Technical data

13773-001
78-10
Page 2 30 Nov 2000
(f) Remove EGT probe from #4 cylinder header. (Refer to 77-20)
(g) Remove brass nuts attaching exhaust headers to engine cylinders.
Note: Individual headers can be removed from the Y-pipe weldment at the slip joint.
(h) Remove exhaust headers from airplane.
(i) Remove old gaskets from cylinders.
(2) Installation - Exhaust Header Assembly
(a) Acquire necessary tools, equipment, and supplies.
(b) Slip exhaust header gaskets over cylinder port studs.
(c) Position headers to cylinder head studs. Install nuts to finger tight.
(d) Assemble RH headers to Y-pipe weldment.
(e) Assemble LH headers to Y-pipe weldment and install bolt, spring, and nut. Tighten nut to
snug, then two complete revolutions to compress spring. Install cotter-pin. Slight adjust-
ment of nut for cotter pin installation is allowable.
(f) Final torque header nuts to 100-110 inch-pounds (11-12 N.m.)
(g) Position mid-pipe to Y-pipe weldment and install bolt, spring, and nut. Tighten nut to snug,
then two complete revolutions to compress spring. Install cotter-pin. Slight adjustment of
nut for cotter pin installation is allowable.
(h) Install muffler to mid-pipe. (Refer to 78-20)
(i) Install tailpipe. (Refer to 78-10)
(j) Install engine cowling. (Refer to 71-10)
Description P/N or Spec. Supplier Purpose
Exhaust Header Gasket 649427 TCM Seal