Question about 2001 Oldsmobile Alero

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I changed the thermostat on my 01 olds alero but it still overheats. i have a small leak from the coolant expansion tank but not a big enough one to drain the whole tank. it seems like the tank overfl

Start car fine, heater doesnt blow hot unless temp gauge is at halfway point and car is going at least 30 mph, then suddenly stops blowing hot air and temp gauge spikes all way up to red. i have already changed the thermostat.

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Try checking your water pump the fluid just my be sitting there n not circulating or is poorly flowing n also check your heater core it might be clogged might need replaced

Posted on Apr 22, 2013

  • Brenda Patterson
    Brenda Patterson Dec 09, 2014

    My Alero is doing the same thing. Coolant level is fine. Mine hasn't spiked into the red area on the temp gauge yet. I think Im just going to get rid of it.

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Posted on Jan 02, 2017

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autodr
  • 260 Answers

SOURCE: Olds silhouette heater blows cold air

as long as the engine temperature is normal, i would suspect a clogged heater core, the dex-cool antifreeze is notorious for building up deposits in cooling system. have heater core flushed first to see if it makes any difference

Posted on Nov 16, 2008

jackiaria
  • 350 Answers

SOURCE: No heat in 1998 Olds Intrigue (daughters car). Please help ASAP!!

It sounds like a thermostat.... $100-$150 repair shop.........$20 part if you do it yourself !
Go to an auto parts store and have them read your codes to determine why the Check Engine Light is on and to confirm any problems. Advanced Auto Parts will usually do this for free!
Did you check the fuses usually located under the dash on the drivers side or under the hood?

Posted on Jan 21, 2009

  • 31 Answers

SOURCE: coolant leak on 96 olds ciera 3.1

Head gasket. The reason for the cold then hot readings is the cooling system is getting gas bound by exhaust gases. A simple intake leak would just make you loose fluid, but wouldn't cause the other symptoms until the coolant was very low. Which leads me to, is the coolant full? The head gasket most of the time will not leak coolant into the oil, but instead coolant will go into the combustion chamber, and exhaust gasses will go into the coolant. You don't see any white smoke until the leak gets extreme. Then shortly after that the engine hydro locks from too much coolant in the combustion chamber. There is a tester that will test your coolant for CO gas. That is the proof of a head gasket leak.

Posted on Feb 09, 2009

wracefans24
  • 1985 Answers

SOURCE: 1999 Oldsmobile Bravada Heating Problem

when engine is cold remove radiator cap and check coolant level,sounds like it is really low and has an air pocket in it.

Posted on Dec 11, 2009

  • 416 Answers

SOURCE: heater blows hot air for awhile but than blows

check coolant level in radiator and coolant bottle sounds like it may be low on coolant

Posted on Feb 09, 2010

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1 Answer

Overflowing from expansion tank on a 2003 chevy malibu


Have a cylinder leakage test performed to check your head gasket. It dosn't have to overheat to have a head gasket problem. A leakage test checks if looseing combustion gases to the cooling system which would presurise the system higher than normal which causes the tank to overflow.

Sep 30, 2012 | 2003 Chevrolet Malibu

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My car dumped all the water that was in it and now try's to overheat slowly is it my water pump or my coolant expansion tank thats the area it dumped at the passenger side or is there nothing majo


Coolant leaks on the path of least resistance, in this case it's the cap to the coolant reservoir. Overheating is caused by a few things:
1. Bad water pump
2. Clogged thermostat
3. Bad fans

May want to check a few of these components.

Jun 17, 2017 | 2000 Oldsmobile Alero

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2000 vw beetle 2.0 L, low level coolant light...engine mil code 1256


not the pump but air in the system or a broken wire to the coolant level sensor
that sensor at the top of the radiator tank has to be completely immersed in coolant or the circuit is broken and the light comes on
same effect id the wire to that sensor is broken in the insulation

Jun 16, 2017 | Cars & Trucks

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Overheats when idiling and overheats , cools down , overheats when driving. Have replaced the thermostat but is still doing the same thing. There are no apparent waterleaks. No water in the oil and runs...


When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

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Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

===

Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

===

A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

===
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Sep 26, 2009 | 2002 Pontiac Grand Am

4 Answers

2001 Olds Silhouette overheating, please help


Just had the same problem with my van was a cracked head

Jun 25, 2009 | 2001 Oldsmobile Silhouette

2 Answers

1991 overheating Towncar


If car heats up quickly and overheats , the problem is the thermostat. The thermostat stays closed and traps coolant in the engine untill it reaches about 185 degrees , than the thermostat opens and allows coolant to flow to the radiator where it is cooled by airflow. ( airflow while driving is usually sufficient ) while idling , or in slow trafic , the fan keeps air moving through the rad. The heater core is strictly for heat in the winter inside the car. The thermostat is the most likely cause of the problem , and even if it was good before , the overheat / boil situation likely cooked it anyways. I am assuming the water pump is still getting turned by a belt. No water circulation by pump would cause same symptom as bad thermostat. Overflow and expansion bottles are designed several different ways on different cars , but the theory is that as the engine heats up and the coolant expands , it goes to the tank. Later , as engine cools down after being shut off , coolant contracts. Radiator is replenished by coolant returning from expansion bottle.

Jun 04, 2009 | 1991 Lincoln Town Car

1 Answer

ONGOING COOLANT LEAK


replace your coolant reservior cap; the rubber ring has become brittle and "steams" the coolant out as you drive

Apr 21, 2009 | 1997 BMW 318

1 Answer

Water leak from top of expansion tank.2000 BMW 316i se


The water (coolant) in the expansion tank will rise and fall with the engine temperature. What the expansion tank does is collect and return coolant to and from the engine. When the engine warms up the coolant gets hot, builds up pressure and opens up the radiator cap. The coolant then goes into the expansion tank. Now when the engine cools down the pressure drops in the cooling system and the pressure drop (vacuum) pulls the coolant back into the engine via the radiator cap. The radiator cap allows the cooling system to build up pressure and by doing so increases the boiling point of the coolant, but when that pressure exceeds the caps rating the cap opens and the coolant goes to the expansion valve. The cap has another part to it that when the engine cools down and a partial vacuum is created in the cooling system a "valve" in the radiator cap opens and allows the coolant to be drawn back into the engine. I would look at your radiator cap to see if any gunk or build up is on it, and check the rubber gaskets for cracks. It's easiest just to replace the cap because they are inexpensive and easy to replace (2-10 dollars). The expansion tank should have two hoses on it. The one on the bottom comes from the radiator and the one on the top (possibly part of filler cap) runs down and is open to the ground. That way if it is overfilled or becomes overfilled it will slowly leak onto the ground. When and if you change your radiator cap, make sure the engine is cooled down, remove cap and start engine and turn heater to full blast, full heat. Leave the cap off and let it run until engine warmed up. This should burp out any air pockets that may have happened when coolant was changed. Also top off the coolant in the radiator while it is running. Hope this helps and good luck

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1 Answer

2002 oldsmobile alero coolant light and fuel


You must always check the coolant hot, expansion will cause a big change in level, how low was it? top it off hot and then drive a few days and recheck the level, I don't think you have an issue here.

Jul 15, 2008 | 2002 Oldsmobile Alero

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