Sigolf13 Posted September 25, 2018 Share Posted September 25, 2018 Hi guys and gals. Really hoping for some good advice as I have found a few posts and YouTube videos with others suffering this problem but as yet no solutions. I recently decatted my DE(04) 350z which has 70k miles and am now getting quite a lot of white smoke from the exhaust. It seems to happen at low revs around town, a nice cloud when pulling up at junctions etc and a gentle stream at idle. The car seems to drive fine with no obvious loss of power. It's not coolant as checked levels with no loss so ruling out head gasket. I'm thinking it's burning oil but with no rough running I can't see it being engine internals? Yesterday I took off the upper plenum and cleaned out a good amount of oil and cleaned the PCV valve which seems to be operating ok with a quick suck n blow through each end with the valve closing like a 1 way valve should. Has anyone encountered this and managed to figure out what to do to resolve? Any reason this has only just started to happen? Oil consumption was very low before this week! I had cleaned most of the plenum before removing the brass coloured plate in the middle where I found a decent amount of oil. Thanks in advance Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted September 25, 2018 Share Posted September 25, 2018 Stick the OEM cats back on as they run at a higher temperature and burn off the oil before it reaches the exhaust tail pipe. Quote Link to comment Share on other sites More sharing options...
Sigolf13 Posted September 25, 2018 Author Share Posted September 25, 2018 6 minutes ago, ZMANALEX said: Stick the OEM cats back on as they run at a higher temperature and burn off the oil before it reaches the exhaust tail pipe. So this is a common problem with everyone running decats? Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted September 25, 2018 Share Posted September 25, 2018 No, not everyone, but the probable fix to your issues is advised above. Quote Link to comment Share on other sites More sharing options...
Sigolf13 Posted September 25, 2018 Author Share Posted September 25, 2018 Would prefer the OEM cats but mine were rusted through. Just can't find any for sale Quote Link to comment Share on other sites More sharing options...
CLASSIX Posted September 26, 2018 Share Posted September 26, 2018 If not done already, fit a good oil catch can, DE's are buggers for sucking oil up into the plenum, it may help reduce your problem. Quote Link to comment Share on other sites More sharing options...
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