Just for fun, I pulled one of my plugs. It's a 2015 RT with about 32000 miles. The plug is an NKG and gapped at .040. So it's not just Chase's plugs that don't have the "right" gap.So here's what I found during the change out.
So I'm betting you all might find that while the factory calls out for .043 gap, the factory is installing .040 gap as that is how the plugs are being shipped to FCA.
What's interesting is the plugs I removed were not a Taper design like my '06 Hemi has. They have a sealing ring, and mine were quite snug.I used Denso 5343 Iridium plugs which came with .044 gap. Didn't check what came out at the time with 44,800 miles on them.
The torque is 13 ft lbs or 18 nm
I just brought 16 new NGK laser iridium plugs and it said on box the would need to be gaped for each appication. Sop I don't know where to go from here? gap them to 0.43 or leave them at ..40 ???Just FYI .... 25 year master technician here. You are not supposed to mess with the manufacturer of the iridium plug’s gap setting. It is set to fire most efficiently, plus sliding the gap tool in the gap can damage the iridium coating.
I don’t see what you can’t gap them. I’d use the individual gapping slides vs the gapping wheel though just to avoid damaging the iridium coating.I just brought 16 new NGK laser iridium plugs and it said on box the would need to be gaped for each appication. Sop I don't know where to go from here? gap them to 0.43 or leave them at ..40 ???
I just brought some NGK Iridium plug for my Challenger and they were 0.40, reset them to .43 Does anyone what brand come from factory in the 2010 Challenger? Dealer told me MOpar plugs? I pesumed they were NGK like I pulled from it. The older copper core plugs.Just to add on install.
I used a 10" extension on the Driver side of the engine and was able to R&R all 8 on that side.
On the Passenger side of engine I used 2 3" extensions...but a single 4" extension would be perfect I believe for that bank.
NGK has a .044 gap recommendation for the 5.7L Hemi which I'm sure works just as well as the factory recommended .043.
Interesting they shipped at .040 though. I've always verified gap, but how many do especially on these fancy fine wire electrode plugs?