andyvvc Posted February 4, 2009 Share Posted February 4, 2009 Hi all, I've noticed recently (might be the cold weather, might be the new oil) that my car makes a faint "chattering" noise under WOT between 4800 to 5300rpm. 53 plate GT spec. Exhaust mod, intake panel, lowered, Plenum spacer. Im now running Castrol Edge 5w 30 oil. At first i wasnt too concerned by this, because the car has always had a faint chatter around this area since i bought it. There is no loss of power, no smoke, nothing sinister except the noise. I think its coming from the engine bay, but it could be dash rattle/zizz or even cables under the bonnet resonating for all i know Anyone else get this when they are on WOT ? Seems to be more prevolent in 4th and 5th gears. The only info i can find was from the US Z Tech forum, where several users report the same noise and symptoms. Does the 350 have VVT ? Is it VVT rattle maybe as it kicks in? My old 200SX used to have some VVT rattle at lower revs when cold - that sounded like a tractor it was that bad lol Thoughts appreciated ta Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted February 4, 2009 Share Posted February 4, 2009 VVT on inlet only. There should not be any rattles from the VVT. Quote Link to comment Share on other sites More sharing options...
AK350Z Posted February 4, 2009 Share Posted February 4, 2009 Need new exhaust hangers? Quote Link to comment Share on other sites More sharing options...
JAA350Z Posted February 6, 2009 Share Posted February 6, 2009 I get this noise on my 04 too. To me it doesnt sound mechanical, but would be interesting to see what it is. TBH ive never been too worried about it as it 'chatters' at a slower rate than the RPM speed, so doubt its engine related. Quote Link to comment Share on other sites More sharing options...
andyvvc Posted February 11, 2009 Author Share Posted February 11, 2009 Does no-one except JAA350Z and mysef get this noise..? Are the rest of you driving too slowly to ever approach WOT from 4,600rpm...? Quote Link to comment Share on other sites More sharing options...
jhoneyman Posted February 12, 2009 Share Posted February 12, 2009 Hangers solved my issue with this Quote Link to comment Share on other sites More sharing options...
Mathys Posted February 14, 2009 Share Posted February 14, 2009 I had something like this at lower rpm when the o2 sensors from the cats weren't tight down properly... Quote Link to comment Share on other sites More sharing options...
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