Hello Fellow Techs, 97 Chev malibu, with LD9 2.4 engine, thermostat under waterpump in the return (cold) side of rad hose. Only part available is 180 F thermostat. this Car is not getting good fuel economy, at 60-70 mph LT fuel is at -9 to -13,(-106 to -102) a... Login to read more.