• Tiny
  • Hend2110
  • 2003 Nissan Altima
  • 2.5L
  • 4 CYL
  • 2WD
  • automatic
  • 167,000 miles

I have 2003 Nissan Altima 2, 5s smoke a lot and smell burning oil. Check the spark plug all wet except no: 3 look dry. Compression tested (cold engine) and the result are, no1: 160, no2: 159, no3: 160, no4: 161. Open the exhaust manifold all wet just no: 3 dry. Open the catalytic converter look good no clog. Take off the cylinder head and check the valve steam look dry on valve part inside the exhaust and intake manifold. Now I am confusing. What you think my car problem burning a lot oil from. Ring piston or cylinder head. Please give suggestion before I am do something else. Thank you so much.

Wednesday, May 28th, 2014 AT 12:32 PM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 43,007 posts

What do the pistons look like? Are they wet /dry or carboned. If wet it may be rings but your compression sure looks good so I think not in that respect. Besides to really test rings you need to do a leakdown test. I'd check the valve seals as I'd be t that is the problem. Especially with the miles on it.

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Wednesday, May 28th, 2014 AT 12:37 PM

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