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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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getting a slight rap @3k RPM under light throttle
Just got my car running after the engine sat dormant for 5 years and the chassis for 20+.
It's a 3.4 EFI 930 with hydraulic tensioners. I am getting a rap from 2800-3200 RPM with very light throttle. I am leaning towards tensioners. There is no sound on decel nor under moderate and above acceleration. http://youtu.be/evHQkl6Q1IE http://youtu.be/pu4xxKKPG7g I'd like to get this sorted out soon so I can get it to the dyno. I am running 15/40 Rotella and seeing 2.5 BAR for oil pressure @3k. This noise is less noticeable when the car is cold. Think 20/50 will fix this issue? I am getting ready to do an oil dump when I get back. Plan was to run the car for a tank of fuel to get all the residual fuel out and then dump oil and do filter changes. Fuel, oil and oil screen (pre filter) change. Last edited by IMR-Merlin; 05-30-2015 at 09:38 AM.. |
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05-30-2015, 09:36 AM
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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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05-30-2015, 12:05 PM
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beancounter
Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,593
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pressure per gauge does seem a bit low vs. rpm. You might want to verify the gauge and/or sender is operating correctly.
__________________
Jacob Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690 Past: 2009 997 Turbo Cab / 1979 930 |
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05-31-2015, 12:26 PM
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