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Post Info TOPIC: spark plug tip evaluation


Veteran Member

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Posts: 52
Date:
spark plug tip evaluation


Anyone willing to assess these plugs for me?

 

spark plugs.jpg 

spark 2.jpg

 






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Canadian Poncho Superstar!

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Date:

No expert, but I'll be the first and I'd say they certainly all look acceptable, with 3 being the closest to just a wee bit of excess carbon.

 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


Veteran Member

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Posts: 52
Date:

That was my thought. 1,4,and 5 look really good. I broke the porcelain on one of them while i was checking. Have to replace it and was considering to do the other 5.

 

Thanks for the weigh in!

 

Roy

 



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Canadian Poncho Superstar!

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replace all 6 while you're at it.

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70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop
72 GMC Sierra

 

 



Uber Guru

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Date:

And may I suggest AC Delco plugs. Not a fan of Champions.



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Vincent Jr.



Poncho Master!

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Consider a can of Sea Foam in the gas tank and go for a good run. Then pull a couple of plugs again for a comparison.



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Cliff

Done Hurryin

Like the larger type for my eyes. 

 

 



Veteran Member

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Date:

seventy2plus2 wrote:

replace all 6 while you're at it.


 hahaha!



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Addicted!

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I think they all look petty good. If you are going to use any combustion chamber cleaner, Seafoam or anything that is designed to de-carbon the engine, I would put the old plugs back in for just a few miles and let them take the beating. Why abuse a new set? And yes, definitely go with AC Delco no other brand. Gap them and make sure the negative electrode is centered left to right so you get even fire. Many guys will just gap them but not check the side to side. Your plugs will fire better and last longer if you do.

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