5_108.bk Page 138 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS 3. Install a cylinder head bolt through the target alignment hole (3) and into the cylinder block capscrew hole (4) to align the target.
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4. The rod (6) should now be aligned in the target area (5). If the rod is at the edge of the target area, center the rod in the target area as follows: a.
Loosen the nozzle setscrew. A slight adjustment can then be made to center the rod within the target area.
b.
Following adjustment, tighten the setscrew to the specified torque, 15 lb-ft (20 N•m).
Always replace a badly deformed spray nozzle. Do not attempt to realign it. Precise targeting is necessary to adequately cool the piston crown. 175
Figure 174 — Spray Nozzle Installation 1. Threaded Hole 2. Oil Passage 3. Spray Nozzle Bracket 4. Retaining Screw
5. Cylinder Block 6. Locator Tube 7. Elastomer Sleeve
PISTON COOLING NOZZLE SPRAY POSITIONING 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. Using piston cooling nozzle spray position set J 39045, check the direction of the spray from the nozzles. Refer to Figure 175. 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.
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Figure 175 — Spray Nozzle Targeting 1. Plastic Target 2. Cylinder Block 3. Alignment Hole 4. Cylinder Block Hole
5. Target Area 6. Rod 7. Spray Nozzle
