Where the hell did they put the spark plugs? I've looked all over the engine, and I don't see the damn plugs. Did they hide them under a bunch of crap? I'm going to change them here in the near future to some Iridiums. Has anyone else changed their plugs or found the ones on the engine?

 

Just follow the wires. I believe that each plug has its own coil on top of it (that's why you can't see the plugs themselves). Those have to be removed first to gain access to the plugs. I haven't done this yet, so I can't get too detailed.

 

(Copied from the manual avail on-line above)

(To remove the coil

4.7L V-8

An individual ignition coil (1) is used for each spark

plug. The coil fits into machined holes in the cylinder

head. A mounting stud/nut (3) secures each coil to the

top of the intake manifold . The bottom of the coil is

equipped with a rubber boot to seal the spark plug to

the coil. Inside each rubber boot is a spring. The

spring is used for a mechanical contact between the

coil and the top of the spark plug. These rubber boots

and springs are a permanent part of the coil and are

not serviced separately. An o-ring is used to seal the

coil at the opening into the cylinder head.

1. Depending on which coil is being removed, the

throttle body air intake tube or intake box may

need to be removed to gain access to coil.

2. Disconnect electrical connector (2) from coil by

pushing downward on release lock on top of connector

and pull connector from coil.

3. Clean area at base of coil with compressed air

before removal.

4. Remove coil mounting nut (3) from mounting stud.

5. Carefully pull up coil from cylinder head opening

with a slight twisting action.

6. Remove coil from vehicle.

(Removing spark plug):

4.7L V-8

Each individual spark plug is located under each ignition coil. Each individual ignition coil must be removed to gain

access to each spark plug. Refer to Ignition Coil Removal/Installation.

1. Remove necessary air filter tubing at throttle body.

2. Prior to removing ignition coil, spray compressed air around coil base at cylinder head.

3. Prior to removing spark plug, spray compressed air into cylinder head opening. This will help prevent foreign

material from entering combustion chamber.

4. Remove spark plug from cylinder head using a quality socket with a rubber or foam insert. Also check condition

of ignition coil o-ring and replace as necessary.

5. Inspect spark plug condition.

(To Replace spark plug):

4.7L V-8

CAUTION: The 4.7L V–8 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, preignition

will result.

Special care should be taken when installing spark plugs into the cylinder head spark plug wells. Be sure the plugs

do not drop into the plug wells as electrodes can be damaged.

Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the

spark plug gap or a cracked porcelain insulator.

1. Start the spark plug into the cylinder head by hand to avoid cross threading.

2. Tighten spark plugs. Refer to torque specifications.

3. Before installing ignition 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.

(To install coil

4.7L V-8

1. Using compressed air, blow out any dirt or contaminants

from around top of spark plug.

2. Check condition of coil o-ring and replace as necessary.

To aid in coil installation, apply silicone to

coil o-ring.

3. Position ignition coil into cylinder head opening and

push onto spark plug. Do this while guiding coil

base over mounting stud.

4. Install coil mounting stud nut (3). Refer to torque

specifications.

5. Connect electrical connector (2) to coil by snapping

into position.

6. If necessary, install throttle body air tube.

 

Thanks for the info. Where'd you find the manual? I think I'm going to have to buy it.

 

Just, download it from the top of the 3rd Gen section.

It says Service Manual right up there.

 

Thanks, I don't think that I've ever noticed it before. Now I feel cool.

 

wrong thread lol

 

stay away from the iridiums and the platinum plugs for our trucks, they dont work. i switched out my plugs at 30000 and went to the autolite platnums and lost 45/50 miles to a tank of gas. switched back to the stock champions and my mileage went back up. the e3 plugs are crap also. my other site www.dodgetruckworld.com has members complaining that the probes are breaking off. some other people with the 4.7 say the autolite 3922 are cooler and work well in our trucks. but stick with the champions.

 

I know about the Platinums. I've wanted to put them in, but was strongly recommended not to since the cores of our trucks won't work properly with them. The Iridiums are suppose to be a lot better since the core of the plugs aren't made from platinum. I'll do more research before I put them in.

Thanks for the heads up.