240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

slight knocking noise

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Old Dec 14, 2004 | 05:25 PM
  #2  
280Z4ME's Avatar
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Joined: Dec 2004
Posts: 148
From: Chubbuck, Idaho
Pull the valve cover and have a look see. That is about all I can tell you. The gasket usually doesnt break on the valave cover when you remove it.
Good Luck
Old Dec 14, 2004 | 07:34 PM
  #3  
EZDUZIT's Avatar
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Joined: Aug 2004
Posts: 536
From: Spartanburg S.C.
I will have to go with your dad on this one. My brother has a 74 260Z and he called me up about 2 months ago and said he is going to have to rebuild his engine. I said why? It runs great , he said its knocking like a rod or valvetrain. In said bring it by after work. So he did and I listened to the motor run. Then I pulled out the exspensive engine diagnostics (a long screwdriver and held it to my ear) I placed it on the water pump and that was it . The bearing was going out and making a rattleing noise. So I would say check the simple stuff first! JOSH
Old Jan 28, 2005 | 11:50 PM
  #4  
Fast240Z's Avatar
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Joined: Jun 2004
Posts: 833
From: Sacramento, CA
yeah, check the water pump, and it could also be that you might not get enough oil up into your rockers for those cylinders.
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