Why massive oil leak after engine turned off? No issues while driving just b/4?
What is your question?
1993 Buick Regal V6 3.8L. Drove car 25 miles NO issues. Car was running fine (no dash lights, smoke or smell of burning oil). Parked car on level driveway. Went back out to car 1/2 hour later and an insane amount of engine oil leaked on ground (2-3 quarts my guess). Started car quickly to pull in garage (raining). Low oil light now illuminated on dash. Was told it may be loose oil filter (loose or 2 gaskets from last oil change). Or maybe broken/cracked oil pressure sending unit (made sense b/c these areas were plastered with oil). Replaced both parts but leaking still. However leak seems minimal now. Certainly not pouring out quarts at a time. Appears to be coming from upper passenger side of engine. Looks like leak could be originating from behind power steering pump, tensioner, water pump area? Could it be the upper manifold gasket? Or one of those plastic elbow hose connectors? Oil and coolant are NOT mixing together. I drained both systems just to be sure. I am certainly not a professional mechanic. Just a DYI guy trying my like heck. Any insight would be greatly appreciated. Thank you
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Hi GrayBillsAuto,
Thank you for the reply!!! I really appreciate it. This site has been very helpful. Folks like you assisting really make things less frustrating for me (strictly a novice with motivation). Perhaps a dumb question but is the lower intake manifold higher than the oil pressure sensor (switch) and oil filter (on the 3800 V6)? I ask because after my repairs the sensor and filter had fresh oil on them as if something was dripping from above. Again this time there was not an obnoxious amount of oil. Maybe 1/4 cup as far as I can tell. Hey, and thanks again!!!
Yes the lower intake is at the top of the engine. when you put your had on top of the motor the piece you are on is the upper intake. it is bolted to the lower intake. In the v of the cylinder heads. Very common problem with that style of GM motor. Gm has gone through 3 or 4 different versions of the lower intake gaskets to try and stop it from leaking. Not a hard job. If you try to repair it on your own make sure you keep track of the push rod location. They are different lengths and if you put them together wrong you can cause damage.
Hi GrayBillsAuto, Thank you for the reply!!! I really appreciate it. This site has been very helpful. Folks like you assisting really make things less frustrating for me (strictly a novice with motivation). Perhaps a dumb question but is the lower intake manifold higher than the oil pressure sensor (switch) and oil filter (on the 3800 V6)? I ask because after my repairs the sensor and filter had fresh oil on them as if something was dripping from above. Again this time there was not an obnoxious amount of oil. Maybe 1/4 cup as far as I can tell. Hey, and thanks again!!!
Yes the lower intake is at the top of the engine. when you put your had on top of the motor the piece you are on is the upper intake. it is bolted to the lower intake. In the v of the cylinder heads. Very common problem with that style of GM motor. Gm has gone through 3 or 4 different versions of the lower intake gaskets to try and stop it from leaking. Not a hard job. If you try to repair it on your own make sure you keep track of the push rod location. They are different lengths and if you put them together wrong you can cause damage.