C4 General Discussion General C4 Corvette Discussion not covered in Tech

spark plug change

Thread Tools
 
Search this Thread
 
Old May 26, 2021 | 01:14 PM
  #1  
new2me92's Avatar
new2me92
Thread Starter
Advanced
 
Joined: Jul 2018
Posts: 83
Likes: 17
From: Gonzales louisiana
Default spark plug change

is there any secrets i need to know when changing the spark plugs on my 92 lti corvette
Reply
Old May 26, 2021 | 01:21 PM
  #2  
Nomake Wan's Avatar
Nomake Wan
Drifting
 
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
Default

The last plug on the passenger side, cylinder 8, will make you want to cry. It's hard to reach, the plug boot will likely fight you to the death before coming off, and you'll have a ton of fun trying to get the new spark plug angled correctly so that you can thread it in without getting a bunch of grime on it first.

The driver's side will make you want to sell the car.

I'm only half-kidding. If you're only doing plugs but not wires, then it's not all that bad. Just move the ASR and throttle cable mechanisms out of the way to make room, and remove the driver's side wheel well inner cover if you need more than that. The plugs aren't too bad, it's changing the wires on the driver's side that is awful.
Reply
Old May 26, 2021 | 02:13 PM
  #3  
Beater12's Avatar
Beater12
Racer
 
Joined: Mar 2016
Posts: 344
Likes: 65
From: Ontario, Canada
Default

Or you could do what I did. After reading all the horror stories I let the mechanic do it while doing some other stuff. He had done a lot of them and didn't even complain about it!
Reply
Old May 26, 2021 | 02:35 PM
  #4  
AgentEran's Avatar
AgentEran
Drifting
10 Year Member
 
Joined: Apr 2014
Posts: 1,699
Likes: 231
From: Hawthorne CA
Default

Originally Posted by Beater12
Or you could do what I did. After reading all the horror stories I let the mechanic do it while doing some other stuff. He had done a lot of them and didn't even complain about it!
How much $$ is this option??
Reply
Old May 26, 2021 | 03:35 PM
  #5  
Beater12's Avatar
Beater12
Racer
 
Joined: Mar 2016
Posts: 344
Likes: 65
From: Ontario, Canada
Default

Not sure what it cost because I had it done with a lot of other stuff. Bill broke labour price down but not that specifically.
Reply
Old May 26, 2021 | 05:48 PM
  #6  
Cruisinfanatic's Avatar
Cruisinfanatic
Le Mans Master
Supporting Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 6,228
Likes: 698
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Default

Originally Posted by new2me92
is there any secrets i need to know when changing the spark plugs on my 92 lti corvette
Patience
Reply
Old May 26, 2021 | 06:33 PM
  #7  
AgentEran's Avatar
AgentEran
Drifting
10 Year Member
 
Joined: Apr 2014
Posts: 1,699
Likes: 231
From: Hawthorne CA
Default

Originally Posted by new2me92
is there any secrets i need to know when changing the spark plugs on my 92 lti corvette
whatever you do, dont force with a plug socket. You should start each plug (carefully) by hand then hand tighten. Once it is in there by hand torque to spec. Its absolutely no fun at all when you cross thread a sparkplug boss. Ask me how I know.
Reply
Old May 26, 2021 | 08:30 PM
  #8  
95LT1ZF's Avatar
95LT1ZF
Pro
 
Joined: Sep 2018
Posts: 671
Likes: 171
From: Birmingham, Alabama
Default

Yes. The back passenger side plug is a bear. Took my wife's small hands from under the car about an hour tobgetnit. The rest are pretty straight forward.
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 May 26, 2021 | 08:59 PM
  #9  
Whaleman's Avatar
Whaleman
Safety Car
Liked
Loved
Community Favorite
Top Answer: 3
 
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
Default

It is also fun when you drop the plug trying to start it in #8. Almost impossible to get it out. Dan
Reply
Old May 26, 2021 | 09:18 PM
  #10  
Beater12's Avatar
Beater12
Racer
 
Joined: Mar 2016
Posts: 344
Likes: 65
From: Ontario, Canada
Default

Originally Posted by 95LT1ZF
Yes. The back passenger side plug is a bear. Took my wife's small hands from under the car about an hour tobgetnit. The rest are pretty straight forward.
You got your wife to lay under your car for an hour putting a plug for you! She's a keeper!
Reply
Old May 26, 2021 | 09:25 PM
  #11  
mark970's Avatar
mark970
Drifting
Veteran: Navy
 
Joined: Apr 2017
Posts: 1,336
Likes: 287
From: Minnesota
Default

The last plug on passenger side (#8) worked best for me with no extension and getting it loose enough to use my hands for the removal, baby turns basically.
Drivers side was super easy. remove the ASR box (1 bolt, in the wheel well) and the wheel-well dust cover so you can get straight access. I think for me, the worst one was either #4 or #6 (cant recall) but the control arm was in my way just enough to

really, not a big deal...just pay close attention to installing, don't force the thread and make sure the area is clean (good idea to use LP air prior to removal and blow out the dirt/sand/debris. Another tip is to go up a size on the plug wires. OE is 7mm but many people go up to 8mm. the only issue with doing this is the looms...the 8mm wires wont fit that great in stock "mounted" looms.

Not sure why people complain so much, nothing is "hard"...hard is relative...instead just accept that certain tasks are going to suck and just go for it and get it over with
Reply
Old May 26, 2021 | 10:58 PM
  #12  
new2me92's Avatar
new2me92
Thread Starter
Advanced
 
Joined: Jul 2018
Posts: 83
Likes: 17
From: Gonzales louisiana
Default

thanks everyone for your input, after some deep thought i decided not to hang myself but take my time and be patient. wish me luck
Reply
Old May 27, 2021 | 07:06 AM
  #13  
PacerX's Avatar
PacerX
Burning Brakes
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2000
Posts: 986
Likes: 487
Default

Originally Posted by new2me92
thanks everyone for your input, after some deep thought i decided not to hang myself but take my time and be patient. wish me luck
There's a lot of winging that goes on about changing plugs in a C4...

They're really not that bad. I've dealt with much, much worse.

Just take your time, have a few different length extensions on hand, use an actual spark plug socket (so you can put a wrench on it if you need to), blow the pocket out before removing and restart them by hand.
Reply
Old May 28, 2021 | 05:35 PM
  #14  
DGXR's Avatar
DGXR
Melting Slicks
 
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
Default

Originally Posted by new2me92
thanks everyone for your input, after some deep thought i decided not to hang myself but take my time and be patient. wish me luck
You can do it! If your spark plug socket has a hexagonal backside, that is for a reason. Find a box wrench that fits it and this setup could make things much easier when access gets tight.
Reply

Get notified of new replies

To spark plug change





All times are GMT -4. The time now is 03:27 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