Teledyne Continental Motors, Inc.
TM
Maintenance and Adjustments
IOF-550 Permold Series Engine Maintenance Manual
9-19
1 April 2007
9.
Sparingly apply Champion spark plug lubricant to all except the first row of threads
on the spark plug.
10.
Thread each spark plug by hand into the engine cylinder head within one to two
threads of the gasket. If the spark plug cannot be successfully tightened, clean the
cylinder or spark plug threads.
11.
Torque the spark plugs according to Appendix B using a currently calibrated torque
wrench and deep-well socket.
9-4.2. Ignition Harness Maintenance
The high voltage harness consists of two spark plug wire leads per cylinder for a total of
12 leads. This harness carries the high-voltage energy from the ECU spark towers to the
spark plugs on the engine. The high voltage harness is constructed of a lightweight
flexible silicone coated cable.
WARNING
Failure to maintain the spark plug and ignition leads may
result in high-voltage coil malfunction, engine damage or
failure.
CAUTION: Handle the spark plugs with clean, dry hands. Discard
any spark plug that has been dropped or damaged.
Procedure
1.
Loosen the B-nut on each of the spark plug ferrules from the spark plugs. Once the
nuts spin freely, stop loosening. Remove the cable ties securing the high voltage
harnesses. Loosen the B-nuts on each of the ECU spark towers.
2.
Remove and inspect the spark plug leads for chafing, heat damage, wear, and
cracking. Replace damaged cables in pairs as indicated below.
PAIR Cylinder
Locations
1
1 Top
2 Bottom
2 1
Bottom
2Top
3
3 Top
4 Bottom
4
3 Bottom 4 Top
5
5 Top
6 Bottom
6
5 Bottom 6 Top
3.
Route the ECU end of the ignition lead wires to the appropriate ECU. Each ignition
lead wire has a metal identification (ID) tag that designates the cylinder and spark
plug assignment. For example, 2T designates the lead is for Cylinder 2 top spark plug
and 2B is for Cylinder 2 bottom spark plug.
