Jeep WK Grand Cherokee Spark Plugs

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3.7-L V6 (2005-2010)
(commonplace on Laredo)
4.7-L V8 (2005-2007)
(commonplace on Limited, elective on Laredo)
4.7-L V8 (2008-2010)
(commonplace on Limited, elective on Laredo)
Type: ZFR6F-11G (NGK)Standard resistor-type

OEM P/N SPZFR6F11G

MSRP: $3.70 ea.

.042 in. hole

3/4″ attain, 5/8″ Hex head

Torque to twenty Ft. lbs.

 

Type: RC12MCC4“Fired in suppressor seal” spark plugs utilizing a copper core floor electrode.

OEM P/N SPRC12MCC4
(previously 56028236AA)

MSRP: $3.70 ea.

.040 in. hole

3/4″ attain, 5/8″ Hex head

Torque to twenty Ft. lbs.

(NOTE: The 4.7L V–8 engine is supplied with copper core floor electrode spark plugs. They should be changed with the identical sort/quantity spark plug as the unique. If one other spark plug is substituted, preignition will consequence.)

 

Type: FR8TE2 (consumption)
Type: FR8T1332 (exhaust)Bosch Nickel Yttrium plugs (consumption)
Bosch Iridium plugs (exhaust)OEM P/N SPFR8TE2AA (consumption aspect)
OEM P/N SPFR8TI332 (exhaust aspect)

MSRP: $4.60 ea. (consumption aspect)
MSRP $8.10 ea. (exhaust aspect)

.040 in. hole (consumption aspect)
.050 in. hole (exhaust aspect)

??” attain, 5/8″ Hex head

Torque to twenty Ft. lbs.

CAUTION: This engine makes use of TWO DIFFERENT sorts of spark plugs. A complete of 16 plugs is used. The plugs are mounted in two rows (banks). The higher row is used on the consumption valve aspect of the cylinder head. The decrease row is used on the exhaust valve aspect of the cylinder head. The higher row makes use of Bosch Nickel Yttrium plugs. The decrease row makes use of Bosch Iridium plugs. DO NOT INTERCHANGE THESE PLUGS.

 

 

5.7-L V8 HEMI (2005-2008)
(commonplace on Overland, elective on Limited)
5.7-L V8 HEMI VCT (2009-2010)
(commonplace on Overland, elective on Limited)
6.1-L V8 HEMI (2006-2010)
(commonplace on SRT8)
Type: RE14MCC4(Champion 570)

OEM P/N SPRE14MCC4

MSRP: $4.10 ea.

.045 in. hole

1″ attain, 5/8″ Hex head

Torque to 12-14 Ft. lbs.*

* Torque important tapered design. Do not exceed 15 ft. lbs.

 

Type: LZFR5C11G(NGK)

OEM P/N SPLZFR5C11

MSRP: $4.20 ea.

.040 in. hole

?” attain, 5/8″ Hex head

Torque to 12-14 Ft. lbs.*

* Torque important tapered design. Do not exceed 15 ft. lbs.

 

Type: PLZTR5A13(NGK Double-Platinum 4998)

OEM P/N SPLZTR5A13
(previously LCTR5A13A and 5037404AA)

MSRP: $11.45 ea.

.040 in. hole

1″ attain (25mm, .984″), 5/8″ Hex head, warmth vary 5

Torque to 12-14 Ft. lbs.*

* Torque important tapered design. Do not exceed 15 ft. lbs.

 

3.7L V-6 ENGINE

The 3.7L V-6 engine makes use of a separate ignition coil for every cylinder. The one-piece coil bolts on to the cylinder head. Rubber boots seal the secondary terminal ends of the coils to the highest of all 6 spark plugs. A separate electrical connector is used for every coil.

Because of coil design, spark plug cables (secondary cables) should not used. A distributor is just not used with the three.7L engine.

Two knock sensors (one for every cylinder financial institution) are used to assist management spark knock.

The Auto Shutdown (ASD) relay offers battery voltage to every ignition coil.

The ignition system consists of:

6 Spark Plugs
6 Separate Ignition Coils
2 Knock Sensors
Powertrain Control Module (PCM)
Also to be thought of a part of the ignition system are sure inputs from the Crankshaft Position, Camshaft Position, Throttle Position, 2 knock and MAP Sensors.

