Spark plug question
 

Hi guys
The factory spark plugs for the 7th generation Maxima is Denso FXE22HR11. I'm hearing these do not need to be gapped and are pre gapped to spec is this true that these are already gapped out of the box or do they need to be gapped?

Thank You

Most likely they are pre-gapped. But it would be good to double check them before installing and it only takes a second. .043-.055" (1.1 - 1.4mm)

The FSM even states to NOT play with the gap. Checking it wouldn't hurt anything though. There are those people who go by the book, while other swear that they will never install another spark plug again without checking/gapping.

I replaced mine a thousand miles ago and used those same exact plugs and did not gap or even check them. Runs great. Just watch your tightening torque. When steel threads fight with aluminum threads the steel will always win if you're not cautious.

I went with NGK Laser Iridium plugs on mine Part # DILKAR7B11. Does not need to be adjusted. Just change them out after the car has been sitting for several hours (overnight). The layers of metal retain heat and cause the metal to expand / contract at different rates (Thermal expansion). It's best to change plugs on a cold engine.

I replaced mine and didn't gap them because I was told by the place I bought the OEM plugs from to not gap them, The car runs excellent just had some people telling me they should have been gapped so I figured I would ask around here and see what others have to say about it..

When in doubt, FSM.

I agree!

Sorry to bump this thread. I have a 2014 Maxima SV, with 150k. I need to do the plugs and coils on, so I bought the Denso FXE22HR11, new plugs from a local auto parts store. They were pre Gapped at like .30 - .35.

Seems Nissan says Denso gap should be .043-.055. So I Gaped them at .40 to split hairs. What is the correct Gap? This is very confusing. Normally the Denso's are already pre Gaped for the car> Anyone please??????? Thanks.

These fine electrode spark plugs can be permanently damaged by gapping them.

That is correct. I've always just put them on fresh out the box and have had no issues.

x-2

I do appreciate all the answer post. But I am asking if anyone knows what is the correct spec Gap? Plugs can be Gaped correctly without damage. Even Denso and other plug makers say they can be. So does anyone know if they should be Gap's at the Nissan spec? Thanks.

Per alldata .043 to 055