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993 engine noise at 3200 rpm
I have a loud high frequency tapping sound at 3200 to 4000 rpm. Seems to be coming from the driver side front cylinder bank. I used a stethoscope and can't find it anywhere else. It's so loud that it shocks you. It stills runs fine. Hot or cold, the sound is the same. Any ideas?
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01-02-2012, 06:10 PM
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Registered
Join Date: Apr 2006
Location: Ellicott City, MD
Posts: 448
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Collapsed lifter(s)?
Andreas
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1995 993 Coupe, Polar Silver / Black 2014 Audi A4, Monsoon Gray / Black 2002 Toyota 4Runner, Dorado Gold 2001 Toyota 4Runner, Dorado Gold, 604,XXX 1-owner miles 1998 Toyota 4Runner, Oxidized, 5-speed |
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01-06-2012, 10:22 PM
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Let's hope it is. I'd pull the valve cover for a look before I'd run it any more.
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Ed Hughes 2015 981 Cayman GTS 6 speed,Racing Yellow Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4 |
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01-10-2012, 09:32 PM
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Thanks! I'll pull the valve covers to get a closer look.
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____________ Greg 1995 993 Coupe http://www.garagescenes.com |
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01-11-2012, 05:21 PM
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Looks like it was a collapsed lifter. There were ridges and heat discoloration where the foot was bouncing on the cam. Thanks!
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____________ Greg 1995 993 Coupe http://www.garagescenes.com |
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01-16-2012, 07:37 PM
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Photos of the damaged rocker....
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____________ Greg 1995 993 Coupe http://www.garagescenes.com |
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01-16-2012, 07:53 PM
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____________ Greg 1995 993 Coupe http://www.garagescenes.com |
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01-16-2012, 07:55 PM
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1984 Porsche 911 Targa 3.4L
Sapphire
