> -----Original Message-----
> From: TerribleTom
>
> My girlfriend dumped her 04 Impala for a 04 Jeep Grand Cherokee
> Overland... a very plush Jeep I might add... I'm slightly envious
> actually - but don't tell her heh.
Congrats to the GF for a fine choice of vehicle! I love my '00 GC.
> She wants me to throw new plugs in it, its running fine with 98,000+
> miles on the engine, but theres no telling when or if the plugs were
> ever changed. My knowledge rests with the older engines... 3.9s, 318s,
> 360s etc... I've hardly touched a 4.7L before. I was trying to
> determine what has to be removed to get the plugs pulled. From a quick
> glance, it seems the upper plenum can be removed pretty easy... two
> bolts, the air duct connection, and the throttle body connection. Then
> it seems a simple matter of pulling the coil packs. This sound about
> right?
>
> I was initially worried about having to pull the upper plenum and
> possibly needing a gasket... but this doesn't seem to be the case.
>
> I'm planning on throwing autolite 3922s in there - the stock heat range
> copper plug.
>
> -- TerribleTom
Her 4.7 GC should be very similar to mine although the routing of some
things may be slightly different. (If I'd known last night about your
question I could have looked under the hood of my bro-in-law's '04 but it'll
be another week before I see him again) Anyway, the only thing you should
have to remove is the air box (or K&N FIPK in my case). On mine, there are
hard lines running right above the back plug on the passenger side so that
one plug takes me as long to change as the other 7 together. Due to it's
proximity to the cowl I've found it pays to have a really good collection of
socket extensions and a swivel. Plan on a couple hours the first time.
You will also want some petroleum jelly handy to lube the o-rings and some
anti-seize for the plug threads. I change mine around every 30,000 miles
or so and highly recommend the OEM plug or equivalent in the stock heat
range. Let me know if you need torque specs.
BTW Tom, I can highly recommend Eibach springs and sway bars for the GC.
You won't believe how good the ride and handling becomes.
Ray
'00 Grand Cherokee, 4.7, 4x4. Quarter mile best is 15.28 @ 87 mph. Fuel
mileage is 24+ mpg on long highway trips....unless it's hilly. And...it
trailered my Dak to California and back! What's not to love about GC's? :)
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
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