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Old 08-21-2014, 10:23 AM
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spark plug

I am needing new spark plugs for a 2006 Chevrolet HHR and I was wondering what the difference was between the AC DELCO 41-103 and 41-105. I don't see anyone selling the 41-103 like someone suggested I get.
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Old 08-21-2014, 10:30 AM
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I found the 41-103 plugs at Autozone and Advanced autoparts online like here

shop.advanceautoparts.com/p/acdelco...iridium...41-103/15650269-

it shows this fits the 2.4 liter engine for the 2006 model

the 41-105 shows for the 2.2 liter engine for the 2006 model
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Old 08-22-2014, 02:10 AM
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Good job Oldblue!

The 2006 2.2L Ecotec engine was a Generation I version of the power plant, hence the requirement for Iridium 41-105 plugs.

2007 and newer Ecotec engines use the revised Generation II block and cylinder head, hence a different plug number.

There are enough differences between the '06 and '07 Ecotec 2.2 engines, both minor and major, that the 2006 engines are really considered "stand alone" models.
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Old 08-22-2014, 11:27 AM
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So screw in the correct plugs and drive on!!
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