2001 Other Jeep Models spark plugs

Tiny
JIM FRY
  • MEMBER
  • 2001 JEEP
Engine Performance problem
2001 Other Jeep Models V8 Four Wheel Drive 102.00 miles

where are they and how do change them on 4.7 grand cherokee.
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Saturday, May 22nd, 2010 AT 7:13 PM

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Tiny
RASMATAZ
  • MEMBER
The spark plugs are located below the coil rail assembly.

SPARK PLUG REMOVAL
On this engine, each individual spark plug is located under each ignition coil.

1.In this Engine: Prior to removing spark plug, spray compressed air around base of ignition coil at cylinder head. This will help prevent foreign material from entering combustion chamber.
2.On this engine each individual ignition coil must be removed to gain access to each spark plug. Refer to Ignition Coil Removal/installation.
3.Remove spark plug from cylinder head using a quality socket with a rubber or foam insert. If equipped with a this engine, also check condition of coil O-ring and replace as necessary.
4.Inspect spark plug condition. Refer to Spark Plug Conditions.

CLEANING SPARK PLUGS
The plugs may be cleaned using commercially available spark plug cleaning equipment. After cleaning, file center electrode flat with a small point file or jewelers file before adjusting gap.

CAUTION: Never use a motorized wire wheel brush to clean spark plugs. Metallic deposits will remain on spark plug insulator and will cause plug misfire.

SPARK PLUG INSTALLATION

CAUTION: This engine is equipped with copper core ground electrode spark plugs. They must be replaced with the same type/number spark plug as the original. If another spark plug is substituted, pre-ignition will result.

Special care should be taken when installing spark plugs into cylinder head spark plug wells. Be sure plugs do not drop into plug wells as ground straps may be bent resulting in a change in plug gap, or electrodes can be damaged.

Always tighten spark plugs to specified torque. Over tightening can cause distortion resulting in a change in spark plug gap or a cracked porcelain insulator.

1.Start spark plug into cylinder head by hand to avoid cross threading.
2.In this Engine: Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
3.In this Engine: Before installing coil(s), check condition of coil O-ring and replace as necessary. To aid in coil installation, apply silicone to coil O-ring.
4.Install ignition coil(s). Refer to Ignition Coil Removal/installation.

http://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Saturday, May 22nd, 2010 AT 7:28 PM

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