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04-27-2007
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#11 | |
Join Date: Jul 2006
Location: Omaha, NE
Posts: 322
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Re: ENGINE
Quote:
 I've been trying to locate mine for the last month that happens right at 1500rpm after the car has warmed up....I'm going to give it one more shot this weekend in an effort to finally kill this snake.
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SteveB '94 ABZ Lucky #13-SOLD |
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04-27-2007
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#12 |
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Join Date: Aug 2005
Location: San Fernando Valley, CA.
Posts: 896
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Re: ENGINE
Id second the motion on checking your cats and using a makeshift stethescope to piinpoint the noise. I had a 5.0 with cats that just "went bad" and could swear up and down I had a rod knock.
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1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj. |
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04-27-2007
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#13 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
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Re: ENGINE
ronnie .< are you shure that wasn't brain knock from owning a FORD
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04-28-2007
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#14 |
 Join Date: Nov 2006
Location: Germantown, Maryland
Posts: 522
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Re: ENGINE
My weird engine noise that fooled a few people turned out to be a water pump failing.
- Keith '90 Red/Red #1383 |
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05-01-2007
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#15 | |
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Join Date: Aug 2005
Location: San Fernando Valley, CA.
Posts: 896
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Re: ENGINE
Quote:
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1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj. |
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05-01-2007
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#16 |
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Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
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Re: ENGINE
ok you got me oh great white ford knocker and your cup size is
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05-01-2007
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#17 |
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Join Date: Sep 2006
Posts: 9
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Re: ENGINE
THIS MAY HELP? I TAKE MY 1991 ZR1 TO STOCKER CHEVROLET IN STATE COLLEGE PA. THEY ARE THE SPONSORS OF USA-1 CORVETTE CLUB IN THE AREA WITH 90+ MEMBERS. THE MECHANIC THERE THAT SERVICES ALL OF THE CORVETTES IS MARTY SPECHT. HE IS ALSO A MEMBERSHIP OFFICER FOR THE CORVETTE CLUB. I HAVE FOUND HIM TO BE VERY KNOWLEDGEABLE AND AN EXCELLENT MECHANIC. THE PHONE NUMBER IS 814-238-4905 . I HOPE THIS HELPS.
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05-01-2007
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#18 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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Re: ENGINE
If you go to the dealer in state college let me know, I'll swing by and say hi and see if I can help
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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05-02-2007
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#19 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: ENGINE
Some good ideas here... How bad is it immediately when you start the engine cold? There have been issues with timing chain tensioners on these engines. If one has failed completely you would get the noise you describe. Do the stethiscope test in the timing chain area on the valve covers, compare one side to the other.
Good luck, Hans 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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Linear Mode
