danZman Posted November 3, 2009 Share Posted November 3, 2009 Ever since I owned the car (4 months) 7 times out of 10 it makes a very strange rattling noise on startup, this morning was extra loud. It starts every time, always on 5th click of starter motor, the revs jump up to 2k and then drop down to cold idle RPM, usually 1200 - 1500. But its so loud its making me think there's something loose.... Because I have the clutch engaged, im sure it isnt any part of the drive-train as it never makes the noise again until next cold start-up. I think it might be the starter motor.... but its functioning fine. Any thoughts from you tecys / more experienced 350z owners? standard 2003 jap import Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted November 3, 2009 Share Posted November 3, 2009 Ever since I owned the car (4 months) 7 times out of 10 it makes a very strange rattling noise on startup, this morning was extra loud. It starts every time, always on 5th click of starter motor, the revs jump up to 2k and then drop down to cold idle RPM, usually 1200 - 1500. But its so loud its making me think there's something loose.... Because I have the clutch engaged, im sure it isnt any part of the drive-train as it never makes the noise again until next cold start-up. I think it might be the starter motor.... but its functioning fine. Any thoughts from you tecys / more experienced 350z owners? standard 2003 jap import Fitstly check your engine oil and then get the car looked at for an informed diagnoses. Quote Link to comment Share on other sites More sharing options...
danZman Posted November 3, 2009 Author Share Posted November 3, 2009 Engine oil is half way, and only changed 2k ago. Looks like I will need to get someone to get under it and take a look, just wondering if you guys could narrow down the problem as by debit card isn't such a happy bunny as it was a month ago. Quote Link to comment Share on other sites More sharing options...
Harman350z Posted November 3, 2009 Share Posted November 3, 2009 My 03 JDM sometimes does the same on cold starts first thing in the morning. Had an oil change when i had my P2 service last month through NSN, seemed to solved the problem for now, i think it has done it once since then. Quote Link to comment Share on other sites More sharing options...
Beavis Posted November 3, 2009 Share Posted November 3, 2009 Mine does it for a brief second on start up especially if its been standing a while. Quote Link to comment Share on other sites More sharing options...
Harman350z Posted November 3, 2009 Share Posted November 3, 2009 Pretty normal thing.. viewtopic.php?f=9&t=4488&p=45642&hilit=rattle+on+cold+start#p45642 viewtopic.php?f=10&t=9536&p=123476&hilit=cold+start+rattle#p123476 Quote Link to comment Share on other sites More sharing options...
danZman Posted November 3, 2009 Author Share Posted November 3, 2009 Pretty normal thing.. viewtopic.php?f=9&t=4488&p=45642&hilit=rattle+on+cold+start#p45642 viewtopic.php?f=10&t=9536&p=123476&hilit=cold+start+rattle#p123476 Thank god. Thanks for your help guys, im using 5w30 too so the oil is pretty thin. Feeling better about it now, will top her up tonight. Wise to mix 5w30 with 10w40? I would rather have thicker oil for the winter. Maybe ill change it. Quote Link to comment Share on other sites More sharing options...
sketch Posted November 3, 2009 Share Posted November 3, 2009 could be your dual mass flywheel Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted November 3, 2009 Share Posted November 3, 2009 It will be cam chain tensioner not tensioning the chain on initail start up ,thicker oil will help thou ,we use a 10W50 oil which does seem tohelp. Quote Link to comment Share on other sites More sharing options...
danZman Posted November 4, 2009 Author Share Posted November 4, 2009 I think your right, I put more 5w30 in it and it was quieter this morning. Think next oil change I will move to a thicker oil for the winter. Quote Link to comment Share on other sites More sharing options...
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