Exhaust Systems

Question 1

Exhaust gases are ducted outside of engine.

Main drawback was that in a sideslip, cold air would be forced back into stack. This could lead to the exhaust valves to crack when exposed to this cold air.

Answer 1

short stack

Question 2

_______ is typical exhaust system on a horizontally
opposed engine consists of RISERS from each cylinder and an exhaust collector on each side of the engine.

BALL JOINTS are installed for expansion movements and misalignments.

Answer 2

Opposed type exhaust manifold

Question 3

_______ exhaust manifold made up of pieces of tubing that are fitted together with
loose SLIP JOINTS.

Slip joints accommodate exhaust tube expansion when an engine is running to prevent leakage.

Answer 3

Radial Engine Collector Ring

Question 4

Exhaust system component found to reduce exhaust noise and reduce back-pressure.

Answer 4

Tapered or bevel tail pipe

Question 5

____ provides a series of internal baffles that help to break up the sound energy.

Answer 5

Mufflers

Question 6

______ ______ shroud around the muffler or pipe that will use the heat of the outer muffler skin to heat air which can then be used for Carburetor or Cabin heat.

Answer 6

Heat Exchangers/heat muff

Question 7

______ used to INCREASE cooling air flow through the engine compartment. Some also include a flow control valve and heat exchanger.

Answer 7

Augmenter Tubes

Question 8

Crush or Perma-seal type that will fill in any imperfections in the surfaces of the cylinder or riser flanges.

Crush type are always throw-away.

Answer 8

Exhaust gaskets

Question 9

Exhaust System maintenance:

Answer 9

Use of galvanized or zinc coated tools and lead pencils on stainless steel exhaust will result in premature failure due to their reaction with the metal.

Coated and treated exhaust components should not be sand blasted as this will remove protective coatings.

Always follow MANUFACTURER’s instructions