holy spark plugs batman!
Teching In
Joined: Mar 2011
Posts: 48
Likes: 0
I checked my front four spark plugs. I have a 2006 Monte Carlo SS. The plug all the way to the right had a lot of oil on the threads but the rest of the plug looked pretty good. The other front three looked good and no oil on the threads. Is it bad to have oil on the thread of the plug in the front all the way to the right?
Last edited by nat120; Apr 16, 2011 at 10:31 PM.
Staging Lane
Joined: Aug 2012
Posts: 97
Likes: 0
From: 870 ARKANSAS
I bought my gxp 5 months ago has 153,000 miles and I have a misfire idk when the plugs and wires were last changed but my cars tore apart already for the tranny rebuild will I be ok just replacing plugs or should I replace wires to and is there anyway to know for sure?
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Either way it looks like it's gonna be a PITA. 
Staging Lane
Joined: Aug 2011
Posts: 62
Likes: 0
If youve changed plugs on a fwd before, this is 1-2h job max. Rocking the engine forward similar to 3.4 and 3.8 motors works with the fwd 5.3. It only gives 1-2 inches on the back but your knuckles will thank you. While your back there doing rear plugs, you might as well replace the 02 sensor if it needs it
THIS^^^
Staging Lane
Joined: Jun 2009
Posts: 63
Likes: 0
Changing transmission fluid/filter in the morning
Teching In
Joined: Apr 2011
Posts: 4
Likes: 0
Grand Prix GXP Plug Question 2008 Grand Prix GXP
Magna Flow Exhaust
CAI
All Other Equipment is stock
My question: If I intend to do a 3" downpipe, Transcooler, and potentially Thorley Headers, is there any harm with installing the NGK Iridium TR6IX right now? Will these plugs run ok with an almost stock setup?
I called Promax Performance, and the gentleman that answered stated that they generally run as cold a plug as possible when racing. The trade off with the LS4 is going to be either run a colder plug (TR6IX) and have more power, but less plug life, or go with factory recommendation (41-985) and have less power, but more life.
Hmmmm. Decisions, decisions.
Thanks.
stok2shok
Magna Flow Exhaust
CAI
All Other Equipment is stock
My question: If I intend to do a 3" downpipe, Transcooler, and potentially Thorley Headers, is there any harm with installing the NGK Iridium TR6IX right now? Will these plugs run ok with an almost stock setup?
I called Promax Performance, and the gentleman that answered stated that they generally run as cold a plug as possible when racing. The trade off with the LS4 is going to be either run a colder plug (TR6IX) and have more power, but less plug life, or go with factory recommendation (41-985) and have less power, but more life.
Hmmmm. Decisions, decisions.
Thanks.
stok2shok
Last edited by stok2shok; Jun 7, 2013 at 09:56 AM. Reason: additional info