ENGINE DISASSEMBLY
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3.2. Inspection and Measurement
3.2.1. Cylinder block
1) Clean the cylinder block thoroughly and make a visual inspection for cracks or damage.
2) Replace if cracked or severely damaged, and correct if slightly damaged.
3) Check oil and water flow lines for restriction or corrosion.
4) Make a hydraulic test to check for any cracks or air leaks.
Hydraulic test
Stop up each outlet port of water/oil passages in the cylinder block, apply air pressure of about 4kg/cm2 against
the inlet ports, then immerse the cylinder block in water for about 1 minute to check any leaks. (Water
temperature: 70 °C)
3.2.2. Cylinder head
1) Inspection
z
Carefully remove carbon from the lower lace of the cylinder head using nonmetallic material to prevent
scratching of the valve seat faces.
z
Check the entire cylinder head for very fine cracks or damage invisible to ordinary sight using a
hydraulic tester or a magnetic flaw detector.
2) Distortion at the lower face
z
Measure the amount of distortion using a
straight edge and a feeler gauge at six
positions (A ~ F) as shown in the right
figure.
z
If the measured value exceeds the standard
value, retrace the head with grinding paper
of fine grain size to correct such defect.
z
If the measured value exceeds the
maximum allowable limit, replace the
cylinder head.
Lower face warpage and height
(t)
A
B
C
D
E
EA3M2031
F
Standard Limit
Warpage 0.2 mm or less 0.3 mm
Thickness : t
(reference)
114.95 ~ 115.0 mm
113.9 mm
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