spark plugs 99 gc
is there a write up with pictures somewhere???? always used to vehicles with spark plug wires, not used to this newfangled crap
Coil packed plugs are even easier to change (no wires to deal with). Cheaper as well, as most of the time the coil packs last forever (knock on wood) and you don't have to replace wires as part of a tuneup.
Originally Posted by cmonson View Post
regardless, if you are swapping out plugs/packs, be very careful pulling the coil packs out. when i replaced mine at 115k (and im not sure if they had ever been done before that), they were seized in the cavities pretty badly. i ended up accidentally cracking the bottom part that surrounds the spark plug on several of them. this process was even more tedious on the rear passenger side.
-2005 WK 5.7 Limited [DD]
-1999 WJ 4.7 Limited [SOLD]
-1998 ZJ 5.9 Limited [SOLD]
-1996 ZJ 5.2 Laredo [SOLD]
-1994 ZJ 4.0 Laredo [SOLD]
-1993 XJ 2.5 [SOLD]
To change the 4.7 plugs,remove the air intake at the throttle body,remove the 10mm bolt holding the oil dipstick tube and bend it slightly out of the way,using a screw driver lightly push down on the locking tab on all the coil pack connectors and pull them off,remove the 10mm bolts on each coil pack and pull up on the coil to remove it,ive found the easiest way to remove the plugs is with a 5/8 swivel plug sock and and extension,the rear on the pass side is a little tircky,but everything usually comes apart without problem.
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