Originally Posted by srockrae
I have a 2011 5.7 Hemi Limited Grand Cherokee. I asked my dealer if they would put the NGK IR plugs in instead of the copper ones. They insisted that they had changed the head design in the newer Hemis and if you put the IR plugs in them it will burn up the cylinder heads. Said the IR gets way hotter. Sounds like bull but I did not want to risk it so I had them put the copper ones in.
What yall think?
I think you have a service advisor at yet another Jeep Dealership that truly has no idea what he is talking about!! IR plugs will burn up the cylinder heads?? How? Why? Maybe he's stuck in a time warp and is referring to pre 2009 Hemi's.... but I'm pretty sure none of those old hemi's made it into 2011+ WK2's.
These IR plugs have only one listed
application from NGK........ that is a Chrysler 5.7L hemi. They are OEM Mopar parts with the correct heat range as spec'ed by Chrysler to NGK for 5.7 L hemi V8's.
Changed the head design in the new Hemi's??
When did that happen.... from 2013 to 2014 models when Chrysler started installing them as OEM parts?? Really?
The IR plugs were first installed in Chrysler police package vehicles for 100K miles maintenance intervals. Chrysler made them OEM parts for all 2014 5.7L V8's to keep up with other manufacturers 100K miles maintenance schedule's.
These IR plugs are just a better quality longer life OEM NGK 100K mi plug vs. the OEM NGK 30K mi copper plugs.