Changing Plugs and COPs
04-29-2009, 06:50 PM
#1
5th Gear Member
Thread Starter
Join Date: Mar 2008
Location: Ohio
Posts: 2,994
Changing Plugs and COPs
Hey, simple one here guys-
I found a cracked/damaged coil pack the other day(got my engine bay a little wet cleaning it) and this finally explains the entirely random suttle miss i would hear now and then. So i ordered a new set and i ordered some ngk tr55 plugs while i was at it. My car has 75k on it so i figured i might just as well change em all out. So my question is this, does anyone know what the tr-55s come gapped at? Is the factory something like 52 thousandths? i cant remember, i just want to double check before i do this tomorrow. Also, anything else i should check on while im in there? Keep in mind i have 75k on the clock. Any input would be appreciated! Thanks guys!
I found a cracked/damaged coil pack the other day(got my engine bay a little wet cleaning it) and this finally explains the entirely random suttle miss i would hear now and then. So i ordered a new set and i ordered some ngk tr55 plugs while i was at it. My car has 75k on it so i figured i might just as well change em all out. So my question is this, does anyone know what the tr-55s come gapped at? Is the factory something like 52 thousandths? i cant remember, i just want to double check before i do this tomorrow. Also, anything else i should check on while im in there? Keep in mind i have 75k on the clock. Any input would be appreciated! Thanks guys!
04-30-2009, 12:31 AM
#2
1st Gear Member
Join Date: Feb 2009
Location: Texas
Posts: 138
plugs should already be gapped .54 but always recheck to make sure. And make sure you buy a decent gapper or at least not a flawed one. I bought a dollar gap key ring at autozone...It seemed odd that all my ngks were out of gap from box...then... i found my real another gapper that i used to use and apparently the autozone one was crap or at least the one i bought was flawed. The autozone i was gapping at .54 and checked with my good one and it was showing .65 N E ways, if your motor is a bit dirty...hit it up with a vacuum around the cops so crap don't fall in holes. Vacuum around cops...pull cop...then vacuum again and inside hole...then remove plug and replace
04-30-2009, 03:46 PM
#3
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
...it is a popular misconception that plugs are pre-gapped from the factory,\...
The factory spec for platinum plugs is 0.054", however if you are using conventional plugs I'd tighten that up a bit to 0.045" or so. The smaller tip of the platinum plugs allows the gap to ionise at lower voltages than the fat, square end of typical tungsten electrode plugs.
04-30-2009, 06:43 PM
#4
5th Gear Member
Thread Starter
Join Date: Mar 2008
Location: Ohio
Posts: 2,994
From NGKs FAQ (click here)...
The factory spec for platinum plugs is 0.054", however if you are using conventional plugs I'd tighten that up a bit to 0.045" or so. The smaller tip of the platinum plugs allows the gap to ionise at lower voltages than the fat, square end of typical tungsten electrode plugs.
The factory spec for platinum plugs is 0.054", however if you are using conventional plugs I'd tighten that up a bit to 0.045" or so. The smaller tip of the platinum plugs allows the gap to ionise at lower voltages than the fat, square end of typical tungsten electrode plugs.
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