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2007 RDX spark plug help

 
Old 06-28-2019, 09:37 PM
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2007 RDX spark plug help

Just picked up a used RDX yesterday and I'm changing out plugs. I'm not a mechanic but generally not inept either. I can't get the plug to fit into the 5/8" socket for some reason. I've tried 3 sockets. Never had an RDX before....is there some special trick? I'm obviously missing something.
Thanks in advance!
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Old 06-29-2019, 01:07 AM
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Figured it out

5/8" spark plug socket was too big. Took 9/16 socket for installed plug. New iridium plug was standard 5/8. Must be an Acura thing???
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Old 07-01-2019, 12:18 PM
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Double check your plugs, make sure you got the right ones. Some websites list plugs as fitting the RDX, but are the wrong gap. The OEM replacement plugs should fit the exact same socket. If not OEM, just make sure the gap is the same and you should still be good.

For example, Amazon will tell you that a Denso Iridium 3444 plug fits the RDX, which it technically does, but the gap on that plug is .044 inches, while the gap on the OEM NGK plug is .032 inches. Too large of a gap and you'll likely get misfires under heavy engine load.

Last edited by Tomtwtwtw; 07-01-2019 at 12:27 PM.
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Old 07-02-2019, 11:20 AM
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5/8 socket should be the correct socket to use, assuming you purchased the right plugs.

I completed this swap in January. See below:
https://acurazine.com/forums/first-g.../#post16374612
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Old 07-02-2019, 11:26 AM
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Originally Posted by DixieRDXTSX View Post
5/8" spark plug socket was too big. Took 9/16 socket for installed plug. New iridium plug was standard 5/8. Must be an Acura thing???
yeah, the previous installed plug was the wrong one
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Old 07-09-2019, 03:04 AM
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NGK plugs & coils all day
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