Chevrolet Cruze Forums banner

Spark Plug Gap

762 Views 10 Replies 8 Participants Last post by  V0latyle
Okay so I’ve been seeing everywhere that spark plug gap should be .027-.028 but acdelco spark plugs come out the package at .023, are pre gapped and say to not re gap, so now I’m confused what gap should it actually be.
1 - 11 of 11 Posts

· Registered
2013 Cruze LT
Joined
·
4,280 Posts
Okay so I’ve been seeing everywhere that spark plug gap should be .027-.028 but acdelco spark plugs come out the package at .023, are pre gapped and say to not re gap, so now I’m confused what gap should it actually be.
Mine all came very close to .028, I personally don't think you'll have any issues at .023, that's splitting hairs.
 

· Administrator
2014 LT program car, Pull Me Over Red, 1.4T Auto
Joined
·
14,165 Posts
Okay so I’ve been seeing everywhere that spark plug gap should be .027-.028 but acdelco spark plugs come out the package at .023, are pre gapped and say to not re gap, so now I’m confused what gap should it actually be.
 

· Registered
2016 Cruze Limited
Joined
·
35 Posts
If you're running higher boost, you may want to consider a somewhat smaller gap. I run 28 thou' on my Mk6 GTI pushing 19psi, I'm considering going to 24.

It's worth noting that the gap will open up with time, simply from heat cycles and bending of the ground strap. With copper plugs, there's also erosion of the electrodes, but with newer iridium plugs, this isn't a problem - the plugs themselves should be good for 100k miles, easily.

ACDelco 41-153 are copper, -156 are iridium.
 
1 - 11 of 11 Posts
Top