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#1 Old 07-16-2012, 01:07 PM
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tune-up

Hey guys i have 2004 2.7 litre v6 with 56000 km i think it still has original sparkplugs and air filter, should i replace the plugs i think im gonna get a k&n performance filter for it would this fit?
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#2 Old 07-17-2012, 06:57 PM
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Just my opinion but kn is not going to do much for you. And if you are on the original air filter I think you are over do.
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#3 Old 07-18-2012, 07:56 AM
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Get a new standard air filter from a repotable manufacturer. The oil used in these K&N junk things is known to harm air mass flow meters (hot film type) by depositing there.
Plugs are to be replaced after 90'km.
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#4 Old 07-19-2012, 12:58 AM
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K&Ns also allow much more dirt into the engine than a pleated paper filter does. They have a great advertising department though :-).
Along with the "higher air flow" comes the dirt... There are negative reviews out there on these filters "if" you look... 2~3 extra HP is not worth it..
Dave
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#5 Old 08-10-2012, 11:38 AM
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silversonatasurfer
What about removing the intake plenum when changing the rear plugs? Any of you have trouble with this? I am tuning up this weekend and am interested to see if anyone has had problems with it.
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#6 Old 08-10-2012, 12:30 PM
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Chloe2002
i have a write up posted somewhere on here for the spark plugs/ intake plenum but it's easiest to do a google search. there's a good one with pics on importshark for the tiburon v6 *similiar enough to your v6* and an exact copy write up for the santa fe, again with pictures. skip the intake, it wont do anything. make sure you use iridium plugs, spend the extra cash, the car will run like complete junk with platinums/copper
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#7 Old 08-10-2012, 08:59 PM
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I did my daughter's 04 2.7L a few months back.. If you are reasonably mechanically inclined it is not bad... There are two or three bolts hidden behind the engine that hold the throttle body and they can be a challenge to remove and replace. The plenum has a gasket between itself and the head and it might get damaged when the plenum comes off.. You might want to get one before tackling the job.
I was able to remove the bolts and lift and support the plenum high enough to gain access to the plugs and wires (i replaced both at 115k miles). The back 3 had never been touched at the dealership but the front ones looked like new..Looks like they collected the money from the original buyer and didn't do the total job... The back plugs had no center electrodes left.
Use NGK plugs and use iridium plugs if you plan on keeping the car another 100k miles...otherwise platinum ones will last another 60k. Stay away from copper as the labor involved in replacing them in 30k...it's just not worth it.
Hyundai/KIA engines do not like "specialty" electrode plugs...NGKs work just fine. Keep you original air box and use a good pleated paper filter.
Dave
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#8 Old 08-10-2012, 09:15 PM
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Quote:
Originally Posted by MyKids04Sonata View Post
The back 3 had never been touched at the dealership but the front ones looked like new..Looks like they collected the money from the original buyer and didn't do the total job... The back plugs had no center electrodes left.
Normal at 60,000+,,, 2.7 and 3.5 destroy the center electrode on 1 bank,,, dont know why

Dave
NGK IRIDIUM and factory Hyundai wire set, and a plenum gasket for re-assembly.

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#9 Old 08-10-2012, 09:57 PM
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SBR711...
is this you saying "Normal at 60,000+,,, 2.7 and 3.5 destroy the center electrode on 1 bank,,, dont know why "???
It was inside what I said...
I agree with your
"NGK IRIDIUM and factory Hyundai wire set, and a plenum gasket for re-assembly."

Never seen this posted about bank 1 on kia-forums.com for the 2.7L "Optima" and I follow it closely being a mod there...Just curious.
The plugs I took out in the back were of a different code dating also and physically were darker on the porcelain (aged??) .
Dave
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#10 Old 08-10-2012, 10:07 PM
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Chloe2002
that is weird. I used NGK iridiums from rock auto and a set of Bosch wires from autozone. gasket came from rock auto too. the only pain is the center bolt on the back of intake plenum, otherwise make sure everything lines back up and bolt it down nice and snug a d you're good to go
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