 

4.7L V-6 ENGINE (2005-2007)

The 4.7L V-8 engine makes use of a separate ignition coil for every cylinder. The one-piece coil bolts on to the cylinder head. Rubber boots seal the secondary terminal ends of the coils to the highest of all 8 spark plugs. A separate electrical connector is used for every coil.

Because of coil design, spark plug cables (secondary cables) should not used. A distributor is just not used with the 4.7L engine.

Two knock sensors (one for every cylinder financial institution) are used to assist management spark knock.

The Auto Shutdown (ASD) relay offers battery voltage to every ignition coil.

The ignition system consists of:

8 Spark Plugs
8 Separate Ignition Coils
2 Knock Sensors
Powertrain Control Module (PCM)
Also to be thought of a part of the ignition system are sure inputs from the Crankshaft Position, Camshaft Position, Throttle Position, 2 knock and MAP Sensors.

 

4.7L V-6 ENGINE (2008-2010)

The 4.7L V-8 engine makes use of a separate ignition coil for every cylinder. The one-piece coil bolts on to the cylinder head. Rubber boots seal the secondary terminal ends of the coils to the highest of all 8 spark plugs. A separate electrical connector is used for every coil.

Because of coil design, spark plug cables (secondary cables) should not used. A distributor is just not used with the 4.7L engine.

Two knock sensors (one for every cylinder financial institution) are used to assist management spark knock.

The Auto Shutdown (ASD) relay offers battery voltage to every ignition coil.

The ignition system consists of:

16 Spark Plugs (2 per cylinder)
8 Separate Ignition Coils
2 Knock Sensors
Powertrain Control Module (PCM)
Also to be thought of a part of the ignition system are sure inputs from the Crankshaft Position, Camshaft Position, Throttle Position, 2 knock and MAP Sensors.

 

5.7L V-8 HEMI ENGINE (2005 fashions)

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Spark plug/coil wire harness meeting. When the plugs fireplace after compression for the cylinder on the ability stroke, the companion cylinder on the other financial institution fires throughout the exhaust stroke, requiring solely eight ignition coils to fireside all 16 spark plugs.

The 5.7L V-8 engine is supplied with 16 spark plugs. Two plugs are used for every cylinder. The 5.7L can also be outfitted with 8 separate and impartial ignition coils. The one-piece coil bolts on to the cylinder head cowl and attaches the coils secondary output terminal on to a spark plug utilizing a rubber boot seal. Each coil can also be outfitted with a second output terminal. This second terminal connects a standard spark plug cable on to a spark plug on the other cylinder financial institution. A separate major electrical connector is used for every coil.

Eight typical spark plug cables are used with the 5.7L. These cables join a coil on one cylinder financial institution, on to a spark plug on the other cylinder financial institution. The cables are positioned and routed in a particular plastic loom to maintain them separated. This loom is clipped to the consumption manifold. To forestall a mismatch of cables, a corresponding spark plug / coil quantity is displayed on every plug cable: 1/6, 2/3, 4/7 and 5/8. These numbers and will also be discovered on the highest of the consumption manifold to the fitting of the throttle physique.

Two knock sensors (one for every cylinder financial institution) are used to assist management spark knock.

The 5.7L engine doesn’t use a standard distributor.

The ignition system consists of:

16 Spark Plugs (2 per cylinder)
8 Separate, Dual-Secondary Output, Ignition Coils
2 Knock Sensors
8 Secondary Ignition Cables
Powertrain Control Module (PCM)
Also to be thought of a part of the ignition system are sure inputs from the Crankshaft Position, Camshaft Position, Throttle Position, 2 knock and MAP Sensors.

 

5.7L V-8 HEMI ENGINE (2006-2010 fashions, plug cables eradicated)

The 5.7L V-8 engine is supplied with 16 spark plugs. Two plugs are used for every cylinder. The 5.7L can also be outfitted with 8 separate and impartial ignition coils. The one-piece coil bolts on to the cylinder head cowl and attaches the coils secondary output terminal on to a spark plug utilizing a rubber boot seal. A separate major electrical connector is used for every coil.

