Service Procedure

1. Open the hood.

2. Using shop air and a blow gun, clean any debris from the base of the spark plugs and cylinder head.

3. Remove the three even numbered engine cylinder spark plug cables by grasping the spark plug cable boot, rotating the boot 1/2 turn, and pulling straight back in a steady motion.

NOTE:
Even numbered engine cylinders are located on the left bank on (JK) Wrangler models and on the front bank on (RT) minivan models.

CAUTION:
Note the spark plug wire location and routing to ensure they are installed in their original positions after the spark plugs are inspected and/or replaced.

4. Using a quality spark plug socket with a rubber insert (Snap-on S9706KFUA or equivalent), carefully remove the spark plugs from the even numbered engine cylinders.

5. Inspect the spark plug part numbers:





> Spark plugs with the number "RE16MC" must be replaced (Figure 1).

NOTE:
These spark plugs will have one row of text on them. "CHAMPION
RE16MC" is printed on a single row (Figure 1).

> Spark plugs with the number "RE14PLP5" do not require replacement (Figure 1). These spark plugs are the correct plugs and must be reinstalled.

NOTE:
These spark plugs will have two rows of text on them. "CHAMPION"
is printed on the upper row and "RE14PLP5" on the second row (Figure 1).

6. Check and adjust the spark plug gap to 0.050 in (1.27 mm).

7. Apply a small amount of antiseize to the threads of each spark plug.

CAUTION:
Do not over apply anti-seize compound. Only use enough to lightly coat threads on the spark plug.

8. Using a quality spark plug socket with a rubber insert (Snap-on S9706KFUA or equivalent), start each spark plug into the cylinder head by hand.

9. Tighten the spark plugs to 13 ft. lbs. (17 N.m).

10. Install each of the spark plug wires over the spark plugs.

NOTE:
Each spark plug wire has the corresponding cylinder number
printed on it.

NOTE:
An audible click can be heard and felt when the spark plug cable
has been properly attached to the spark plug.

CAUTION:
Be sure that each spark plug wire location and routing is returned to its original position.





11. Type or print (with a ballpoint pen) the necessary information shown in Figure 2 onto the Authorized Modifications Label. Then attach the label near the VECI label.

12. For California vehicles, this recall is subject to the State of California Registration Renewal/Emissions Recall Enforcement Program. Complete a Vehicle Emission Recall Proof of Correction Form (Form No. 81-016-1053) and supply it to vehicle owners residing in the state of California for proof that this recall has been performed when they renew the vehicle registration.