Spark Plug Gap Confussion?

[Dave]

Mechanic may be correct. The NGK's should come already gapped at .040
Still worth checking though.

I used the NGK's and they were gapped at .040 but I always check anyway so I was sure they were right when I put them in.

Dave

 

[LibertyTC]

I checked the plugs that the dealer installed during the tune-up. I too thought NKGs came gapped at .040. Even though this is the case, I have always been in the habit of checking the gap when I install. If the technician had been in the same habit, he would have realized that these NKGs were gapped at .030. I re-gapped the plugs to .040. Jeep is running much smoother now. I feel better that I know for sure the gap setting. I, also, checked the throttle body. Not a lot of carbon. I think the gap setting resolved the rough idle.

Excellent that you checked the gap! Might want to tell the dealer what you found...
Now find a bottle of Chevron Tecron and take it for a good highway boogie!!
I always check the gap on each new plug before install too, some are out a bit.

 

[Jeep-I-Joe]

Excellent that you checked the gap! Might want to tell the dealer what you found...
Now find a bottle of Chevron Tecron and take it for a good highway boogie!!
I always check the gap on each new plug before install too, some are out a bit.

Yeah, it doesn't take much to knock then out of gap either.

 

[sharpy]

I called the Chrysler dealer today and asked them about the spark plug gap for the NGK
Platinum plugs I bought...
(According to the instructions on the NGK plug carton, it says not to regap the plugs!)
The mechanic I spoke to at Chrysler said to just install them without re-gapping them!

some beleive that gapping PLATINUM plugs will ruin them and cause them to wear faster. i check em anyhoo ....have yet to find one that was significantly off spec.

 

[Jeep-I-Joe]

some beleive that gapping PLATINUM plugs will ruin them and cause them to wear faster. i check em anyhoo ....have yet to find one that was significantly off spec.

So, do you think mine wer gapped that way intentionally on accident?:-s

 

[osufans]

some beleive that gapping PLATINUM plugs will ruin them and cause them to wear faster. i check em anyhoo ....have yet to find one that was significantly off spec.

yeah, that's what i have heard too, which is why i just left mine as they were. i stated earlier that they were autolites, but i saw someone else mention they bought champion plats that were gapped at .044"...that may have been what i used...can't recall for certain at the moment...guess i'm starting to get old...hehe