Two knock sensors (one for every cylinder financial institution) are used to assist management spark knock.

The 5.7L engine doesn’t use a standard distributor.

The ignition system consists of:

16 Spark Plugs (2 per cylinder)
8 Separate, Dual-Secondary Output, Ignition Coils
2 Knock Sensors
Powertrain Control Module (PCM)
Also to be thought of a part of the ignition system are sure inputs from the Crankshaft Position, Camshaft Position, Throttle Position, 2 knock and MAP Sensors.

 

Spark plug set up and removing

 

 

Removing plugs – 3.7L engine

Each particular person spark plug is situated below every ignition coil. Each particular person ignition coil should be eliminated to realize entry to every spark plug. The coil matches into machined holes within the cylinder head. A mounting stud/nut secures every coil to the highest of the consumption manifold. The backside of the coil is supplied with a rubber boot to seal the spark plug to the coil. Inside every rubber boot is a spring. The spring is used for a mechanical contact between the coil and the highest of the spark plug. These rubber boots and is derived are a everlasting a part of the coil and should not serviced individually. An o-ring is used to seal the coil on the opening into the cylinder head.

1. Remove essential air filter tubing at throttle physique.

2. Prior to eradicating ignition coil, spray compressed air round coil base at cylinder head.

3. Depending on which coil is being eliminated, the throttle physique air consumption tube or consumption field might have to be eliminated to realize entry to coil.

4. Disconnect electrical connector from coil by pushing downward on launch lock on high of connector and pull connector from coil.

5. Clean space at base of coil with compressed air earlier than removing.

6. Remove coil mounting nut from mounting stud.

7. Carefully pull up coil from cylinder head opening with a slight twisting motion.

8. Remove coil from automobile.

9. Prior to eradicating spark plug, spray compressed air into cylinder head opening. This will assist forestall overseas materials from getting into combustion chamber.

10. Remove spark plug from cylinder head utilizing a high quality socket with a rubber or foam insert. Also test situation of ignition coil o-ring and substitute as essential.

Installing plugs – 3.7L engine

Special care needs to be taken when putting in spark plugs into the cylinder head spark plug wells. Be certain the plugs don’t drop into the plug wells as electrodes could be broken.

Always tighten spark plugs to the desired torque. Over tightening could cause distortion leading to a change within the spark plug hole or a cracked porcelain insulator.

1. Check and regulate spark plug hole with a spot gauging instrument.

2. Start the spark plug into the cylinder head by hand to keep away from cross threading.

3. Tighten spark plugs to twenty Ft. lbs. torque.

4. Before putting in ignition coil(s), test situation of coil o-ring and substitute as essential. To support in coil set up, apply silicone to the coil o-ring.

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5. Position ignition coil into cylinder head opening and push onto spark plug. Do this whereas guiding coil base over mounting stud.

6. Install coil mounting stud nut.

7. Connect electrical connector to coil by snapping into place.

8. If essential, set up throttle physique air tube.

 

3.7L engine coil
 

 

 

Removing plugs – 4.7L engine (2005-2007)

Each particular person spark plug is situated below every ignition coil. Each particular person ignition coil should be eliminated to realize entry to every spark plug. The coil matches into machined holes within the cylinder head. A mounting stud/nut secures every coil to the highest of the consumption manifold. The backside of the coil is supplied with a rubber boot to seal the spark plug to the coil. Inside every rubber boot is a spring. The spring is used for a mechanical contact between the coil and the highest of the spark plug. These rubber boots and is derived are a everlasting a part of the coil and should not serviced individually. An o-ring is used to seal the coil on the opening into the cylinder head.

1. Remove essential air filter tubing at throttle physique.

2. Prior to eradicating ignition coil, spray compressed air round coil base at cylinder head.

3. Depending on which coil is being eliminated, the throttle physique air consumption tube or consumption field might have to be eliminated to realize entry to coil.

4. Disconnect electrical connector from coil by pushing downward on launch lock on high of connector and pull connector from coil.

5. Clean space at base of coil with compressed air earlier than removing.

6. Remove coil mounting nut from mounting stud.

7. Carefully pull up coil from cylinder head opening with a slight twisting motion.

8. Remove coil from automobile.

9. Prior to eradicating spark plug, spray compressed air into cylinder head opening. This will assist forestall overseas materials from getting into combustion chamber.

