stock spark plugs
Thread Starter
Pro
Joined: Jan 2005
Posts: 600
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From: Las Vegas NV
stock spark plugs
Hello everyone, I am doing some maintenance on my 99FRC,(royal purple tranny and diff fluid, new brake fluid, belts and plugs, etc) and today i changed the plugs. my car only has 48,000 miles on it and the plugs that I pulled out are NGK PTR5C-13's. Are these the stock plugs? I have looked and searched many times and I have heard about the platinum pucks wearing out, these plugs looked like they had the pucks at one time but now are gone. I replaced them with NGK TR55's gapped at .058inches as suggested. I think chevy needs to give out skin replacemant vouchers with the vettes so that I can get back all the skin that I left around plug #7.
Team Owner
Joined: Jan 2003
Posts: 21,234
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From: Freestate Corvette Club! Elkridge, MD
St. Jude Donor '17
The car came with AC Delco plugs from the factory. Yes - changing the plugs on a car with exhaust manifolds is not finger friendly. Get yourself a set of long tube headers - makes the plug change MUCH easier 
Race Director
Joined: Sep 2004
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From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Next time use a small extension a knuckle a long extension and then the ratchet, takes 10 seconds and no skin removal.
Safety Car
Joined: Sep 2001
Posts: 4,411
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From: Wilmington NC
Originally Posted by kingrobby25
Hello everyone, I am doing some maintenance on my 99FRC,(royal purple tranny and diff fluid, new brake fluid, belts and plugs, etc) and today i changed the plugs. my car only has 48,000 miles on it and the plugs that I pulled out are NGK PTR5C-13's. Are these the stock plugs? I have looked and searched many times and I have heard about the platinum pucks wearing out, these plugs looked like they had the pucks at one time but now are gone. I replaced them with NGK TR55's gapped at .058inches as suggested. I think chevy needs to give out skin replacemant vouchers with the vettes so that I can get back all the skin that I left around plug #7.
Delco was on strike in 1999 so a lot of cars got the NGK or Denso plugs. As far as I know they did not have any problems.
Here is a picture of NGK and Delco.
