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D17 Gas 4 Cyl. Hotter Spark Plugs.


 
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eye4iron
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PostPosted: Sun Feb 10, 2019 7:26 pm    Post subject: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

What is a good recommended hotter spark plug for a D17 gas 4 cyl..? I have one plug that will oil foul about once a year. I believe I can pull the valve cover at a latter date and install some valve guide seals to limit the oil fouling.
But until then I would like to run a hotter plug. Any suggestions or advice.
 
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Aaron SEIA
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Location: SE Iowa

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PostPosted: Mon Feb 11, 2019 3:47 am    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

Does yours have the 3/8" plugs, or the 3/4"?
AaronSEIA
 
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DrAllis
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PostPosted: Mon Feb 11, 2019 5:25 am    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

AC Delco R46 or R47 for the 3/8" length and AC Delco R46XL or R46XLS or R47XL or R47XLS for the 3/4" length.
 
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eye4iron
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PostPosted: Mon Feb 11, 2019 9:24 am    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

Thanks for the replies.
They are the 3/4? reach.
Dr. Allis. Are those plug numbers stock or a hotter range.
 
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Aaron SEIA
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PostPosted: Mon Feb 11, 2019 9:54 am    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

The XL's are the 3/4" and the 46 is one notch hotter than standard.
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jfreed
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PostPosted: Mon Feb 11, 2019 4:08 pm    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

Don't know About the "stock" number, but have learned that the smaller the number, the hotter the plug.
 
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DrAllis
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PostPosted: Tue Feb 12, 2019 5:44 am    Post subject: Re: D17 Gas 4 Cyl. Hotter Spark Plugs. Reply to specific post Reply with quote

CVPost-jfreed wrote:
(quoted from post at 17:08:07 02/11/19) Don't know About the "stock" number, but have learned that the smaller the number, the hotter the plug.
Well, that isn't the case with AC Delco plugs. 45XL is stock. 46-47-48's are all HOTTER.
 
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