Spark Plug Torque (NGK 7990)

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  #1  
Old 03-15-13, 12:45 PM
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Spark Plug Torque (NGK 7990)

I just replaced the spark plugs on my 2004 Toyota Tundra (V8) and have a question about the amount of torque to use on the spark plugs and what type I have. I used NGK BKR6EYA (7990) and the box says 18-21 ft-lbs for the gasket type for aluminum heads. I'm assuming this is the type I have since there is a metal washer on the base of the plug. The other option is a tapered seat which is torqued to 7-14 ft-lbs for aluminum heads. I'm assuming a tapered seat plug does not have a washer/gasket. Is this correct?
 
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  #2  
Old 03-15-13, 01:57 PM
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You are correct. The tapered seat plug does not use a gasket.
 
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Old 03-15-13, 02:04 PM
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Great. Thanks. Looks like I torqued them properly then, assuming I have aluminum heads. I found it curious that the torque for iron heads is less (7-14) than aluminum (18-21). I thought it would be the other way around.
 
  #4  
Old 03-16-13, 04:14 AM
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Mossman,

For future reference there is no need to torque down spark plugs. Just snug them down tight and don't get carried away with over-tightening.

Thank You
Amy
 
  #5  
Old 03-16-13, 04:48 AM
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I usually don't torque them, but the box has a torque chart so I went ahead and did so. I hand tightened them first and torquing them required another full turn (at least). Assuming I have aluminum heads (most current vehicles do correct?) I should be fine.
 
  #6  
Old 03-17-13, 04:15 AM
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If you have a good feel for tightening things it would not be ness. to torque them,but many people dont. With alum heads you dont want them farm tight.
 
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Old 03-17-13, 05:19 AM
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Mossman,

Sorry but I forgot to mention something. The first chance you get, you should remove all the plugs and put a coating of "Anti-Seize Compound" on the threads of the plugs then reinstall them. Doing so will make removing the plugs in the future easier, and eliminates the possibility of stripped plug holes.

Thank You
Amy
 
  #8  
Old 03-17-13, 07:17 AM
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Yes, I used anti-sieze compound.
 
  #9  
Old 03-17-13, 12:05 PM
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Nice going Mossman

Thank You
Amy
 
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Old 03-17-13, 01:13 PM
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