Question about Oldsmobile Alero
You have to bleed the air out of the system, there is a small brass valve( maybe 2 valves in the front of the engine compartment ) that must be opened to allow the air to escape. Engine must be running while bleeding the coolant
Posted on Nov 25, 2013
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Posted on Jan 02, 2017
SOURCE: Overheating and heater not work
there is a valve on the water pump and one on the thermostat housing open those up one at a time until you get a little bit of antifreeze come out then tighten them back up. All you will be doing is bleeding the air out of the cooling system. my car was doing the same thing after I changed my thermostat.
Posted on Dec 12, 2008
Get a compression check to find out if you have a bad head gasket, I have a 96 with the 3.8L that had the same problems at first. then it started to blow out antifreeze thru the expansion tank, the head gasket finally blew the rest of the way going down the highway
Posted on Dec 04, 2009
A couple of things to check because as you describe your symptoms you actually have 2 problems
1. No heat from vents.
Sounds like the heater water flow valve cable is kinked disconnected or the valve itself is stuck You will need to follow your heater core water supply lines to find the valve usually to the right of the center console in the ducting area / large plastic housing for heater and AC internal coils. If the valve works then there is a possibility that the heater core water supply lines have been bypassed on the engine side of the firewall with a coupling due to a leaking heater core. And l;astly the heater core could just be clogged. (quite rare!!)
As for the overheating engine after all of the work you have done.. Perform this simple test.
1. remove radiator cap
2. have someone else start the car
3. watch for water coming out of the open radiator cap area DURING start...
4. have person in the car rev engine gently 2 or 3 times. No need to exceed 2000 RPM. If water rapidly flows out of the radiator during engine revs.. you have some major engine issues.
If it passes all of these checks then the only thing left is improper hose connections on the engine side of the firewall and or a hydraulic water lock in the block that should clear itself by starting and stopping the engine many times with the radiator cap off.
Posted on Jan 27, 2010
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