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Page 158
REPAIR INSTRUCTIONS
PISTON COOLING NOZZLE SPRAY
POSITIONING
Refer to Figure 150.
The piston cooling oil spray target location on the
underside of the piston is important. It ensures
adequate dissipation of heat from the piston.
Correct positioning of the nozzles also ensures
that the crankshaft counterweights do not strike
the nozzles.
For ease of installation and to reduce the amount
of crankshaft rotation needed to facilitate access
to the spray nozzles, install the spray nozzles in
the following set order: cylinders 1 and 6, 5 and 2,
3 and 4.
150
Figure 150 — Spray Nozzle Patterns
Using piston cooling nozzle spray position set
J 39045 (1991 and later), check the direction of
the spray from the nozzles. Refer to Figure 151.
1. Position rod (6) in the end of the spray
nozzle (7).
2. Place the applicable plastic target (1) on the
cylinder block (2) over the cylinder to be
tested.
3. Install a cylinder head bolt through the target
alignment hole (3) and into the cylinder block
capscrew hole (4) to align the target.
1. Old Pattern (E7 Engine with Aluminum Pistons,
Prior to 1991)
2. New Pattern (E-Tech™ and E7 Engines with Two-Piece
Pistons, 1991 and Later)
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