Voyager L4-153 2.5L SOHC (1990)
Piston: Description and Operation
The pistons have valve cuts to provide valve clearance and also have cast-in steel struts at the pin bosses for autothermic control. The 2.5L TBI engine is
designed for 8.9:1 compression ratio while the 2.5 turbo engine is designed for 8.1:1 (nominal) compression ratio. The standard 2.5L piston is dished and
is a lightweight design to further enhance engine smoothness. All TBI 2.5L engines use pressed-in piston pins to attach forged steel connecting rods
while all 2.5 turbo engines use full floating piston pin and connecting rod assemblies.
