Looking for location of spark plugs .
I believe that year had distributorless ignition, instead it uses a form of coil on plug ignition system.
If you open the hood, stand at the front of the vehicle. Look to the left side of the engine, around the bottom of the valve cover (The valve cover is where the oil fill cap is. The oil fill cap is on top of the valve cover), at the bottom of the valve cover on the left side you will see a series of humps. Those series of humps is the coil packs, the coil packs are all in one long piece held down by three or four bolts.
Take out those bolts, gently pry up at the ends of the coil pack and it will eventually come out. You'll see on the bottom side the spark plug boots are attached to the coil pack. After you get the ignition coil pack off, you will see the spark plugs under where the coil pack came from, the boots on the coil pack sit directly on the spark plugs.
They are on the passenger side of the engine. Remove the coil pack held in by four 10 mm bolts. Pull the coil pack off and voila, there are the spark plugs.
SOURCE: spark plugs location
What engine 6 cylinder? If yes you have to remove the coil rail on the passenger side of the cylinder head.
SOURCE: 2000 Jeep cherokee sport
On the left side of the engine if your looking from the front bumper. There should be six of them in a row. If all else fails follow the lines off of your distributor cap.
SOURCE: How do I locate the low side ac system connection
the low side is the smaller valve, and should have a blue cap on it... if not, look for 2 black capped valves, and the smaller on it is the low side.... the larger is the high side... hope this helps you....
SOURCE: where are the spark plugs located on a 2000 jeep
on passenger side of engine there is a long black box near valve cover this is your coilpack assembly if i,m not mistaken a few items will need to be removed so once you unbolt the box it will raise up and out then you will see your sparkplugs hope this helps if not contact me @ fixya
Locate the spark plug wires in the Cherokee cylinder head. In the 4.0 liter engine, the spark plugs are below the coil rail assembly. On the 4.7 liter engine, the spark plugs are located under each corresponding engine coil.
Read more: How to Replace Spark Plugs in a Jeep Grand Cherokee ' eHow.com http://www.ehow.com/how_4484626_replace-spark-plugs-jeep-grand.html#ixzz27zi6736d
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