Replacing Spark Plugs on 2003 Mitsubishi Eclipse

Wondering if it would be difficult for me to change my own spark plugs on this model. Im no mechanic but I def dont want to pay the $300 plus for this job.

by in Fairfield, OH on April 09, 2009
3 answers 2 comments
ANSWER by on April 10, 2009
I know replacing the spark plugs is a 2 1/2 hour job but is not really difficult. It would be best if you had a workshop manual and if you clearly mark things perhaps with a "sharpie" or "white out" and take pictures with a digital camera the job is not that complex.
ANSWER by on June 14, 2009
Replacing the plugs should take no longer than 1 hr. remove boots and wires, make sure you have the proper size spark plug socket and extension. Do not over tighten, as they will brake off inside, snug it tight. And may want to replace the wires at this time also.
COMMENT by on January 24, 2011
The OP stated he has a 3.o 6 cyl. 24 valve 3rd gen engine which requires the rear half of intake plenum to be removed to even access the back 3 spark plugs, reason just because it is open with all that has to be removed to even get there, esp. if you have the GTS as I do, you should change wires, timing belt, tensiioner/idler, and waterpump--if you ever have seen it you will agree it's actually cost effective because you will not be doing it again for another 60,000 miles, and all serpentine bests replaced, no matter, just because all that has to be removed anyway, hence less labor. Lastly, this is what is called an interferrance engine, which if timing belt would break or water pump seize up (waterpump acts like an idler for timing belt as well), the valves would get bent if that's all if you are lucky, because although a highly efficient engine, there's very little clearance between valve body and piston-cylinder head, whereas majority of engines are non-interferrance engine that uses a timing chain that actually needs extra clearance between aforementioned operating areas of combustion sequence. Timing belts are needed for interferrance (sp?) engine ]s and if you keep to exact maintenance schedule with this engine, using irridium NGK plugs, new wires of same quality, oil changes, long life coolant; you will only be spending this if you want to keep a really cool car and engine for 250,000+ years. It's not a Porsche nor is it a money-pit. PAY for qualified mechanic to do this and shop around on web/phone to different shops, avoiding the StealerShip/Dealer's Service Dept., unless you have deep pockets. Hope this clarified things and BTW the long life coolant is absolutely corrosion-free, lasting 100,000 miles and costs about few hundred bucks.
ANSWER by on May 10, 2010
where are spark plugs located on 24 valve mitsubishi 2005
COMMENT by on September 28, 2010
they are in the back under the intake manifold
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