5.7 spark plug replacement - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 12 (permalink) Old 01-18-2010, 03:25 PM Thread Starter
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5.7 spark plug replacement

can i get some feedback my mechanic says i should put the platinum plugs instead of copper

also what is the real time to do the job not what the dealer quotes cuz thats just ridiculous

thanks in advance
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post #2 of 12 (permalink) Old 01-18-2010, 03:35 PM
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if your good with a tool kit about 16 mins max,they have tapered thread so you cant overtighten them,as we say in the UK piece of p1ss,lol(it takes about 16 mins cos you have 16 plugs)


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post #3 of 12 (permalink) Old 01-18-2010, 03:57 PM
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well took my dad like an hour i geuss hes slow. Oh well atleast hes cheap
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post #4 of 12 (permalink) Old 01-18-2010, 07:05 PM
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I would stick with the cooper,or the NGK,I have had both and no complaints at all,its not worth the $6 or $7 bucks per plug for the plat.if not more

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post #5 of 12 (permalink) Old 01-18-2010, 07:16 PM Thread Starter
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i did some contra for the plats and 1 hour worth of labour damn the dealers love ripping ppl off!! ya know i went to the dealer one time they said i need to change my trans fluid i said oh really how much? just a bit over 200 dollars.....did you know in the owners manual it say quote"unless your vehicle is being used as a taxi or police vehicle farm vehicle etc for the life of the vehicle you never have to change the tranny fluid" i told them that and their responce...well its dealer recommended!! how about this client recommended......take your tranny fluid and shove it up yer a$$!!!!!
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post #6 of 12 (permalink) Old 01-18-2010, 07:26 PM
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I changed mine myself. It took about an hour. I consider myself a better-than-average shadetree mechanic. Access to some of plugs requires various extensions and/or univeral joints, and/or removing some ancillary compenents. A torque wrench is a good idea to assure that the plugs are properly seated and to avoid stripping threads. Apply some never-seize lubricant to the threads to avoid them seizing before next replacement. I personally chose to go with double platinums (a buck or two each more than coppers) to avoid ever having to replace them again in my lifetime. Your lifetime may be different! LOL

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post #7 of 12 (permalink) Old 01-19-2010, 05:15 AM
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correct

yep, choose your plug by how often you want to play with them

Coppers are standard in the 5.7, run at least 30k miles, many have run way past that.

Upgrades include the NGK Iridiums in the 6.1, good for 105k miles per Chrysler.

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post #8 of 12 (permalink) Old 01-19-2010, 06:37 PM
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I have seen posts where it is claimed that the stock copper plugs are best with the MDS system. It could have to do with the copper plug properties working well with the cylinders being shut off, then resuming firing. There are lots of old threads talking about plugs if you want to search for them.

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post #9 of 12 (permalink) Old 01-20-2010, 05:15 AM
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baloney

As I have stated previously, 5.7's run great on any plug.

The copper plugs were a cost saving measure. The bean counters did it.

I have yet to find any other car sold in America that ships with copper plugs, and MANY of them have cylinder deactivation systems.
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post #10 of 12 (permalink) Old 01-20-2010, 09:24 PM
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Seems silly to save 50 bucks for a car that can sticker above $40k... but what the hell do I know? =/

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