Just an FYI on Anti-Seize on Sparkplugs
#2
I saw that NGK Tech Bulletin when I changed my plugs last fall. I decided to use a small amount of aluminum head spark plug anti-seize anyway, and torque to the service manual spec of 11 ft-lbs. When they torqued up they seemed just fine - ie, they snugged up quick and 11 ft-lbs gave them just a little more rotation.
#5
The Scammer Hammer
iTrader: (49)
Damn. Guess I better change mine out. I used anti-seize, pretty sure I far surpassed 11ftlbs too. By A lot. I use German torque specs for damn near everything.
I guess the TR55's have the special coating....
Also, I see the compressed gasket in the bulliten. We don't have that, as we have tapered plugs. I wonder how that affects things, if at all.
I guess the TR55's have the special coating....
Also, I see the compressed gasket in the bulliten. We don't have that, as we have tapered plugs. I wonder how that affects things, if at all.
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#8
#9
#10
Tapered Seat with Aluminum Heads
7 to 14 ft-lbs (note GM spec of 11 is mid-range)
or
Hand tight (snug) + 1/16 to 1/8 turn
In this case, "hand tight (snug)" means when the taper on the plug just seats in the head by finger tightening.
Last edited by ZeeOSix; 04-15-2012 at 02:20 AM.
#13
TECH Senior Member
11 ftbs is 1/8 of a turn or less from when the plugs taper touches... they need to be barely snug, they will stay in.
I still would use a small amount of antiseize.
I still would use a small amount of antiseize.
#15
anitiseize
we change plugs every pass when tuning in our big motors(780",706"), probably 70 sets or more last year. always with antiseize and never once had a problem. you can feel the gasket compress if you take your time.......plugs from the bulletin look like someone didn't know wtf they where doing.......
#18
I'm looking at the package of some Permatex (Loctite Corp) anti-seize and it says to torque to manufacture's specs ... so apparently they are not worried about the torque spec being very far off when using the anti-seize.
#20
TECH Apprentice
I hold the ratchet with my thumb around the head and my hand has about 3-4 inches of the ratchet in it is all and tighten pretty firmly. They make spark plug ratchets, little stubby dudes only about 5 inches long total.