03' 350z still smoking after replacing valve covers - Nissan 350Z Forum, Nissan 370Z Tech Forums
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post #1 of 2 (permalink) Old 11-08-2016, 03:45 PM Thread Starter
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Unhappy 03' 350z still smoking after replacing valve covers

Hello! I just joined this site today but have been on here lurking for about 4 months. I've spent a couple of days trying to search out an answer for my Z. So the story goes, I purchased a 2003 350z Base 6 speed earlier in the year and when I bought it, the guy I bought it from was a real not so good guy. having 1 gallon of gas in the tank to hide a fuel leak, having the car already warmed up, not letting me drive the car, etc. But, it was a good deal and I guess I'm a bit of an impulse buyer so I picked it up. The car wasn't all that bad. Nissan actually fixed the fuel leak(it was a recall) and the only real problem was the whiteish blueish smoke that came out of the exhaust for about 2 minutes on a cold start. Everything was fine after that, there wasn't even a SES light. But as of a couple of months ago, there was more smoke coming out of the exhaust as I was driving. A LOT more. So I went on this site, and everyone else with similar problems was saying valve covers. So I ordered the combo valve covers and gaskets from Z1 and replaced them in one day. I also replaced the bank 2 camshaft sensor. once everything was back together, I started the car and no smoke came out... until about 5 minutes later. The smoke is still as apparent as before, if not worse. So now it smokes when I start it, and when I'm accelerating. If I'm really getting on it, there is a worrying amount of white smoke(tinge of blue). And just to clarify, I am losing oil. I have 144,000 miles and the only performance mods i have are Isis test pipes and a Stillen cat-back exhaust. Thanks to anyone that can help me.
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post #2 of 2 (permalink) Old 11-09-2016, 04:33 PM
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Welcome and with 144K on the odo, and a dicey (at best) history on this Z, there's a good possibility the engine has been badly abused. White smoke usually indicates water getting into the combustion chambers. But the blue tinge means there oil being burned as well. Have a compression and leakdown test done to determine if the rings are shot, or head gasket is leaking.
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