Vehicles: 2000 Kia Sportage 4-cylinder 2.0L MFI DOHC 1998-2002
They're hidden underneath the coil cover, which is partially obscured by the accelerator cable bracket, which is obstructed by the air intake.
They're accessed from the top of the engine.
If you don't have a compressed air line to blow dirt away from around the plugs before removing them, one may blow through a plastic drinking straw (while closing eyes), or use a can of compressed air (with a little red plastic straw) sold for use cleaning computer PC boards/keyboards.
Where the manual (below) says "carefully install the spark plug into the cylinder head", you may consider one or another of a couple of experienced mechanic's tricks (used to avoid cross-threading the plug thus damaging the head):
trick 1: start plug by putting plug onto the end of a piece of stiff-ish hose, and
start the threads by gently turning the end of the hose. Once plug has
safely started turning into its threads, switch to a spark plug socket.
trick 2: use the spark plug socket, but carefully start the plug by gently
turning the plug COUNTER-clockwise, until the plug drops a hair - at this
point you know you've found the start of the first thread. Then gently thread
the plug in clockwise.
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Spark Plugs - Removal & Installation
WARNING
Do not attempt to remove spark plugs when the engine is hot.
(1) Disconnect the negative battery cable.
(2) Remove the air intake hose assembly.
(3) Remove the accelerator cable bracket.
(4) Remove the six bolts and coil cover from cylinder head cover.
(5) Remove the four bolts and the two coils from the cover.
(6) Disconnect the high tension leads from the spark plugs by twisting the boot and removing.
(7) Use compressed air to remove any dirt from around the spark plug hole.
(8) Make sure the spark plug socket fits squarely on the spark plug, and then remove.
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To install:
(1) Be sure the spark plug gap is set to 0.039-0.043 in. (0.98-1.09mm).
(2) Apply anti-seize compound or light lubricating oil (WD-40 or 3-in-1) to the spark plug threads.
(3) Carefully install the spark plug into the cylinder head and torque to 11-17 ft. lbs. (23 Nm).
(4) Reconnect high tension leads to the spark plugs.
(5) Install the two ignition coils and torque four mounting bolts to 14-19 ft. lbs. (26 Nm).
(6) Install the coil cover and secure with six bolts
(7) Install the accelerator cable bracket.
(8) Reconnect the air intake hose assembly
(9) Reconnect the negative battery cable.
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