74 911 coupe, 69 911T coupe, 74 911 slant nose w/928 lights, 03 911 Turbo |
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04-07-2021, 06:40 PM
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Join Date: Sep 2008
Location: Ghent, Belgium
Posts: 281
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Oil return tubes or rocker shafts would be my guess.
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04-07-2021, 09:32 PM
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Armin
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Had the same exact spot and think it was from
Rocker arm guides. Sent from my iPhone using Tapatalk |
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04-08-2021, 05:53 AM
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Diagram
I’m trying to understand how/where it leaks if it is the rocker arm guides.
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Mark 1971 911E targa Priors: 1955 Speedster, 74 911 coupe, 69 911T coupe, 74 911 slant nose w/928 lights, 03 911 Turbo |
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04-08-2021, 06:13 AM
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Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,514
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Item 17 on the diagram is the rocker arm shaft. Oil leaks through the imperfect metal to metal seal at the two ends into the void area of the cam tower and leak along the back side of the cam tower (the flat part where it meets the heads and there is no gasket) and straight down onto the heat exchanger.
The oil return tube also leaks at the same flat area where it rubber seals have failed. Confirmation of the rocker arm shaft leaks can be done by removal of the exhaust valve cover and looking inside into the ends of the rocker arms. The oil return tube leaks is pretty obvious without any removal
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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04-08-2021, 06:22 AM
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Yelcab1,
Thanks for the explanation. I was trying to avoid putting the RSR seals in, but I guess it’s needed. I’ve seen a couple different procedures explained and few YouTube videos. Is there a certain procedure or any special tools that you recommend? Thanks, Mark
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Mark 1971 911E targa Priors: 1955 Speedster, 74 911 coupe, 69 911T coupe, 74 911 slant nose w/928 lights, 03 911 Turbo |
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04-08-2021, 06:56 AM
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Join Date: Jan 2011
Location: Gulf Coast FL
Posts: 1,484
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I'd try the easy fix first and replace just the oil return tube O-rings and see where that gets you. Going to have to do them anyway.
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04-08-2021, 09:59 AM
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