Spark Plug Question
Thread Starter
Instructor
Joined: Dec 2009
Posts: 159
Likes: 0
From: Northville Michigan
Spark Plug Question
My 2007 3LT Convertible is 10 years old but only has 28,000 miles. I am thinking of changing spark plugs (just because). It runs great after warmup but slightly rough when cold.
Questions.
Should I change them or leave them alone?
The stock plugs are ACDelco 41-985. I've heard they have been replaced with ACDelco 41-110.
If I change them should I use the new 41-110's or replace them with the 41-985s?
Your comments welcome.
Thanks.
Questions.
Should I change them or leave them alone?
The stock plugs are ACDelco 41-985. I've heard they have been replaced with ACDelco 41-110.
If I change them should I use the new 41-110's or replace them with the 41-985s?
Your comments welcome.
Thanks.
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
28,000 miles ...
Don't waste your money on plugs
Physical age of the plugs don't mean a thing (unless they are so old that they are a rusted / corroded mess)
.
Don't waste your money on plugs
Physical age of the plugs don't mean a thing (unless they are so old that they are a rusted / corroded mess)
.
Last edited by Turbo6TA; Jul 11, 2017 at 03:10 PM.
Le Mans Master
Joined: Oct 2000
Posts: 6,488
Likes: 714
From: Sausalito CA
I could agree the plugs are probably fine.
There cost is near $10 a piece.
Yet there is a chemical/ electrical bond that can occur between the steel of the plug and the alum heads making removal difficult.
I could recommend you remove the plugs, look them over, apply some anti seize and reinstall to break that potential bond.
Fun DIY project!
There cost is near $10 a piece.
Yet there is a chemical/ electrical bond that can occur between the steel of the plug and the alum heads making removal difficult.
I could recommend you remove the plugs, look them over, apply some anti seize and reinstall to break that potential bond.
Fun DIY project!
Le Mans Master
Joined: May 2015
Posts: 5,187
Likes: 1,216
From: Las Vegas Nevada
cost is much less than $10 each if you don't buy from dealer. Try ebay, or rock auto (I prefer RA). If you hurry at Rockauto, AC/Delco might still have a rebate going. I bought my set of 8 -110 plugs (correct ones for you) for about $42, and got a $24 rebate, the check from which is sitting here on my desk.
The wires on not very costly, either. Since you are doing one, I would do the other, also.
I am not saying you need to do it, but if you do it....
The wires on not very costly, either. Since you are doing one, I would do the other, also.
I am not saying you need to do it, but if you do it....
Last edited by buckmeister2; Jul 11, 2017 at 06:27 PM.
Instructor
Joined: Sep 2014
Posts: 184
Likes: 29
From: Gurnee IL. so close to Wisc. I can smell it when they cut the cheese
97TRC, If you use quality fuel and don't have any mech. issues you should get upwards to 100,000 mi. on your plugs. That said, if you would feel better replacing your plugs then by all means do it. The only downside is the cost and if that doesn't bother you do it. The peace of mind is worth the price just be careful with the plug wires.
p.s. if you change them w/only 28,000 I would be glad to have the old ones..........just kidding
p.s. if you change them w/only 28,000 I would be glad to have the old ones..........just kidding
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Racer
Joined: Aug 2005
Posts: 251
Likes: 32
From: S/W Illinois
I was amazed at their condition. They were the original plugs. We only have 9000 miles on our 2007 Corvette. It will be a long time before I change those plugs!
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Please send a money order to me at "Just Because Corvette Parts & Repair". Leave the garage door open and I'll stop by to swap the plugs for you and you'll feel much better. Pay no attention to the fact the plugs will look just like the originals.
While I'm there, I can also do the 3000 mile oil change, the "I never drive the car" air filter change, and for a limited time only, swap the spark plug wires....All at extra cost of course
While I'm there, I can also do the 3000 mile oil change, the "I never drive the car" air filter change, and for a limited time only, swap the spark plug wires....All at extra cost of course
Race Director
Joined: Apr 2007
Posts: 16,023
Likes: 1,645
From: Toronto, Canada
C7 of the Year - Unmodified Finalist 2021
I can tell you the existing plugs will come out new, however, I would only be concerned about the existing plugs getting fused into the engine and change out for that reason alone.
Burning Brakes
Joined: Oct 2013
Posts: 1,061
Likes: 130
