Autopia.org - View Single Post - Nissan Recalling 97,000 Altima, Sentra Sedans

Kewjoe · 08-27-07, 10:12

the Sentra SE-R (02-06) had 2 problems with it 1) the pre-cat which resides in the exhaust manifold would break apart due to uncombusted gas leaving the engine and parts of the cat will get sucked back in causing all sorts of scoring of cylinder walls, etc. and oil consumption 2) Intake manifold has butterfly valves, each valve (4 of them) had 2 little screws holding them in.. in some cases engine vibration caused the screws to loosen and get sucked into the engine, in extreme cases the entire valve plate gets sucked in too.

the Fixes are easy for both 1) aftermarket header removed the pre-cat, you still have main cat for emissions and 2) open intake manifold, locktite screws. I did both to my car and have had no issues with my car (knock on wood)

This thread is talking about an issue only affecting 2006 model 2.5L engines (SE-R and Altima). From what i read Nissan decided to try a different piston ring or something and it was a bad idea.

08-27-07, 10:12	#11 (permalink)
Kewjoe Registered User Kewjoe is offline Join Date: Aug 2006 Location: Toronto, Ontario Posts: 128	Re: Nissan Recalling 97,000 Altima, Sentra Sedans the Sentra SE-R (02-06) had 2 problems with it 1) the pre-cat which resides in the exhaust manifold would break apart due to uncombusted gas leaving the engine and parts of the cat will get sucked back in causing all sorts of scoring of cylinder walls, etc. and oil consumption 2) Intake manifold has butterfly valves, each valve (4 of them) had 2 little screws holding them in.. in some cases engine vibration caused the screws to loosen and get sucked into the engine, in extreme cases the entire valve plate gets sucked in too. the Fixes are easy for both 1) aftermarket header removed the pre-cat, you still have main cat for emissions and 2) open intake manifold, locktite screws. I did both to my car and have had no issues with my car (knock on wood) This thread is talking about an issue only affecting 2006 model 2.5L engines (SE-R and Altima). From what i read Nissan decided to try a different piston ring or something and it was a bad idea.