2002 Nissan altima 2.5 sometimes smokes alot


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2002 Nissan altima 2.5 sometimes smokes alot

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lucio santiago
User

Nov 4, 2013, 5:50 PM

Post #1 of 4 (2177 views)

2002 Nissan altima 2.5 sometimes smokes alot	Sign In

Hello i have Nissan Altima 2002 2.5 and sometimes blue smoke comes out and sometimes its fine and the engine does not have any noise and i would like to know if this can be a simple fixing or a big problem a guy told me that probably the oxygen sensor needed to be changed but i don't know if that's true Thank You very much and i hope to hear soon from you

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Nov 4, 2013, 6:22 PM

Post #2 of 4 (2169 views)

Re: 2002 Nissan altima 2.5 sometimes smokes alot	Sign In

Really don't think an o2 sensor will solve your smoke problem. Blue smoke usually indicates that the engine is burning oil. This could be from piston rings, valve guide seals, or PCV system issues.

Check your spark plugs and see if you can tell which cylinder(s) is burning oil.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 4, 2013, 6:41 PM)

lucio santiago
User

Nov 4, 2013, 6:38 PM

Post #3 of 4 (2162 views)

Re: 2002 Nissan altima 2.5 sometimes smokes alot	Sign In

OK i'm going to check the spark plugs again the last time i checked them they were fine they were clean and i don't see anything wrong with the spark plugs but i'm going to check or do you think i would have to use any additive

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Nov 4, 2013, 6:41 PM

Post #4 of 4 (2156 views)

Re: 2002 Nissan altima 2.5 sometimes smokes alot	Sign In

Just a heads up:

They thought is would be good to have the catalyst attached to the exhaust manifold up close to the engine because it would heat up the catalyst quicker. The downside of that design is if the catalyst started coming apart, the exhaust pulsation during valve overlap would suck the crap,which acts like sandpaper, right up into the cylinders. The engine would eventually burn excessive oil and even have low compression in some cases. I've seen it happen on a 3.5L Pathfinder. Avoid the exhaust manifold baby cats in my opinion if your looking for a car. If this is the case with your vehicle, it needs an engine and cat.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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