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  #1  
Old 12-12-2007, 09:30 PM
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When do I need to replace the spark plugs?!?

hello guys...

got a noob question here...
I have done some search but i cant seem to find the answer...


at what mileage or timeline do I need to replace the spark plugs for my 2004 G35 5AT??

I have looked through the service manual as well as Infiniti help website but neither one indicates the time/mileage when the spark plugs need to be replaced....

is it something that's totall up to owner's choice?!

and also.. what benefit would it give to me to replace the spark plugs?? bettter gas mileage, gaining loss hps?????

and last question.. What's a reasonable price to have someone other than the dealership done the job for me (labor + parts)......


thanks in advance for your inputs...
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Last edited by Smartidiot; 12-12-2007 at 11:31 PM.
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  #2  
Old 12-12-2007, 10:06 PM
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This link states to change your plugs at 108,000km. Its from Oakville Infiniti.

Service Schedule from the dealer
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  #3  
Old 12-12-2007, 10:17 PM
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Quote:
Originally Posted by 35bills
This link states to change your plugs at 108,000km. Its from Oakville Infiniti.

Service Schedule from the dealer

Thanks Sir,

that bill seems kidda informal.. but i will take it...

so do you have any ideas what benefit would replacing spark plugs give me??... and also.. how much would it cost me (incl. parts and labor)?!?

thanks again......
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  #4  
Old 12-12-2007, 11:27 PM
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I would say it should improve your gas mileage and performance.
If you can't change them yourself just give the Dealer a call they will be glad to give a quote on parts and labor.
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  #5  
Old 12-13-2007, 11:31 AM
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Interesting, I wonder how difficult it is as a DIY. I haven't searched for a DIY, but offhand I'd comment that it looks TIGHT in that engine bay! Not like in my ole Chev pickup where I could sit on the inner fender and change 'em.
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Old 12-13-2007, 12:14 PM
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There likely won't be any real benefit unless your mileage is up at or over the suggested plug replacement interval. I don't have my car/manual at home to confirm that suggestion. Many cars today go 160km before needing plugs replaced.
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  #7  
Old 12-13-2007, 07:52 PM
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Quote:
Originally Posted by SwivelMan
Interesting, I wonder how difficult it is as a DIY. I haven't searched for a DIY, but offhand I'd comment that it looks TIGHT in that engine bay! Not like in my ole Chev pickup where I could sit on the inner fender and change 'em.

It's tight alright and the coil on plug makes it even more difficult. It is do-able with a little experience and patience, tho.

Altho the manufacturer recommends changing them at about 100k, I'd change them at 50-60k for optimum performance (read gas mileage) since by 100k plugs will be well past their peak.

LOL, with gas prices rising the way they are these days, and the expected 'skyrocket' by spring, it would seem a prudent investment.

A caution: If you do the change yourself, be very careful removing the old plugs. They've been sitting in aluminum heads for years and many kilometers and could easily break or damage delicate threads.

Don't forget a coating of anti-seize on the new threads to help with their eventual removal.

C.
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  #8  
Old 12-14-2007, 11:13 AM
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^^ Thanks, Colin, good advice as always.
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  #9  
Old 12-14-2007, 11:16 AM
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Is there any point of going aftermarket or should I just get OEM ones from the dealership?
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  #10  
Old 12-14-2007, 12:46 PM
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Quote:
Originally Posted by fullvietFX
Is there any point of going aftermarket or should I just get OEM ones from the dealership?
I'd stay with OEM's, but many like the new Iridium plugs if you don't mind the extra cost.
Make sure you get the proper heat-range....

C.
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  #11  
Old 12-14-2007, 01:08 PM
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^all good advice you've offered Colin.

I noted a 5 beside the plugs service on the checklist attachment. Do you think that is the stealer labour for changing the plugs? I could see one or two.
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  #12  
Old 12-14-2007, 02:21 PM
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Quote:
Originally Posted by RBull
^all good advice you've offered Colin.

I noted a 5 beside the plugs service on the checklist attachment. Do you think that is the stealer labour for changing the plugs? I could see one or two.
LOL, Deane.....no doubt that's about what they'd charge......
I took my Coupe plugs out once to check the threads and gap and it took me a good 2hrs due to plumbing and such.

C.
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Old 12-14-2007, 03:05 PM
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Quote:
Originally Posted by Msedanman
LOL, Deane.....no doubt that's about what they'd charge......
I took my Coupe plugs out once to check the threads and gap and it took me a good 2hrs due to plumbing and such.

C.
um.. so what does that 5 mean on the service bill? 5 unit of labor or 5 hours??

because if it is 5 hours of labor and they are charing around $95/hour.. then i am looking at around $475 for the labor and say $50 for the parts..and that's ridiculous..
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Old 12-14-2007, 03:52 PM
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Quote:
Originally Posted by Smartidiot
um.. so what does that 5 mean on the service bill? 5 unit of labor or 5 hours??

because if it is 5 hours of labor and they are charing around $95/hour.. then i am looking at around $475 for the labor and say $50 for the parts..and that's ridiculous..
Not sure what 5 units of labour is unless their units are broken into say 10 minute blocks. would call and ask about the labour for plugs. They'll likely have a flat rate for something like that.
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Old 12-14-2007, 03:52 PM
 
 
 
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