Chevrolet Impala SS Handbook page 26

Buy an older style Opti-spark (the one you're supposed to buy), and simply change the cap Of course,
you will need to do a few additional things.
Parts:
Tools:
Recommended:
Procedure:
1. Remove your cap from your new Opti-spark. Nothing like taking apart something brand new eh?
2. Remove the rotor from the Opti-spark. This should be a Torx T15. Carefully remove the rotor, and the
metal disc. Do NOT remove the slotted one Its spot welded on for a reason. Only the disc directly behind
the rotor should be removed.
3. Remove the middle spacer. This is the center portion of the Opti-spark body. Set aside everything, but the
back plate. Be careful when handling this. Try not to get any grease, dirt or anything on the disc.
4. You will notice 3 holes on the base. Fill the center one, and the one closest to the long pointed portion of
the base in with JB Weld or something similar. Drill out the remaining hole. Try not to get the metal
shavings in or on the Opti-spark.
5. Next, tap in a brass fitting. Do not use the center hole for this, as it won't clear the balancer hub. If you
can find a brass L fitting, this would be your best bet.
6. Vacuum the metal shavings from the previous step. Make sure it's clean before you put it back together.
7. Reassembly is the same. Make sure you don't forget to put the metal disc back in place. If you leave it out,
the gap for the rotor and cap will be way off. The rotor and disc are keyed, but still be sure you put them
in correctly.
›
Remove the old RTV Sealant, and put some new RTV on the cap at the electrical connection. Put it back
together with the newer style cap. Lightly blow into one of the hose connections while closing off the
other. You should hear no hissing. Also don't allow the shaft to spin on the Opti-Spark.
26
Maintenance: Electrical
SSHandbook