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Old 06-10-2009, 05:14 PM   #1 (permalink)
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:?

i've got a couple thousand clicks to go until i hit 48k kms and it's time to swap the pluggies, so i ordered some up w/ my amsoil purchase & i want to gap them properly before i install them.

what's the spec?

and why isn't it in the book??
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Old 06-11-2009, 12:07 AM   #2 (permalink)
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That is right , the plug gap is not in the owners manual nor is it under the hood however it is in the shop manuals of which I have both volumes .So I guess this is your lucky day ,So here it is - 1.0- 1.1mm =(0.039-0.043) .Just a word of advice when you gap the new plugs make it a little tighter, I went with 0.041 myself. Hope this helps Good Luck.
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Old 06-11-2009, 01:43 AM   #3 (permalink)
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thanks

just gapped them so they'll be ready to install in a couple thousand clicks.
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Old 06-11-2009, 06:21 AM   #4 (permalink)
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I too want to do the same thing but I am unable to understand the process. Pls explain it in more detail.
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Old 06-11-2009, 12:15 PM   #5 (permalink)
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QUOTE (samabhi124 @ Jun 11 2009, 04:21 AM)
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I too want to do the same thing but I am unable to understand the process. Pls explain it in more detail.
bend the gap in the spark plug to the proper size. Honestly, if you don't understand the process of gapping a spark plug, you should get your plugs changed at the dealership. You might kill yourself or blow up something.
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Old 06-11-2009, 12:42 PM   #6 (permalink)
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QUOTE (ultragod @ Jun 11 2009, 12:15 PM)
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bend the gap in the spark plug to the proper size. Honestly, if you don't understand the process of gapping a spark plug, you should get your plugs changed at the dealership. You might kill yourself or blow up something.

I agree, If you don't understand any of what we are saying it's better that you take the car to someone that knows what they are doing, because if you damage one of your plug coils it will cost you alot of money to replace it !
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Old 06-11-2009, 10:19 PM   #7 (permalink)
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phew!!! i gapped at 42 so good enough.
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Old 06-11-2009, 11:48 PM   #8 (permalink)
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QUOTE (accent sport @ Jun 11 2009, 12:07 AM)
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That is right , the plug gap is not in the owners manual nor is it under the hood however it is in the shop manuals of which I have both volumes .So I guess this is your lucky day ,So here it is - 1.0- 1.1mm =(0.039-0.043) .Just a word of advice when you gap the new plugs make it a little tighter, I went with 0.041 myself. Hope this helps Good Luck.
why do you recommend gapping tighter than spec? the gap should be as large as the cylinder will allow without being blown out. The factory spec is already conservative to account for electrode wear. I cant see a good reason to gap even tighter.
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Old 06-12-2009, 12:07 AM   #9 (permalink)
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QUOTE (fonque @ Jun 11 2009, 10:48 PM)
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why do you recommend gapping tighter than spec? the gap should be as large as the cylinder will allow without being blown out. The factory spec is already conservative to account for electrode wear. I cant see a good reason to gap even tighter.

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3. Gapping

Since the gap size has a direct affect on the spark plug's tip temperature
and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings (to ensure ignitability
in these denser air/fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.

A spark plug's voltage requirement is directly proportionate to the gap size. The larger the gap, the more voltage is needed to bridge the gap. Most experienced tuners know that opening gaps up to present a larger spark to the air/fuel mixture maximizes burn efficiency. It is for this reason that most racers add high power ignition systems. The added power allows them to open the gap yet still provide a strong spark.

With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think.
http://www.ngksparkplugs.com/techinfo/spar...ion.asp#gapping
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Old 06-12-2009, 12:18 AM   #10 (permalink)
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i gapped them to .040-.041 approx

i hope that's ok for fuel efficiency, too

don't knock the guy who doesn't know how to do it... i knew how to use a feeler gauge, but had no idea how to adjust the gap. i took a couple guesses with a buddy of mine that ranged from some bit must turn to adjust it like a set screw, to bending the electrode manually... then i hit up youtube for a how to video and learned that you do in fact manually bend the electrode. i guess the simplest answer is the correct one in this case because this has been done for what, a hundred years?


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