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COL 911
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What causes oil leaks at cylinder head and plug fouling
1987 Carrera, 117,000 mi, stock engine. Three weeks ago I noticed a 'new' leak around the exhaust outlet on #6 cylinder. It is confirmed that it is NOT leaking from the crankcase breather hose or gasket, the oil cooler thermostat, or the oil pressure switch. Inspection of topside shows all to be dry. Weekend driver, always try to run her enough to get temps up, never tracked, by me - yet...additional info from receipts: valves adjusted at 113,000 mi, ignition wires replaced 90K mi
She doesn't leak alot of oil, but now, the engine sounds louder and initial triage by well respected local tech confirmed she was missing, and # 6 plug was fouled (brown black, oil and ash). I cleaned the engine thoroughly today a ran it abit - maybe it was my imagination, but I swear I heard 'tick-ticking' from 4-5-6. No new oil apparent on the front side #6/backside of oil cooler, so that may rule out oil cooler seals. Placing my hand near the exhaust when running I felt and heard a pop intermittently- I suppose that confirms it's missing on a least one cylinder. Can anyone suggest probable causes, could it be injector/fuel/spark related or is this a symptom that it's just my time for valve guides, etc.? Is a leakdown test recommnded as part of the estimates so I know the possbile extent of repairs? . 
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Beetle, Bimmers, Saabs, and finally...1987 Carrera Last edited by COL 911; 03-28-2010 at 02:04 PM.. Reason: clean and inspect |
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03-28-2010, 08:02 AM
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COL 911
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What causes oil leaks at cylinder head and plug fouling
Better photo, upside down (I rotated it on PC?!?!) sort of, you can see where the top of the heat exchangers are wet from oil leak at exhaust studs, also may be some leakage where cyliner head joins cylinders
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Beetle, Bimmers, Saabs, and finally...1987 Carrera Last edited by COL 911; 03-28-2010 at 02:21 PM.. Reason: change title |
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03-28-2010, 02:07 PM
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