2000 Pontiac Grand Prix GTP.. just got it with a problem.. replaced ect sensor, intake elbows with upgraded metal ones, thermostat, water pump..all brand new parts.... flushed out block, heater core, and radiator.. water flowed through all... car overheats within a couple minutes.. radiator is cold.. is there any way theres a blockage somewhere in the block or the radiator could be plugged enough so the pump cant push the fluid through?? water went through the radiator when i had it out and didnt seem clogged.. when car is warm the heat works so i know the core is getting the hot coolant from the block.. both radiator hoses are somewhat warm but not hot my any means... and coolant in radiator is cold...got me stumped.. any help is very appriciated..
