1.5L REVOTORQ ENGINE 79 F. Piston Cooling Nozzle Piston cooling nozzles are fitted on the block such that the oil sprayed from it hits the underside of the piston crown / gallery. This is very essential to bring down the piston crown temperature. G. H. Oil Pressure Switch Oil pressure switch sends the signal; to low oil pressure indicator lamp provided on the vehicle instrument panel by closing the circuit to ground when the oil pressure is low / below the optimum value.
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