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Denso left???NGK right??

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Old 09-05-2003, 04:50 PM
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Denso left???NGK right??
Does anyone know why toyota put ngks on the right bank and densos on the left of the 3.4 liter? Toyota doesnt know why. Maybe someone here knows. I sure dont know. Do you??
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Old 09-05-2003, 05:40 PM
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It's pretty common, but I have never heard a definitive answer as to why. Some have said that the plugs have different conductivity to offset the different distance of each bank from the coil packs, others have argued different heat ranges, but then you replace them all with one brand, all is well...
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Old 09-05-2003, 05:48 PM
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Another toyota mystery i guess. Thanks WATRD
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Old 09-05-2003, 07:11 PM
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Someone at Toyota is obsessive compulsive? Another of life's little mysteries...
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Old 09-05-2003, 08:38 PM
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I heard it had to do with the heads being assembled in different locations. Who knows?
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Old 09-05-2003, 08:40 PM
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Mine were all NGK
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Old 09-05-2003, 08:51 PM
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I heard it had to do with the heads being assembled in different locations. Who knows?
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Old 09-05-2003, 10:20 PM
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I would agree that it is from two different plants making and assembling the heads
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Old 09-06-2003, 10:30 AM
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well. I replaced the plugs with all denso plugs. They were the cheapest at Toyota by far. Cheaper at Toyota??? Go figure!!
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