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Registered
Join Date: Jun 2009
Posts: 745
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where can this oil leak come from?
Hi guys just rebuilt my engine and I have a few drops of oil from the red line in my picture.where can this come from?
thanks Erick 
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07-28-2015, 08:26 AM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,500
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Rocker shaft or the sealant between the heads and cam carrier.
Bruce |
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07-28-2015, 08:29 AM
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Posts: 745
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If its the rocker I will clearly see the oil once I remove the cover?
Thanks |
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07-29-2015, 04:35 AM
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Join Date: Jan 2007
Location: Maple Bay, BC Canada
Posts: 263
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Could be the return tubes, the oil will migrate to the lowest point.
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07-29-2015, 06:30 AM
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ertech,
If the rocker is leaking, yes you will see it with the valve cover removed. It will pool some oil where it should dry. Had this happen to me, ended up being a rocker shaft that was broken at the groove on the cone end.
__________________
-Dennis 1977 930 Slant, MS3 EFI, Carrera intake, Twin plug, Powerhaus headers, Magnaflow muffler, Garretson intercooler, GTX3071R |
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07-29-2015, 07:04 AM
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Join Date: Jun 2009
Posts: 745
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No oil in the lower cover rocker area
Can this come from upper cover rocker and migrate down there? Thanks |
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07-31-2015, 07:59 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,500
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Yes, its all open to the air.
Bruce |
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08-01-2015, 03:03 AM
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Registered User 4'10
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As Crg53 said, it might be the return tubes - they look ok?
cheers, jt
__________________
jt - '69 911E, PCA-RMR '75-'82; Current Other: '16 BMW 328i, '18 Subaru Forester, '09 Kawi Concours 14, '85 VW Westfalia, C172, C152; Previous Notables: '89 Goldwing (RIP), '80 Suzuki 850, '64 Ducati 250, '64 Bug (wish I'd known about that #3 exhaust valve...), '59 Austin-Healey BN100-6, '59 Impala 2-door hard-top (cool!). '49 Cushman motor scooter, Grumman AA5A & AA5B |
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08-01-2015, 07:45 AM
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Join Date: Jun 2009
Posts: 745
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The tubes and green oring are new
They look ok Thanks |
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08-01-2015, 08:09 AM
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Registered
Join Date: Jun 2009
Posts: 745
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Quick update
Rockers dont leak Can I try to tighen the cam towers? Can this help? Can the actual valve cover studs to nut leak if so what to do? Thanks |
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08-11-2015, 08:41 AM
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Registered User 4'10
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Tightening the cam towers could help if they're not torqued correctly, and/or if they weren't sealed well.
As Bruce noted, it could come from the "rocker" (valve) covers. Did you ck them for flatness (mine were off by almost .012" between some of the stud holes!), and proper torque (only "5.9" ft-lbs). If they're not pretty flat, you don't want to rely on the gasket to take up the slack. And, if that's all they were torqued to, it's ok to snug them up a tad if they're slightly leaking... Have you got Wayne's rebuild book? It's got all these details in it... cheers, jt |
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08-11-2015, 09:09 AM
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