2.4L Performance Tech 16 valve 172 hp EcoTec with 162 lb-ft of torque

Denso spark plug gap for HHR 2.4

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Old 03-20-2007, 07:47 PM
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Denso spark plug gap for HHR 2.4

I have ordered a set of Denso spark plugs (#IVT16 ) for my 2.4,can anyone tell me the correct gap .On their website they say 1.0 to 1.1 mm.Is this correct,thanks for your help.The Canuk!
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Old 03-20-2007, 07:50 PM
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Size:  13.5 KB to the site!!! No clue here, but someone will be sure to know.
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Old 03-20-2007, 08:18 PM
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Thanks,I am a newbie,I was a member of the other club before but I couldn`t understand the dues they wanted to collect so I switched and I am happy I did,this is a much better site.I just checked the Denso website and they give a gap of .044",I just have to check if this is equal to the 1.0 to 1.1 mm I talked about before.The Canuk!
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Old 03-21-2007, 08:02 AM
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Don't have a clue either. Surprised that noone has answered this yet!
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Old 03-21-2007, 08:53 AM
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0.044" = ~ 1.12 mm
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Old 03-21-2007, 12:05 PM
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Thanks for the answer,I guess I`ll go with .043" which should be very close to spec.The Canuk!
P.S. I`ll let you know how they work out performance wise.
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Old 03-28-2007, 07:10 PM
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Follow up on the Denso plugs,the car runs great with these new plugs ,feels very smooth on take-off and acceleration seems to be better,it`s hard to tell the engine is running at stop lights,I hope this helps others to make the jump to Denso,you can`t go wrong.The Canuk!!
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Old 03-28-2007, 07:24 PM
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Thanks for the info!
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Old 03-29-2007, 11:14 AM
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Originally Posted by HHRyup
Thanks,I am a newbie,I was a member of the other club before but I couldn`t understand the dues they wanted to collect so I switched and I am happy I did,this is a much better site.I just checked the Denso website and they give a gap of .044",I just have to check if this is equal to the 1.0 to 1.1 mm I talked about before.The Canuk!
The owners manual says to use a gap of 0.042 inch (1.06 mm).

It doesn't say if that is for all plug brands or if it is specific to AC Delco.
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Old 03-29-2007, 12:42 PM
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Let us know how the Denso plugs are. I switched to Autolite, as per recommendation from Mike (SoCal) and they are unbelievable. He did comparison tests and they were incredibly better than the stock AC plugs. I find it hard to believe that anything could be better, but I am certainly listening
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