S-74
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM
DIESEL ENGINE
Cylinder Head Surface Flatness
1. Clean the cylinder head surface.
2. Place a straightedge on the cylinder head’s four sides (A), (B),
(C) and (D) and two diagonal (E) and (F) as shown in the figure.
3. Measure the clearance with a feeler gauge.
4. If the measurement exceeds the allowable limit, correct it with a
surface grinder.
IMPORTANTQ
• Do not place the straightedge on the combustion chamber.
• Be sure to check the valve recessing after correcting.
W1027737
Cylinder Head Flaw
1. Prepare an air spray red check.
2. Clean the surface of the cylinder head with the detergent (2).
3. Spray the cylinder head surface with the red permeative liquid
(1). Leave it five to ten minutes after spraying.
4. Wash away the red permeative liquid on the cylinder head
surface with the detergent (2).
5. Spray the cylinder head surface with the white developer (3).
6. If flawed, it can be identified as red marks.
W1076542
Cylinder head surface
flatness
Allowable limit
0.05 mm
0.002 in.
(1) Red Permeative Liquid
(2) Detergent
(3) White Developer
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