View Full Version : Spark Plugs and Quality Control
Norm B
08-30-2021, 01:48 PM
What is going on with quality control these days. Here are two plugs out of the same package. Noticed the difference while setting the gap. The next package was exactly the same. Don't know about the previous two sets as they were already installed.
Hard to believe they have the same heat range.
Norm
Norm, that's crazy poor QC. I've never come across anything that far off with the plugs I've used and since I spend a lot of time reading plugs it's not likely I'd miss something like that. I'm guessin' the company went offshore to have them manufactured. That length variation can be the difference between clearance and hitting the piston on some engines. On my race car I have to use the shorter reach electrodes and even then index the ground straps to prevent the piston from hitting them.
What brand? I want to make sure I avoid them.
Hoooper
08-30-2021, 04:19 PM
Champion plugs, sadly cant say Im surprised.
Norm B
08-30-2021, 06:37 PM
Yes, they are Champion and no they won’t be in there long. Will go to a different auto supply and get and different brand. Autolite 3924 are also recommended by my head manufacturer. Will carefully inspect a set of those.
Norm
tonywy
08-30-2021, 08:29 PM
That's interesting, forty years in parts never saw that and all those years sold Champion. I had a AC Delco one time come thru not threaded. Autolite also has a racing line of plugs as well that are of better quality.
Norm B
08-31-2021, 12:26 AM
The set I took out are all the same as the shorter electrode plug in the picture above. They are two years old so what ever changed in the production line happened in that time.
Norm