10. Remove spark plug from cylinder head utilizing a high quality socket with a rubber or foam insert. Also test situation of ignition coil o-ring and substitute as essential.

Installing plugs – 4.7L engine (2005-2007)

CAUTION: The 4.7L V–8 engine is supplied with copper core floor electrode spark plugs. They should be changed with the identical sort/quantity spark plug as the unique. If one other spark plug is substituted, preignition will consequence.

Special care needs to be taken when putting in spark plugs into the cylinder head spark plug wells. Be certain the plugs don’t drop into the plug wells as electrodes could be broken.

Always tighten spark plugs to the desired torque. Over tightening could cause distortion leading to a change within the spark plug hole or a cracked porcelain insulator.

1. Check and regulate spark plug hole with a spot gauging instrument.

2. Start the spark plug into the cylinder head by hand to keep away from cross threading.

3. Tighten spark plugs to twenty Ft. lbs. torque.

4. Before putting in ignition coil(s), test situation of coil o-ring and substitute as essential. To support in coil set up, apply silicone to coil o-ring.

5. Position ignition coil into cylinder head opening and push onto spark plug. Do this whereas guiding coil base over mounting stud.

6. Install coil mounting stud nut.

7. Connect electrical connector to coil by snapping into place.

8. If essential, set up throttle physique air tube.

 

4.7L engine coil (2005-2007)

 

Removing plugs – 4.7L engine (2008-2010)

CAUTION: This engine makes use of TWO DIFFERENT sorts of spark plugs. A complete of 16 plugs is used. The plugs are mounted in two rows (banks). The higher row is used on the consumption valve aspect of the cylinder head. The decrease row is used on the exhaust valve aspect of the cylinder head. The higher row makes use of Bosch Nickel Yttrium plugs. The decrease row makes use of Bosch Iridium plugs. DO NOT INTERCHANGE THESE PLUGS.

CAUTION: Do not try to wash any of the spark plugs. Replace solely.

1. Remove essential air filter tubing and air consumption elements at high of engine and at throttle physique.

2. To take away the higher row of plugs, every particular person ignition coil should first be eliminated. Prior to eradicating ignition coil, spray compressed air round coil base at cylinder head.

3. Prior to eradicating spark plug, spray compressed air into cylinder head opening. This will assist forestall overseas materials from getting into combustion chamber.

CAUTION: Due to tight clearances between UPPER row of plugs and cylinder head, a standard deep, thick-wall spark plug socket is not going to match. Use a deep, THIN-WALL 5/8” spark plug socket for plug removing and set up.

 

 

 

4.7L engine – coil (2008-2010)

Installing plugs – 4.7L engine (2008-2009)

CAUTION: This engine makes use of TWO DIFFERENT sorts of spark plugs. A complete of 16 plugs is used. The plugs are mounted in two rows (banks). The higher row is used on the consumption valve aspect of the cylinder head. The decrease row is used on the exhaust valve aspect of the cylinder head. The higher row makes use of Bosch Nickel Yttrium plugs. The decrease row makes use of Bosch Iridium plugs. DO NOT INTERCHANGE THESE PLUGS.

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CAUTION: Never use a motorized wire wheel brush to wash spark plugs. Metallic deposits will stay on spark plug insulator and can trigger plug misfire.

CAUTION: Do not try to wash any of the spark plugs. Replace solely.

1. Check and regulate spark plug hole with a spot gauging instrument. Two completely different gaps are used.

2. To support in coil set up, apply silicone based mostly grease comparable to Mopar® Dielectric Grease into spark plug finish of rubber boots. Also apply this grease to the tops of spark plugs.

3. Start the spark plug into the cylinder head by hand to keep away from cross threading. Special care needs to be taken when putting in spark plugs into the cylinder head spark plug wells. Be certain the plugs don’t drop into the plug wells as electrodes could be broken.

CAUTION: Due to tight clearances between higher row of plugs and cylinder head, a standard deep, thick-wall spark plug socket is not going to match. Use a deep, THIN-WALL 5/8” spark plug socket for plug removing and set up.

