Acura NSX 1991 Manual page 142

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Piston/Connecting Rod Assemblies
Installation
Before installing the piston, apply a coat of
engine oil to the ring grooves and cylinder
bores.
1. If the crankshaft is already installed:
• Guide the piston carefully to prevent damage.
• Fit long rubber hoses (about 30 cm (12 in) long) to
the connecting rod bolts to protect the crankshaft.
• Install the pistons after setting the crankshaft to
BDC for each cylinder.
CORRECT
RUBBER HOSES
Install the piston assemblies in No. 1 and No. 4
cylinders, No. 2 and No. 5 cylinders, and No. 3
and No. 6 cylinders.
Install the ring compressor, check that the bear-
ing is securely in place; then position the piston
in the cylinder and tap it in using the wooden
handle of a hammer.
Stop after the ring compressor pops free and
check the connecting rod-to-crank journal align-
ment before putting rod into place.
Install the rod caps with bearings, and torque the
nuts to 20 N-m (2.0 kg-m, 14 Ib-ft), then turn the
nut 95 degrees (see page 7-19).
Table of Contents
INCORRECT
If the crankshaft is not installed:
• Remove the rod caps and bearings, install the
ring compressor, then position the piston in the
cylinder and tap it in using the wooden handle of
a hammer.
NOTE: Maintain downward force on the ring com-
pressor to prevent rings from expanding before
entering the cylinder bore.
The arrow must face
the timing belt side
of the engine and the
connecting rod oil hole
must face the rear side
of the engine.
CONNECTING ROD
OIL HOLE
Use the wooden handle
of a hammer to push, or
tap the piston into the
cylinder bore.
RING COMPRESSOR