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Section 04
ENGINE (DI)
Subsection 05
(TOP END)
SMR2002-062_04_05A.FM
04-05-15
Combustion Chamber Volume
Measurement
NOTE:
This procedure is required to determine
the thickness of the cylinder base gasket to be in-
stalled if a crank repair has involved replacement
of connecting rods or if you are experiencing re-
petitive engine seizure.
The combustion chamber volume is the region in
the cylinder head above the piston at Top Dead
Center. It is measured with the cylinder head in-
stalled on the engine.
1. Combustion chamber
NOTE:
When checking the combustion chamber
volume, engine must be cold, piston must be free
of carbon deposit and cylinder head must be lev-
eled.
1. Remove both direct injectors and bring one pis-
ton to Top Dead Center using a TDC gauge.
Keep spark plugs in their holes.
2. Obtain a graduated burette (capacity 0 - 50 cc)
and fill with an equal part (50/50) of gasoline and
injection oil.
1. Graduated burette (0 - 50 cc)
3. Open burette valve to fill its tip. Add liquid in
burette until level reaches 0 cc.
4. Inject the burette content through direct injec-
tor hole
until liquid touches the top hole.
1. Top of spark plug hole
NOTE:
The liquid level in cylinder must not drop
for a few seconds after filling. If so, there is a leak
between piston and cylinder. The recorded vol-
ume would be false.
5. Let burette stand upward for about 10 minutes,
until liquid level is stabilized.
6. Read the burette scale to obtain the quantity of
liquid injected in the combustion chamber.
Compare the obtained value with the table below.
The volume should be within the allowable range.
If the volume of the combustion chamber is not
within specifications, change cylinder base gasket
thickness as follow.
A higher volume dictates a thinner gasket.
A lower volume dictates a thicker gasket.
7. Repeat the procedure for the other cylinder(s).
F01D5VA
1
F00B0BA
1
ENGINE
COMBUSTION CHAMBER
VOLUME
947 DI
45.7 - 48.4 cc
F00D0HA
1
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Summary of Contents for GTX 4-TEC 5573 2002
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