Technical data

13773-001
78-10
Page 1
COLLECTOR
1. DESCRIPTION
This section describes the portion of the exhaust system which collects the exhaust gases from the cylin-
der and conducts them overboard. Included are the exhaust gas temperature probe, the exhaust header
assembly, and the tailpipe.
Each of the six headers are connected to the engine by brass nuts on the engines exhaust studs. Gaskets
seal the header to each cylinder. The three headers on each side of the engine are connected to a Y-pipe
weldment through a slip joint and a spring loaded bolt to allow for contraction and expansion as well as
engine movement. This Y-pipe combines the 3 header pipes on each side of the engine into 1 pipe (per
side) which is then combined into a single pipe carrying all six cylinder's exhaust gases forward. A slip joint
connects the Y-pipe to the mid-pipe which takes the exhaust gas across to the right side of the engine and
then aft to the muffler/heat exchanger. Ball joints and slip joints are employed to allow movement due to
heat expansion and normal operating loads.
2. MAINTENANCE PRACTICES
A. Tail Pipe
(1) Removal - Tail Pipe
(a) Remove engine cowling. (Refer to 71-10)
(b) Remove screws and washers at tailpipe securing tail pipe support to firewall.
(c) Remove bolts, washers, springs, and nuts from ball joint securing tail pipe to muffler.
(d) Remove tail pipe from airplane.
(2) Installation - Tail Pipe
(a) Acquire necessary tools, equipment, and supplies.
(b) Polish both sides of ball joint with emery cloth to ensure surface is smooth and free of
burrs and apply a thin coat of antiseize lubricant to polished ball joint surfaces.
(c) Position tail pipe on muffler port and install ball joint bolts, washers, springs, and nut to
secure pipe to muffler
(d) Adjust aft ball joint nuts as required to ensure the overall length of each compression
spring is 0.50 inch (1.27 cm).
(e) Install screws and washers securing tail pipe to firewall.
(f) Install engine cowling. (Refer to 71-10)
B. Exhaust Headers
(1) Removal - Exhaust Headers
(a) Remove engine cowling. (Refer to 71-10)
(b) Remove tailpipe (Refer to 78-10), and muffler. (Refer to 78-20)
(c) Remove cotter pin, bolt, spring, and nut securing mid-pipe to Y-pipe weldment and remove
mid-pipe.
(d) Remove cotter pin, bolt, spring, and nut securing LH headers to Y-pipe weldment.
(e) Remove CHT probe from #6 cylinder header. (Refer to 77-20)
Description P/N or Spec. Supplier Purpose
Permatex K133 - Any Source Antiseize Lubri-
cant.
Emery Cloth - Any Source Polishing.
30 Nov 2000