any more suggestions?
Asked by bbridgon2005 Mar 05, 2016 at 11:33 PM about the 2005 Pontiac Grand Prix GTP
Question type: Maintenance & Repair
the car has had a new water pump, new thermostat, and supposed new water hoses. I had three different people look at it and no one looked at the radiator. But after working for while it was evident that the water hoses were not filtering water through. Some releases of air from the top hose by unclasping air to release and water to run through the top hose made the heat rise only to the mid point. Having trouble getting to the lower hose. But have been told to make sure there is no air in the lines which is my main focus right now good luck to all
2 Answers
Leave the radiator cap off over night, if there's air in the radiator it should rise to the top or the highest place in the cooling system. If there's no air bleed screw in the system, next day when engine still cold; and leaving the radiator cap off... let it run at idle until the engine and radiator are hot ,not being under pressure with the radiator cap off the air should escape through the open radiator. Need to mention that DO NOT REMOVE RADIATOR CAP UNTIL THE ENGINE AND RADIATOR FEEL COOL TO TOUCH AND ENGINE IS OFF.EVEN COOLED DOWN THERE MAY BE SOME PRESSURE IN SYSTEM, SO BE CAUTIOUS. ALSO WHEN RUNNING THE NEXT DAY, THE COOLANT MAY BEGAN TO OVERFLOW OUT THE TOP OF RADIATOR AS THE ENGINES THERMOSTAT OPENING, AFTER SOME OVERFLOWING IT SHOULD STOP ...IF NOT CAREFUL REPLACE RADIATOR CAP....AND IMPORTANT. ..DO NOT TURN OFF ENGINE UNTIL THE RADIATOR CAP HAS BEEN REINSTALLED OR COOLANT WILL SPEW OUT OF THE OPEN RADIATOR. TOP OFF COOLANT IN RADIATOR WHILE ENGINE IS RUNNING AND WARMED UP,IF NOT ABLE TO TOP OFF RADIATOR THEN REINSTALL THE RADIATOR CAP MAKE SURE IT'S ALL THE WAY ON SEATED,THEN TOP OFF THE COOLANT OVERFLOW TANK.As the engine cools.it causes a vacuum and draws the coolant from the overflow tank into the radiator. This is really a very easy to do process and takes about 20 minutes to perform and should remove any air lock in cooling system if there's no leaks and water pump is good and thermostat is operating correctly. One thing I forgot to mention is to make sure that you have the car heater turned all the way to hot.that keeps the air from being stuck in the heater core and heater hoses. For a couple of days before you start the engine check and make sure the coolant overflow container is full to the cold mark. And do not remove the radiator cap, that may reintroduce air into the system again. Check coolant level at overflow container only. Unless you have a problem with the system. There are lot's of other reasons for the coolant temperature to show running colder then normal Not sure why you believe that you have a air lock in the system. Usually air in the system will cause over heating problems, if coolant is not circulating the engine will get very hot pretty fast, about 5 to 10 minutes of driving engine would be overheated, cooling system making popping noises and the heater blowing cold or only warm air with a hot engine. Air in system possible but I don't think that is the problem. If there is a problem?