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5.3 spark plugs

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Posted 27 January 2003 - 05:04 AM

thinking of replacing the plugs. what brands are popular? thx
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#2 Markd


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Posted 27 January 2003 - 06:41 AM


"Better to remain silent and be thought a fool than to speak out and remove all doubt"


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#3 Threejaws



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Posted 27 January 2003 - 08:54 AM

I agree with Mark D, go with NGK.Lifted 2003, 2500HD
Lifted 2003, 2500HD2003 Silverado 2500HD with a 6in Superlift, on 315-75-16's mounted on KMC Tank wheels, dual exaust, Airforce One intake, powered by a 6.0 and 4.10. Posted Image

#4 TarheelZ



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Posted 27 January 2003 - 09:42 AM

I just replaced mine with Champion Copper Plus...so far, I'm happy with the results.

#5 BellevueSilvy



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Posted 27 January 2003 - 11:28 AM

Same here champion copper plus good results so far.
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#6 cyrylyn



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Posted 28 January 2003 - 10:24 PM

NGK.  I got them, but haven't put them in yet (waiting for MSD Wires).  Champion Coppers will melt if you live in a place like CA where gasoline by law has oxygenates in it. :cheers:  Gotta get Iridium tipped plugs.

#7 TxDoc


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Posted 28 January 2003 - 10:39 PM

Your 5.3 may already have NGK.  I had no idea. I contacted NGK about what plug they made was best for my truck--" Got a call from NGK today.  The 5.3L comes with either an NGK or a Denso. Pulling a plug will tell.  The NGK is a  PZTRSA15 with a 0.060 gap. the Denso is a PTJ4R15 (I think, or a PTJ14R15). "

The plugs have been tested to 150,000 miles and he said they should be fine to 100,000.  I asked him when he would change them in his truck. He said, pull them and check, but 100,000 is definitely not too long.

NGK post info