Section 04
ENGINE
Subsection 02
(LEAK TEST)
SMR2002-021_04_02A.FM
04-02-5
947 ENGINE
1. Exhaust plate
2. Rave valve plates
3. Intake plates
Activate pump and pressurize engine to 34 kPa
(5 PSI).
CAUTION:
Do not exceed this pressure.
Wait 3 minutes and check if pressure drops; if so,
verify all testing components.
If kit components are not leaking, verify engine
jointed surfaces as per following areas:
– spark plugs
– direct injector sealing (
DI engines
)
– cylinder head gasket
– cylinder base gasket
– crankcase halves
– rotary valve cover (
except all 947 engines
)
– engine plugs
– exhaust manifold
– intake manifold (
717 engine
)
– intake flanges (
DI engine
)
– oil injection pump (
717 engine
).
Check also small oil injection pump lines and fit-
tings; check for air bubbles or oil column going to-
ward pump, which indicate a defective check valve.
Check for leak through counterbalancing shaft
seal toward air compressor (
DI engines
). Air bub-
bles in lowest fitting (oil return line) underneath
compressor indicates a seal leakage.
If the above mentioned components are not leak-
ing, block both oil hoses of the rotary valve shaft
(
if so equipped
) using hose pinchers.
NOTE:
If leakage stops at this point, proceed with
Rotary Valve Shaft
testing (
if so equipped
).
If there is still some leakage, remove the PTO fly-
wheel to verify outer seal.
If no leak is found on the PTO side outer seal, re-
move magneto flywheel and verify crankshaft out-
er seals.
Proceed with the
Rotary Valve Shaft
testing (
if
so equipped
) if the crankshaft outer seals are not
leaking.
Rotary Valve Shaft (if so equipped)
NOTE:
It is mandatory to drain the injection oil
from the rotary valve shaft.
Block oil return hose of the rotary valve shaft with
a hose pincher.
717 ENGINE
1. Oil return hose blocked with hose pincher
3
1
2
F08D05A
F01B31A
1
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Summary of Contents for GTI 5558
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