4. Install ignition coil(s).

5. Install essential air filter tubing and air consumption elements to high of engine and to throttle physique.

 

4.7L engine – coil location (2008-2010)
 

 

 

Removing plugs – 5.7L and 6.1L engines

 

 

5.7L be aware (2005 fashions solely):
Before eradicating or disconnecting any spark plug cables, be aware their unique place. Remove cables one-at-a-time. To forestall ignition crossfire, spark plug cables MUST be positioned in cable tray (routing loom) into their unique place. See diagram and data beneath.

Each particular person spark plug is situated below every ignition coil. Each particular person ignition coil should be eliminated to realize entry to every spark plug. The coil mounts to the highest of the valve cowl with two bolts. The backside of the coil is supplied with a rubber boot to seal the spark plug to the coil. Inside every rubber boot is a spring. The spring is used for a mechanical contact between the coil and the highest of the spark plug.

1. Remove, if essential, air filter tubing at throttle physique.

2. Unlock the coil electrical connector by shifting slide lock first. Press on launch lock whereas pulling electrical connector from coil.

3. Prior to eradicating ignition coil, spray compressed air round coil base at cylinder head.

4. Remove two mounting bolts (be aware that mounting bolts are retained to coil).

5. Carefully pull up coil from cylinder head opening with a slight twisting motion.

6. Remove coil from automobile.

7. Prior to eradicating spark plug, spray compressed air into cylinder head opening. This will assist forestall overseas materials from getting into combustion chamber.

8. Remove spark plug from cylinder head utilizing a high quality socket with a rubber or foam insert. Also test situation of ignition coil o-ring and substitute as essential.

Installing plugs – 5.7L and 6.1L engines

Special care needs to be taken when putting in spark plugs into the cylinder head spark plug wells. Be certain the plugs don’t drop into the plug wells as electrodes could be broken.

1. Check and regulate spark plug hole with a spot gauging instrument.

2. Start the spark plug into cylinder head by hand to keep away from cross threading the aluminum threads. To support in set up, connect a bit of rubber hose, or an previous spark plug boot to the spark plug.

3. The 5.7L and 6.1L engines are outfitted with torque important design spark plugs. Tighten spark plugs to 12-14 Ft. lbs. Do not exceed 15 ft. lbs. torque.

4. Install ignition coil(s) to essential spark plugs.

5. Before putting in spark plug cables to both the spark plugs or coils, or earlier than putting in a coil to a spark plug, apply dielectric grease to inside of shoes and the highest of the spark plug.

6. Position ignition coil into cylinder head opening and push onto spark plug. Twist coil into place.

7. Install 2 coil mounting bolts. Tighten to 62 in. lbs.

8. Connect electrical connector to coil by snapping into place.

 

 

5.7L engine – coil elements and removing
Plug wires – 2005 mannequin 5.7 engines

 

 

Spark plug cables on the 5.7L engine are paired on cylinders 1/6, 2/3, 4/7 and 5/8. Before eradicating or disconnecting any spark plug cables, be aware their unique place . Remove cables one-at-a-time. To forestall ignition crossfire, spark plug cables MUST be positioned in cable tray (routing loom) into their unique place. The cable retention clips (6) and (8) should even be securely locked. If cable tray removing is critical, launch the 4 tray-to-manifold retention clips.

 

1 – #8 COIL-TO- #5 SPARK PLUG (MARKED 5/8) 7 – CABLE TRAY
2 – #7 COIL-TO- #4 SPARK PLUG (MARKED 4/7) 8 – CLIPS (SPARK PLUG CABLE-TO-TRAY- RETENTION)
3 – #5 COIL-TO- #8 SPARK PLUG (MARKED 5/8) 9 – #2 COIL-TO- #3 SPARK PLUG (MARKED 2/3)
4 – #3 COIL-TO- #2 SPARK PLUG (MARKED 2/3) 10 – #4 COIL-TO- #7 SPARK PLUG (MARKED 4/7)
5 – #1 COIL-TO- #6 SPARK PLUG (MARKED 1/6) 11 – #6 COIL-TO- #1 SPARK PLUG (MARKED 1/6)
6 – CLIPS (TRAY-TO-MANIFOLD RETENTION)

 

 

 

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