Notices
C5 General General C5 Corvette and C5 Z06 Discussion not covered in Tech

Spark Plugs

Thread Tools
 
Search this Thread
 
Old Aug 16, 2021 | 03:16 PM
  #1  
StevieB's Avatar
StevieB
Thread Starter
Race Director
20 Year Member
Community Builder
All Eyes On Me
Top Answer: 1
 
Joined: Aug 2002
Posts: 10,244
Likes: 96
From: not far enough from Chicago
Default Spark Plugs

Hi guys, I would like some advise on spark plugs and wires.
My 98 has 20K miles. I always use 93 octane gas with stabil in the winter, it has never even been driven in the rain.
It’s basically like new. Not the slightest amount of rust at all, anyplace.

Under those conditions do I need new spark plugs just because of the age? Thank you, Steve

Last edited by StevieB; Aug 16, 2021 at 03:20 PM.
Reply
Old Aug 16, 2021 | 03:32 PM
  #2  
MWWarlord's Avatar
MWWarlord
Le Mans Master
Supporting Lifetime Gold
Community Builder
Photoriffic
Community Favorite
Top Answer: 5
 
Joined: Dec 2017
Posts: 5,590
Likes: 3,317
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
Default

I'd be much more worried about fluids, belts, and tires. These cars are made to be driven, and they can develop issues if they sit too much. I suspect the plugs are fine, but you may need a new battery.
Reply
Old Aug 16, 2021 | 05:33 PM
  #3  
1wholikescars's Avatar
1wholikescars
Racer
 
Joined: Apr 2021
Posts: 289
Likes: 102
From: Texas
Default

You can pretty easily pull one and take a look. Spark plugs can be a bit funny at times, they can last 1000 years, or the little things can come apart. Can't hurt to check. However, as the above poster said: hoses, belts, fluids.are the things to check first.
Reply
Old Aug 16, 2021 | 05:39 PM
  #4  
StevieB's Avatar
StevieB
Thread Starter
Race Director
20 Year Member
Community Builder
All Eyes On Me
Top Answer: 1
 
Joined: Aug 2002
Posts: 10,244
Likes: 96
From: not far enough from Chicago
Default

Originally Posted by MWWarlord
I'd be much more worried about fluids, belts, and tires. These cars are made to be driven, and they can develop issues if they sit too much. I suspect the plugs are fine, but you may need a new battery.
Everything EXCEPT for the plugs have been maintained exactly as if the car has been driven
at average mileage. Even while being stored and covered during the months while not driven. Stabil,
New Mobil1 every spring even when it is still clear, brake fluid because it wasn’t perfectly clear.
Battery when it had nothing wrong with it, based upon age, absolutely everything I can think of.








Last edited by StevieB; Aug 16, 2021 at 05:41 PM.
Reply
Old Aug 16, 2021 | 05:43 PM
  #5  
knewblewkorvette's Avatar
knewblewkorvette
Race Director
Supporting Lifetime
Veteran: Air Force
St. Jude 20 Year Donor
Loved
Community Favorite
 
Joined: May 2003
Posts: 14,137
Likes: 2,984
From: Iowa
St. Jude Donor '03 thru '26
Default

The stock iridium spark plugs are rated for 100,000 miles. I haven't changed mine in my 02 (37,000 miles). I think you are good to go.
Reply
Old Aug 16, 2021 | 06:14 PM
  #6  
Mike98SilVert's Avatar
Mike98SilVert
Team Owner
20 Year Member
Active Streak: 90 Days
Community Favorite
Top Answer: 5
 
Joined: Sep 2002
Posts: 30,572
Likes: 4,610
From: Bonita Springs, Florida
Default

Your spark plug wires are probably brittle from age and may come apart if you try pulling them off your spark plugs.
Reply
Old Aug 16, 2021 | 06:34 PM
  #7  
StevieB's Avatar
StevieB
Thread Starter
Race Director
20 Year Member
Community Builder
All Eyes On Me
Top Answer: 1
 
Joined: Aug 2002
Posts: 10,244
Likes: 96
From: not far enough from Chicago
Default

Originally Posted by Mike98SilVert
Your spark plug wires are probably brittle from age and may come apart if you try pulling them off your spark plugs.
Yea, that has come to mind as well.
Reply
Old Aug 16, 2021 | 07:01 PM
  #8  
StevieB's Avatar
StevieB
Thread Starter
Race Director
20 Year Member
Community Builder
All Eyes On Me
Top Answer: 1
 
Joined: Aug 2002
Posts: 10,244
Likes: 96
From: not far enough from Chicago
Default

When I was a kid I had a 69 Charger 426 hemi. That was so easy to get at all of the plugs. They came straight
out of the head on top. I think all cars should have a hemi. Although In the case of the C5,the front would be
too high to sit so far back

This= with 2 holly 4 bbl carbs

No exhauset pipes.
Just headers and 2 small mufflers/that was it, pretty LOUD
A lot for a 17 year old kid to control,but not impossible. Just mash the pedal to the floor/ hold on tight and keep it in a straight line.
It had some mods that I can't remember. It wasn't a manual trans or automatic,hard to explain.
This has been a walk down memory lane.


I look at that, now an old man that can't change plugs








Last edited by StevieB; Aug 16, 2021 at 07:16 PM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Aug 16, 2021 | 11:09 PM
  #9  
Vetteman Jack's Avatar
Vetteman Jack
Administrator
Supporting Lifetime
Veteran: Navy
St. Jude 20 Year Donor
25 Year Member
Veteran: Reserves
 
Joined: Mar 2001
Posts: 368,319
Likes: 24,777
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Default

Pull a plug or two and see what they look like - most likely they will be just fine. If anything, the wires may need to be replaced as they do degrade over time.
Reply

Get notified of new replies

To Spark Plugs





All times are GMT -4. The time now is 07:54 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE