Spark Plug Specs
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Joined: Feb 2007
Posts: 16,320
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From: Boynton Beach, FloriDuh
When I was taught how to do plugs back in the '70's, we gapped the plugs, cleaned up the threads on the head and then screwed in the plug until it was hand tight. At that point, we would turn the plug 1/4 turn and call it a day.
In all of the time that I did plugs, I think I only messed up one head doing that.
Now, I'm older and can afford decent tools. So, if the Service Manual calls for 12-18 ft lbs with a .038 to .043 gap, well, that's what my Talulah deserves and is going to get.
In all of the time that I did plugs, I think I only messed up one head doing that.
Now, I'm older and can afford decent tools. So, if the Service Manual calls for 12-18 ft lbs with a .038 to .043 gap, well, that's what my Talulah deserves and is going to get.
That's all I've ever done with spark plugs on any vehicle. Plugs should just be snugged enough to compress the crush washer, especially when you're screwing them into aluminum heads.
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