Changed my plugs after 38k (PICS)

[johnny_vitz]

It is highly recommended not to by most manufacturers. I know you CAN, but it is more likely you'll damage it then set the proper gap. They almost all come with the exact gap your engine needs (vehicle specific applications). I've been told by our NGK rep not to gap them

[RedRide]

Originally Posted by johnny_vitz

It is highly recommended not to by most manufacturers. I know you CAN, but it is more likely you'll damage it then set the proper gap. They almost all come with the exact gap your engine needs (vehicle specific applications). I've been told by our NGK rep not to gap them

Yes, manufactures tell people not to gap them because they know there are many idiots out there who wont heed their advise about the center iridium electrode or may not even be aware of it.

In addition, the ground electrode is not iridium and will erode as quickly as most any other high quality plug. Remember the electrode wear on the performance plug?
Also, it is always prudent to check the gap on any new plug as there is always a possibility that one may not be set to specs.

You can't damage the plug unless you go in there like a bull in a china shop and ignore the warning about the center elrctrode. Remember the electrode is sturdy enought to withstand all the explosions for 100k miles.