5-101.bk Page 15 Friday, March 17, 2006 11:05 AM
200 ENGINE ASSEMBLY Piston Cooling Nozzle Spray Positioning Refer to Figure 6-16. The piston cooling oil spray location on the underside of the piston is important; it ensures adequate heat dissipation from the piston and makes certain that the crankshaft counterweights of the connecting rods do not strike the nozzles.
Always replace a badly deformed spray nozzle. Do not attempt to realign it. Precise targeting is necessary to adequately cool the piston crown.
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 order: cylinders 1 and 6, 5 and 2, 3 and 4.
1
2
200277a
Figure 6-16 — Spray Nozzle Patterns 1. Old pattern (pre-1991)
2. New pattern (1991 and later)
Page 6-15
