white smoking and burning oil

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GTR24
Posts: 38
Joined: Thu Jul 17, 2008 9:14 pm
Car: 1995 240sx
2015 370z

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My engine is burning oil, its a high mileage motor (205,000 miles). So my initial diagnosis would be piston rings. But... I've found oil on top of my spark plugs. All 4 of the spark plug wires are drenched with motor oil. After I changed the valve cover gasket and spark plug seal, I only found oil in 2 of the spark plugs. It may need another spark plug seal. I only top off the oil every 2 weeks, not a major loss of oil.
Basically I'm wanting to know where my engine is burning oil.

A. The piston rings
B. The spark plug seal
C. Both A and B
D. Something else


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PEZi
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If its truly smoking white, you need to check your oil for coolant contamination... and possible headgasket failure

But, to answer your question, both A & B make sense

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OutToWinPAHC
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Compression test, if your good you should do gaskets and seals for sure. I wonder if the rear main is leaking.

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allenms240
Posts: 661
Joined: Sun Mar 08, 2009 5:54 pm
Car: 1991 Nissan 240SX

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Or front main, or oil pan gasket?

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krash
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It could also be valve seals

GTR24
Posts: 38
Joined: Thu Jul 17, 2008 9:14 pm
Car: 1995 240sx
2015 370z

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Thanks to everyone for responding. I know for sure its not the head gasket. I know what exhaust + coolant smells like, and luckily its not that. Also, Its not the oil pan gasket or the rear main seal. No oil stains in my driveway.


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