SeeNoWeevil Posted October 2, 2016 Share Posted October 2, 2016 Clicking coming from the back of the engine in time with engine revs, PSSHTTT of air as I blip the throttle from around the same place. Leaking exhaust? Fuel damper? Kinda worried. Help! Quote Link to comment Share on other sites More sharing options...
evest Posted October 2, 2016 Share Posted October 2, 2016 Sounds like an air leak to me. Have tou had any work done or had the plenum off? Pass some tissue around seals near the sound to see if catches any escaping air. Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 Sounds like an air leak to me. Have tou had any work done or had the plenum off? Pass some tissue around seals near the sound to see if catches any escaping air. Cat-back exhaust fitted fairly recently. Quote Link to comment Share on other sites More sharing options...
evest Posted October 2, 2016 Share Posted October 2, 2016 Could be a dicky gasket then, but unlijely and wouldn't think you'd hear from above the engine bay. Are you able to pinpoint the source? Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 Could be a dicky gasket then, but unlijely and wouldn't think you'd hear from above the engine bay. Are you able to pinpoint the source? I'm on my own at the moment so it's kinda difficult to blip and listen but it's very obviously from around the back of the engine. The PSSHT isn't normal induction noise for a Zed I take it? Quote Link to comment Share on other sites More sharing options...
evest Posted October 2, 2016 Share Posted October 2, 2016 It is if you have an aftermarket style intake! Otherwise sounds like air escaping from somewhere as it's being sucked in, and the clicking noise is probably air escaping in time with the engine turning over. Could be the gasket between the upper and lower plenum. Check all your hoses and jubilee clips and see if you can track down the clicking noise Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 It's a stock intake. Clicking noise is definitely from around the Fuel Damper, which I believe is this thing? More worringly, there's a knocking which is loudest around the front, rightmost tensioner. Quote Link to comment Share on other sites More sharing options...
evest Posted October 2, 2016 Share Posted October 2, 2016 If you're on high mileage then it possible that the timing chain tensioners have extended far enough to cause a noise/knocking whilst idling. I think a few folks have now gotten to the point of replacing the chain. Not sure what what to advise on the fuel dampener though. Quote Link to comment Share on other sites More sharing options...
evest Posted October 2, 2016 Share Posted October 2, 2016 (edited) If your fuel dampener is faulty, i noticed there is one for sale over on the trading post post... http://www.350z-uk.com/topic/103679-fuel-dampers-fuel-rail/ Ah sorry - been sold! But the thread did mention about the ticking sound. Edited October 2, 2016 by evest Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 Thanks for the help. Car is on ~60K. Will take it to Nissan tomorrow, fearing the worst Quote Link to comment Share on other sites More sharing options...
ZEUS Posted October 2, 2016 Share Posted October 2, 2016 Don't take it to Nissan they will have your pants down, go to a specialist on here. Where abouts are you located? Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 (edited) Don't take it to Nissan they will have your pants down, go to a specialist on here. Where abouts are you located? Devon. I don't think I have much choice sadly. Edited October 2, 2016 by SeeNoWeevil Quote Link to comment Share on other sites More sharing options...
mouthwash Posted October 2, 2016 Share Posted October 2, 2016 http://www.350z-uk.com/topic/104039-vq35de-rev-up-engine-ticking-noise/ Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 http://www.350z-uk.com/topic/104039-vq35de-rev-up-engine-ticking-noise/ Yeah, I think I've read every damn topic re. tapping zeds. Thanks though. If it's major valve issues I'm going to cry. The car gets absolutely babied and top quality oil every 5k/levels checked with obsessive regularity (it doesn't use a drop). Quote Link to comment Share on other sites More sharing options...
mouthwash Posted October 2, 2016 Share Posted October 2, 2016 Surely it's worth getting that changed first with a good one from ZMANALEX rather than having your pants pulled down at Nissan? Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 2, 2016 Author Share Posted October 2, 2016 Surely it's worth getting that changed first with a good one from ZMANALEX rather than having your pants pulled down at Nissan? Yeah, I think you might be right. Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 6, 2016 Author Share Posted October 6, 2016 Fuel Damper hasn't cured the tapping. Gutted. No idea what to do with it next. Quote Link to comment Share on other sites More sharing options...
mouthwash Posted October 6, 2016 Share Posted October 6, 2016 The engines always do make a fair bit of noise, is there another 350z owner in your area? If not go and look at a couple of 350z's on garage forecourts and see what they sound like. Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 6, 2016 Author Share Posted October 6, 2016 The engines always do make a fair bit of noise, is there another 350z owner in your area? If not go and look at a couple of 350z's on garage forecourts and see what they sound like. Yeah, the garage that looked at it had the stethescope on it and said it was definitely internal, camshaft area, passenger bank. Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 6, 2016 Author Share Posted October 6, 2016 Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 17, 2016 Author Share Posted October 17, 2016 (edited) At a real loss with this. Car is being looked at but no one can find the issue. It took quite a while to replicate it, sounds normal most of the time. Only happens when hot, but not always. Can restart the engine and the noise is gone Noise sounds to be coming from the front cylinder (check with stethoscope) Plugs checked Cylinders checked with borescope Conrod bearing seems ok No fault codes Disabling injector on cylinders in turn on passenger bank, noise doesn't stop No damage to camshaft or valve followers Valve clearances are perfect Clutch in doesn't change the noise but loading up the engine against the handbrake makes the noise dissipate Flywheel looks ok Fuel Damper changed Timing chain tensioner is going to be checked next. Edited October 17, 2016 by SeeNoWeevil Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 17, 2016 Share Posted October 17, 2016 I was going to say TCT. Reminds me of the classic S2000 tensioner sound albeit a little deeper. Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 17, 2016 Author Share Posted October 17, 2016 Timing chain tensioner looks fine. Running out of ideas. Quote Link to comment Share on other sites More sharing options...
Olly350z Posted October 18, 2016 Share Posted October 18, 2016 Following. Mine sounds like this after a real good run. Tuning shop recently hqd it was fine as they are noisy engines, but they did suggest injector tick Quote Link to comment Share on other sites More sharing options...
SeeNoWeevil Posted October 18, 2016 Author Share Posted October 18, 2016 Following. Mine sounds like this after a real good run. Tuning shop recently hqd it was fine as they are noisy engines, but they did suggest injector tick I'm getting absolutely nowhere with it and almost everything has been examined. I'm told the engine is in excellent condition and the symptoms/inspections don't point to any major internal damage, but we can't find the source of the noise. The only remaining things to check are the VVT solenoids. I'm not sure I can tolerate the uncertainty over the condition of the engine/car personally. Quote Link to comment Share on other sites More sharing options...
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