Mercury MerCruiser D2.8L D-Tronic Service Manual page 254

ENGINE MECHANICAL
DETERMINING HEAD GASKET THICKNESS
1. Use dial indicator 91-58222A1 and liner gauge bar 91-801333509 to measure piston height
above the cylinder block with piston at Top Dead Center.
2. Place liner gauge bar with dial indicator attached, across liner as shown (parallel to
cylinder centerline).
3. Set dial indicator to zero at point shown on cylinder block.
4. Move dial indicator to point shown on piston. Record measurement.
5. Measure all piston heights and use largest reading to determine which gaskets to use
for all cylinders.
6. Refer to Engine Specifications - Head Gaskets, to determine correct head gasket
thickness.
Page 3A-54
a - Liner Gauge Bar
b - Dial Indicator
c - Liner
a - Dial Indicator Zero Point
a - Measurement Point
b
a
c
a
SERVICE MANUAL NUMBER 22
70277
a
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90-860074--1 FEBRUARY 2002
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