Installation - Mercury MerCruiser D2.8L D-Tronic Service Manual

ENGINE MECHANICAL
8. Using Piston Ring Expander 91-24697, install the second compression ring in the center
piston groove. Scraper side of ring must face bottom of piston.
IMPORTANT: On all engines the word - TOP - appears on the upper surface of the first
compression ring, and MUST FACE UP.
9. Using piston ring expander, install first compression ring in upper piston groove.

Installation

1. Before installing pistons into cylinders, ring gaps must be positioned as follows:
a. First compression ring (trapezoidal) gap, 30 degrees to the right of combustion
b. Second compression ring gap, directly opposite the combustion chamber recess.
c. Lower (oil control) ring gap, 30 degrees to the left of combustion chamber recess.
Typical
2. Lubricate cylinder bore and piston rings with SAE 30W engine oil.
3. Each piston and connecting rod assembly must be installed in the cylinder from which
it was removed.
Page 3A-114
a - Scraper Side Toward Bottom Of Piston
chamber recess.
a - First Ring Gap
b - Second Ring Gap
c - Lower (Oil Control) Ring Gap
a
b
c
SERVICE MANUAL NUMBER 22
a
90-860074--1 FEBRUARY 2002
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