Section 05
ENGINE (4-TEC)
Subsection 02
(LEAK TEST)
05-02-2
SMR2002_066_05_02A.FM
– Remove valve cover cowl.
– Unscrew and remove valve cover.
1. Valve cover
2. Valve cover screw
PROCEDURE
The following procedure has to be performed for
each cylinder separately, because of the 120° off-
set between the TDCs.
Rotate crankshaft until all valves are closed by using
PTO flywheel remover/installer (P/N 529 035 820).
Therefore you have to monitor the rocker arms.
1. Intake rocker arms
Rotate the crankshaft
counterclockwise
until the
intake rocker arm has performed a full stroke.
Then rotate crankshaft for another half turn to be
sure that the valves are closed.
Hold the crankshaft in this position by using the im-
peller remover/installer tool (P/N 529 035 820) and
a wrench.
Install gauge adapter into previously cleaned spark
plug hole.
Connect to adequate air supply.
NOTE:
Each tester will have specific instruction
on the gauge operation and required pressure.
Set needle of measuring gauge to zero.
Supply combustion chamber with air.
1. Measuring gauge
2. Adequate adapter for spark plug hole
3. Air supply
Note the amount of leaking or percentage (de-
pending on tester).
2
R1503motr155A
1
1
R1503motr156A
LEAKAGE
PERCENTAGE
ENGINE
CONDITION
0% to 7%
Excellent condition
8% to 15%
Fair condition; proceed
with tuned up or adjust-
ment
16% to 30%
Poor condition; engine will
r u n a n d p e r fo r m a n c e
might be down in some
cases.
30% and higher
Very poor condition, diag-
nose and repair engine.
1
R1503motr157A
2
3
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Содержание GTX 4-TEC 5573 2002
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