CArFAn Posted November 12, 2010 Share Posted November 12, 2010 So a friend and i started up a motor in a z that he had for a while and it ran fine then started making these weird noises that we have never heard before. Attached is a video. As stated in the video who ever guesses what the noise is will get 50k interweb pointz. Until then we will keep driving it. I think its just an exhaust leak or something, he thinks its a massive cam. Enjoi- Quote Link to comment Share on other sites More sharing options...
cockerstar Posted November 12, 2010 Share Posted November 12, 2010 (edited) Complete destruction of a rod bearing? I haven't ever heard anything quite like it Edited November 12, 2010 by cockerstar Quote Link to comment Share on other sites More sharing options...
bobbyc Posted November 12, 2010 Share Posted November 12, 2010 has the valve cover been removed? sounds like a rocker floating around. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted November 12, 2010 Administrators Share Posted November 12, 2010 Due to the frequency vs revs and being somewhat dependent on load, if internal knocking, possibly all 6 busted pistons skirts or timing chain slapping the front cover. Something else that comes to mind is exhaust system smacking the body/engine mounts, or alternator is smacking the block. Quote Link to comment Share on other sites More sharing options...
Xnke Posted November 13, 2010 Share Posted November 13, 2010 Sounds to me like something inside the valve cover, or against the front timing cover. The noise sounds like cast aluminum, to me. Quote Link to comment Share on other sites More sharing options...
jhm Posted November 13, 2010 Share Posted November 13, 2010 I've heard similar noise on motor with the oil pan smashed in....the rods were physically knocking against the pan with each revolution of the engine. Sounds nasty...hope you figure it out....good luck! Quote Link to comment Share on other sites More sharing options...
dhunt571 Posted November 15, 2010 Share Posted November 15, 2010 Sounds like a squeaky fan belt to me.....Or maybe its a dying carburetor float. -Dan Quote Link to comment Share on other sites More sharing options...
srgunz Posted November 15, 2010 Share Posted November 15, 2010 Sounds alot like mine did. Was a very bad (loose) timing chain. Quote Link to comment Share on other sites More sharing options...
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