Question about 2003 Oldsmobile Silhouette

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I have a 2003 silhouette and it ia overheating and the heater isnt working. I have replaced the thermostat, water pump and radiator cap. Also flush the radiator and blead the air. Know Im cleaning the coils. Their are no milky subs. or water or bubbls in the oil. I dont know what else to do, can anyone help. Pittmann

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  • Contributor
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I would check everything EdCarCal said. Also check if the coolant is going in the heater core and returning. Make sure the coolant level is full. If you have leak and the level gets too low the heater will not blow warm air.

Posted on Dec 16, 2017

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  • Oldsmobile Master
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You should feel a temperature gradient across the radiator (hot at bottom, cooler at top) if the cooling fluid is circulating properly. If not, you are not getting proper circulation. All things being equal, check the thermostat again - if it was installed incorrectly or is faulty (not unusual), it is not opening and will cause this. Otherwise, you have a blockage somewhere in the system (such as a collapsed hose or blocked port at the pump).

Posted on Dec 16, 2017

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Posted on Jan 02, 2017

Anonymous

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SOURCE: radiator overheating

hey im having a problem with my 96 cirrus overheating. i think its the fans. they dont seem to turn on unless i let the hood drop, then they suddenly kick on. the fuse is good.. any ideas??

Posted on Jul 25, 2008

Anonymous

  • 1 Answer

SOURCE: overheAting

I had that problem before, the intake manifold gasket leaks. After replacing it runs like a charm. I have an '01 also and still have it.

Posted on Aug 25, 2008

autodr

autodr

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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

Anonymous

  • 740 Answers

SOURCE: engine overheating-----1994 Olds Cutlass Supreme 3.4 liter v/6

There seems to be an air pocket or no antifreeze in engine block. Try this method disconnect upper radiator hose and pour water directly into hose down into engine block until it full. when its filled reconnect hose and fill up radiator. as the vehicle warms up open bleeder valve on the thermostat housing and release air from system. open slowly and BE VERY CAREFUL WATER WILL BE HOT, bleed until you get a steady stream opening and cosing valve. However if all of this don't work. You may have a bad pump. Good Luck

Posted on Dec 27, 2008

colin white

  • 345 Answers

SOURCE: peugeot expert 2.0 hdi heater problem, fan working ok, no heat

check the water pump

Posted on Feb 07, 2009

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1 Answer

Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
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My 2002 Oldsmobile Silhouette keeps overheating. We replaced the thermostat and flushed the system by adding new antifreeze. The air blows cold from the heater when the car starts to overheat. Once


there can be air pocket somewhere you need to bleed system properly. rais the front let is idle bleed it thru bleeding screw. be sure that bubbles are over.

air pockets prevent coolant travel inside system. so it may not reach to radiator, or cabin heater or both.

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I have a 1999 oldsmobile intrigue with a 3.5 engine and it is overheating what might be the problem?


It's usually the thermostat, I woud pressure test the cap. It may need to be flushed. Are the fans working? Is there a 50/50 mix of anti-freeze

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My car overheats very easy.i can drive 1 exit on the highway and the temp goes up very fast. i dont know what it could be. there is always fluid in the reserve area and doesnt seem to be getting low or im...


COULD BE THERMOSTAT IF TOP RADIATOR HOSE IS NOT HOT AND BOTTOM RADIATOR HOSE GOING TO WATER PUMP IS HOT THE THERMOSTAT STICKING PARTIALLY CLOSE.IF TOP HOSE IS HOT THE RADIATOR,ENGINE BLOCK HEATER CORE NEED FLUSHING OUT.IF WATER PUMP WEEP HOLE LEAKING REPLACE WATER PUMP, FAULTY WATER PUMP WILL CAUSE ENGINE TO OVER HEAT.REPLACE RADIATOR CAP MAKE SURE YOU HAVE 50 / 50 MIX SOLUTION ANTIFREEZE AND WATER IN COOLANT SYSTEM. IF ALL LOOKS GOOD CHECK ENGINE OIL ON DIP STICK, IF OIL IN DIP STICK LOOK LIKE MILKSHAKE YOU HAVE BLOWED HEAD GASKET THAT WILL CAUSE ENGINE OVERHEATING WHILE DRIVING CAR IN SHORT DISTANCE AND ENGINE OVERHEATING.

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yes. the impellor on these engines have a tendency to come off the water pump.First you can see if the pump is working by removing a heater hose then have someone to start the engine. if the water sprays a good, solid stream out then the water pump is good. if the water just barely comes out or not at all then the pump is weak or "bad".

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I have a overheating issue with my blazer. It has a 4.3 liter vortex engine, I replaced the thermostat, water pump appears to be working. Anything else I should look at


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2003 towncountry over heating.replaced rad and thermstat but still over heating what the f cuold it beit has a 3.3 ....the rad had side blown out to begin with replaced it with upper,lower hoses and...


1. With what you have replaced, the only remaining credible explanation is the Water Pump. If the Water Pump is not operating correctly, this will cause overheating. The Radiator -"side blow out"? Did the radiator cap you have on not work. Overheating should cause fluid = steam to blow out the cap and not blow out the side of the radiator.
2. One thing you can do before replacing the Water Pump is to flush your entire system. There could be a blockage in the system. These flushing kits are available at most stores (Walmart or Autoparts Stores) and you can do it yourself.
3. Was the Engine Coolant Temperature Sensor (mounted near the thermostat) also changed out? If this was malfunctioning it could be giving you a false reading.
The Water Pump is the likely culprit if the Van is truely overheating.
Let me know if this helped, or if you have additional questions or information. Feel free to contact me at FixYa.com!

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