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NGK Iridium spark plug or Acdelco

When I did my plugs I went with the AC Delcos.
The 5.3 limes the OEM plugs better than just about anything else.
Just make sure to use some anti-sieze when reinstalling. You won't regret it.
 
Agree with jmuller62 about the AC Delco plugs. Why not use what the GM engineers decided that is best for your engine? When you use the anti-sieze just put a small stripe down the length of the threads and as you spin the plug in the hole it will coat the female threads in the head and make sure not to over tighten and not under tighten.  :wave:
 
raiderron said:
Why not use what the GM engineers decided that is best for your engine?

Because engineers many times get trumped by bean counters.  Just because it's what GM used doesn't make it the best for the job - often it's the cheapest that will give satisfactory performance.
 
The way I figure it, they put in what they know will work correctly over at least the warranty period and the recommended time interval of the maintenance schedule. If a certain engine in the GM corral needs a certain plug to work a certain way during operation then that plug is designed for it to work at optimum efficiency. The other plug manufacturers design their plugs to work in more than one engine so that they can cover more engine applications and make THEIR BEAN COUNTERS HAPPY. Again, just my $.02.  :wave:
 
We know the AC work for 100,000 miles. We know that Bosch and E3 DO NOT work well in the 5.3.

The NGK are fine as long as they are the single electrode.

Avalon
 
I think also if the engineer put ac delco is not for the performance just for the money gain,

What you mean by anti sieze?  Easier disassembly? Correct?
 
Anti-seize should be used when threading a non-aluminum bolt or other item, such as a spark plug, into something aluminum, like our engines' aluminum heads.  The dissimilar metals can accelerate corrosion and make it hard to remove the spark plug or bolt.
 
I have used anti-seize for years. Read a TEC pdf on it causing the shorting it talked about how to apply. It is posted on the site some where. Well searching more I have found these articles. I now use it sparingly where it is appropriate.
The Bosh post is good info on plugs in general. Spark plugs are where I?m not brand loyal I search and will use different plugs until I get the best over all performance for each engine. Tried a few different plugs for my AVY and then flowed the wisdom given here I now stay with AC. I did have a parts guy tell me NGK makes AC plugs ???
On the type; Iridium, Platinum, or good old Copper. The exotics for longevity Copper if like changing plugs.

http://www.ngksparkplugs.com/pdf/tb-0630111antisieze.pdf

http://news.thomasnet.com/companystory/The-Proper-Selection-and-Application-of-Anti-Seize-Compounds-613808

http://www.fjrforum.com/forum/index.php?showtopic=142977

http://mdm.boschwebservices.com/vpf-media/SparkPlugs/PDF/Catalog_Spark_Plugs.pdf
 
(y)
i would like take the tr55ix, but is curious when i check the fittment on ebay, is notified no compatible :rolleyes:
Does exist different type of tr55ix

http://www.ebay.com/itm/4-NGK-TR55IX-FORD-GM-Iridium-Spark-Plugs-7397-Pre-Gapped-Upgrade-More-Spark-/400446179475?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d3c73c893&vxp=mtr


But these look ok

http://www.ebay.com/itm/Set-of-4-Jaguar-Lincoln-Mercury-Pontiac-Grand-Grand-Trans-Sport-Spark-Plugs-/200774769695?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A2002%7CMake%3AChevrolet%7CModel%3AAvalanche+1500%7CSubmodel%3AZ71%7CEngine+-+Liter_Display%3A5.3L&hash=item2ebf1bdc1f&vxp=mtr
 
http://www.ngksparkplugs.com/part_finder/car_truck_suv/default.asp?mode=nml
 
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