ICON A5 - Page 676

16-52 PROPULSION / ENGINE
ICON A5 / MAINTENANCE MANUAL CHANGE C2
CHAPTER 16
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
None
Parts Required
ICA013354 (CLAMP, WORM DRIVE, NORMA TORRO, .35X1.19-1.75, SPRING INSERT
Aircraft System and Number
13—Propulsion
Consumables
LOCTITE
®
243 (THREADLOCKER, PRIMERLESS, OIL TOL, REMOVABLE MED STR, BLUE)
ICA012067 (LUBRICANT, ANTI-SEIZE, NICKEL GRADE)
ICA012078 (LUBRICANT, GENERAL PURPOSE) Tef-Gel
®
TASK INSTRUCTIONS:
1. Remove all dust plugs from the four exhaust ports on the engine (if installed).
2. Apply LUBRICANT, ANTI-SEIZE around the perimeter and up to 2 inches from the end of the
FWD header.
3. Install FWD header onto the engine exhaust port studs using two new M8 copper lock nuts,
leaving nuts slightly loose to allow for later adjustment.
NOTE: The M8 lock nuts are for single use.
4. Disconnect the engine wire harness from the FWD intake manifolds by removing the M6 screw
and washer. Save for later step.
5. Attach support bracket to header using the noted clamp and hardware.
6. Attach other end of support bracket and engine wire harness to intake manifold using M6 screw
and washer (previously removed). Apply THREADLOCKER. Position wire harness clamp with flat
side down on top of exhaust bracket as shown in Figure 16-32.
NOTE: The left and right bracket tubes are different.
7. Tighten the M8 copper nuts attaching FWD header to engine incrementally until header is fully
seated. Torque both header nuts to 133 in-lb.
8. Torque the 1/4-28 nut at the support bracket clamp at headers to 30-40 in-lb. (See “Exhaust
Support Bracket (LH Shown).” on page 16-51.)
9. Torque the M6 screw to 90 in-lb.
10. Install header heat shield onto FWD header using 2x CLAMP. Align cutout in heat shield with EGT
sensor boss on FWD header. Orient CLAMP such that the spring insert rests on both heat shield
supports.
11. Torque 2x CLAMP incrementally up to 27-31 in-lb to prevent deflection of heat shield.