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Showing results for tags 'oil leak cylinder head'.
Found 1 result
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Having a problem with sudden massive oil loss on my 01 996 C2 (86k original miles) . Here some of the background. it is ca. 900miles since IMS/RMS replacement. Perfectly runing car, no codes, no leaks. Since I am new to 911, I was wondering about oil consuption - which was ca. 2 quarts (I thought my Cayenne CTTS consumes plenty of oil (>1Qt/1K is normal)) , but to my surprize, from discussions with local fellows with air cooled 911's , I can expect a quart / gas tank on a carrera engine ) . So I thought a quart / 450 miles (about two tanks) is not unusual. I also noticed no leaks under the car at any time. What I was concerned , however, was about the recommendation to use the M1 5W-40 diesel truck oil (Which I used since the IMS/RMS work). Reading through misc oil threads, I ended up w/o a clear direction (except to do it 5k or less intervals) , and decided to try what Porsche recommends - and this is 10W-40 for the climate I am in - with 50-60F. So, I swapped the M1 5W-40 dt oil after less than 1k miles for M1 10W40 high mileage oil. The dip stick showed max./ the dashboard gauge was in middle . The car ran perfectly fine for ca. 50 miles (a day commute to office). This afternoon I drove the car slowly for about 10 min (just to local store a few miles away) and once back home I parked the car curbside for about an hour. Then , while parking the car backwards on driveway , to my surprise I saw a major oil puddle of ca. 4 sft caught my attention just below where the engine was sittiong above the last hour. Double-checking driveway shows not the slightest signs that this could have started before I started the car today less than an hour ago. Backing up the car onto garage (engine does no unusueal sounds while doing so ) , and checking oil-level. The dashboard shows 2 bars above min (which is about one less since I filled up last). Dipstick, however, shows barely above min. Checking the floor, I see the oil dropping from rear cross bar. Jacked the car rear up and identified that all is perfectly dry around Trans Bell-housing (my first concern, but it confirms to me RMS/IMSB area is not guilty here). However, there was oil deposits on LHS Drive Shaft, car underbody above , and all in the plane in line with left cylinder head gasket . I wiped the head gsket area dry, but which shortly after leaked oil again @ lowest point of left cylinder head (engine off....). I am confident by now is that no mix of coolant in oil or vice versa. What I am puzzled about is that all seems to have started since I switched to the thicker Oil at lower temp two days ago. My question is whether the situation is more or less known / whether I can still diagnose / fix leak from "outside" , or do I need to drop the engine and start tearing the engine down?
