"car is over heating 1stjust got the car - dont know what turbo engine is it how can i find out got a water pump for a 88 it fit but the in side grove are deeper then the 1 it had on look like it work flush rad not the block and flush oil cooler ok does the spring goes on top or bottem ofthe bypass valve put new oil,thermostat,fan direct plastic 1 on car stay cool while park but overheat when driving took thermostat off it wont overheat if heater is on but same it goes a bit pass half way when driving and it cool down alot when slowing down at stop light or park car dont seem to be hot no water or oil sound car run good and stong smoke a littel bit when 1st turn on 1st min or so no water in oil can it be the senser ? i need help"

plz