spark plug change
Pro
Joined: Apr 2005
Posts: 666
Likes: 5
From: Mt. Pleasant SC
Take one or two out and check their condition. Look for oil corrosion or signs of overheating. That can tell you if you should change now or not and it's good preventive maintenance. I changed mine at 30K and went with the AC Delco Irridiums.
Le Mans Master
Joined: Sep 2003
Posts: 6,253
Likes: 222
From: Farmington CT
Cruise-In VII Veteran
unless the car is modified the stock plugs should be OK for now, typically NGK TR55's are used in N/A(naturally aspirated) modifications
I have shop in South Windsor, if you ever have questions give me a call
I have shop in South Windsor, if you ever have questions give me a call
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 28
From: Vancouver Washington
Originally Posted by Steve@CTCorvette
unless the car is modified the stock plugs should be OK for now, typically NGK TR55's are used in N/A(naturally aspirated) modifications
I have shop in South Windsor, if you ever have questions give me a call
I have shop in South Windsor, if you ever have questions give me a call
Pro
Joined: Aug 2004
Posts: 575
Likes: 0
From: Richmond Hill Ontario
Wouldn't hurt to take them out see how they look. Wear isn't going to be an issue at this point but there's no way I'd leave them in for 100k. A bit of anti-seize before you put them back in but make sure you don't get any on the end of the plug as this stuff is conductive and can cause a misfire. What you have to remember is that depending on where you live the quality of fuel can change as well as the additives used in them. This can greatly affect the life of your plugs. The other factor is the mechanical condition of the engine and various components as well as the sensors that control them. Nothing can tell you more about the condition of your engine and how it's running than a spark plug. Yet , they are the least expensive component to replace and something that we can all still do. Why not change those plugs more often and keep your engine running it's best?
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 447
From: Atlanta metro Ga.
Here's the best reason to pull your stock plugs ASAP (probably too late already); the stock plugs have a small puck tacked on that inevitably falls off (guess where it goes? In your cumbustion chamber, that's where), radically increasing the gap.
The plugs the car came with should absolutely be replaced, no question.
The plugs the car came with should absolutely be replaced, no question.
Last edited by Dan_the_C5_Man; Nov 20, 2006 at 02:05 PM.
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Instructor
Joined: Jan 2006
Posts: 242
Likes: 1
From: Raleigh NC
Just changed all of mine and guess what (60k miles)
all the plugs were missing the puck and had a HUGE GAP
Changed new plugs/wires
That intermittent miss I had is gone and the car runs great.
Bet my gas mileage is back too
Will now change them every 30k miles
CHANGE YOUR PLUGS
all the plugs were missing the puck and had a HUGE GAP
Changed new plugs/wires
That intermittent miss I had is gone and the car runs great.
Bet my gas mileage is back too
Will now change them every 30k miles
CHANGE YOUR PLUGS
Drifting
Joined: Jun 2004
Posts: 1,484
Likes: 20
From: FLORIDA
Originally Posted by c3andc5
Take one or two out and check their condition. Look for oil corrosion or signs of overheating. That can tell you if you should change now or not and it's good preventive maintenance. I changed mine at 30K and went with the AC Delco Irridiums.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Tigershark3
IMHO I would not wait until 100k - They could be a bear to get out and you could strip the threads. Don't forget the anti-seize. 
Be sure to wait until the engine is well cooled before removing and do yourself (and your knuckles) a favor by disconnecting and removing the driver's side coil pack as an assembly. One harness plug, four plug wires and five bolts and this is easily done. It will make a huge difference in the amount of room you now have to reach the number seven plug. 
HTH,
Robert
Instructor
Joined: Jan 2006
Posts: 242
Likes: 1
From: Raleigh NC
Originally Posted by Tigershark3
IMHO I would not wait until 100k - They could be a bear to get out and you could strip the threads. Don't forget the anti-seize.
The plugs on the passenger side were fairly easy to get out. The plugs on the driver side were in pretty tight.