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Oil leak between Lt Head and chain tensioner housing
I have an oil leak that seems to be coming down from the rear of the left head and the back of the chain tensioner housing. Any guesses where this might be coming from?
I already replaced the washer on the chain tensioner oil supply line and it appears to be dry. I had put on new upper and lower valve cover gaskets, and it seemed to be dry around the valve covers. I also planed the covers flat before re-installing them...they appeared to be flat and true Picture is the drivers side looking up. The cast aluminum is the back of the left head. 
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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 Last edited by mhurwitz; 04-03-2021 at 03:03 PM.. |
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04-03-2021, 02:54 PM
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Looks like the rocker shaft is leaking. Does it have the RSR seals?
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04-03-2021, 06:22 PM
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If it's the back of the chain casing then it's the camshaft seal between the chain casing and camshaft housing. I did this job 18 months' ago. It's a tricky job as it involves removing the camshaft nut. I bought the Stomski tool for the job, so much better than the crow's foot tool. Parts are no more than about $60 but the labour element is what costs.
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1959 Bristol 406 (bought in 1972; sold in 1977) 1966 Porsche 2.0 coupe (bought in 1977; sold 1981) 1978 Porsche SC coupe (bought in 1993) |
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04-04-2021, 02:08 AM
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JSV and Dannobee,
Thanks for the input. Sounds like it would be prudent to do both procedures.....but I think I’ll wait until the motor is out for it’s rebuild. It’s frustrating because I tried to fix all the oil leaks....especially the ones that went onto the heat exchangers. I’m so tired of smelling burning oil. 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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04-04-2021, 06:08 AM
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04-04-2021, 06:59 AM
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Quote:
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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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04-04-2021, 07:02 AM
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Quote:
I probably should have included a photo that was more panned out also. You would really have to be familiar with the motor to tell just by that photo.
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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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04-04-2021, 07:05 AM
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Location: San Carlos, CA US
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There are only 3 places it can leak from there: 1) cam housing seal, 2) expoxy for the timing chain stud, and 3) rocker arm.
When the engine is out, do them all.
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04-04-2021, 10:06 AM
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Quote:
Look closely at the grime in the very upper left hand portion of the pic. The most common cause is a leaking rocker shaft. |
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04-04-2021, 10:57 AM
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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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04-04-2021, 12:42 PM
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Porsche
Porsche
