Page 13-12
13
G
BREATHER VALVE (REED VALVE)
General Information
The function of the breather is to create a vacuum in the crankcase, which prevents oil from being forced out
of the engine through the piston rings, oil seals or gaskets.
The breather has a reed valve, which limits the direction of air flow caused by the piston moving up and
down.
Air can flow out of the crankcase, but the one way reed valve blocks return flow. It thus maintains a vacuum
in the crankcase.
Oil laden air in the crankcase passes through the reed valve and expands into the rocker chamber. In the
rocker chamber most oil separates from the air and drains back to the crankcase. The air passes through a
tube and vents to the intake manifold.
Breather Valve (Reed Valve) Removal
1. Unscrew the mounting screw (1) and remove the back plate (2) and reed valve (3) (Figure 13-15). (See
Page 13-21 for Installation.)
CLEANING AND INSPECTION OF CYLINDER HEAD
1. Clean the head with a non-flammable solvent and dry thoroughly.
2. Bead blast or scrape carbon deposits from head. When scraping carbon deposits, be careful to avoid
scratching or nicking the cylinder head.
3. Inspect the spark plug port threads for damage. If threads are damaged, replace the head.
4. Place the cylinder head on a surface plate (Figure 13-17).
• WHEN MAKING TESTS OR REPAIRS, ALWAYS:
- WEAR SAFETY GLASSES OR APPROVED EYE PROTECTION.
- REMOVE KEY.
- DO NOT ATTEMPT TO SERVICE HOT ENGINE OR EXHAUST.
- DISCONNECT BATTERY AS SHOWN (FIGURE 12-1, PAGE 12-2).
- REMOVE SPARK PLUG WIRE.
• BEFORE REMOVAL AND DISASSEMBLY, CLEAN THE ENGINE.
• SEE SAFETY WARNINGS, PAGE 13-1.
FIGURE 13-15
FIGURE 13-16
WARNING
1
3
2
1
Summary of Contents for 1996 DS Golf Car Gasoline
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