Question about 2005 Buick Rendezvous

2 Answers

Over heating and blowing cold air from heater

Replaced thermostat two months ago along with oil change and air filter transmission fluids good just started running hot this am went to max hot so pulled over cut off sprayed water on radiator to cool down then checked the water bin its full makes bubbly noises when off on side of road overheating heater in car blowing cold air when running hot also when running hot if raise rpms temp on gauge drops a lil bit need help please any idea?? also fan is running on side of road when car is off I know.

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Find Causes of Engine Overheating
If your engine is overheating, Try this procedure:

  • Dirt and debris can get lodged in the radiator air flow paths. This can block the radiator and cause your engine to overheat and damage the engine.

  • The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on Apr 24, 2015

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  • Expert
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Possibly leaking head gasket. Easiest way to check would be to fill radiator full, start engine and watch coolant level in the radiator cap opening. The top radiator hose will become hot when thermostat begins to allow coolant flow through the radiator. You may have to top off the coolant. Still with the radiator cap off watch for water belching out of the radiator neck. If coolant does belch out of the radiator cap neck, refill with water. If it belches out coolant again it would be combustion gassed forcing the coolant out of the radiator.


This process should take about 1/2 hour to diagnose if it is a head gasket leaking combustion gasses into the coolant.


The radiator fan may run once car is shut off to cool engine compartment to prevent gasoline in fuel lines from vaporizing which would cause a condition called "vapor lock". A car won't start if fuel lines are vapor locked.

Good luck, I hope this helps you to figure out the problem.

Posted on Apr 17, 2014

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Posted on Jan 02, 2017

  • 23 Answers

SOURCE: Heater on and working -

one of two things could be happening... either the radiator is low on coolant or your thermostat is stuck (which if it is stuck you will have to replace) . But first let engine cool down, you need to check coolant level, squeeze one of the radiator hoses even if engine is cooled down to make sure there is little or no pressure in cooling system then remove radiator cap/coolant bottle cap to check level.by the way if it is low you will need to figure out why.. the obvious reason is a leak you may have to go to a shop and have system pressure tested to locate leak to repair.. good luck to ya.. hope this helps

Posted on Mar 20, 2011

  • 21 Answers

SOURCE: I have a 1998 Buick Century and recently my temp gauge was spiking close to the red. It never actually overheated and after pulling the vehicle over for a few minutes the thermostat opened up draining

when the thermostat opened where did the coolant drain to? not understanding. did you put the thermostat in upside down blocking the cool will cause heater to blow cold air. if not, could be radiator itself.

Posted on Nov 16, 2012

  • 978 Answers

SOURCE: When cold start no heat then while driving, gauge

would change top hose plus make sure there is a thermostat fitted

Posted on Jan 30, 2011

skychief2001
  • 21873 Answers

SOURCE: how do you find where my engine is leaking fluid

Sorry to say you probably have engine troubles.
A leaking head gasket will drink the coolant and cause the bubbles to form.
A mechanic can check for leaks by pressurizing the cooling system and also checking for exhaust gas in the radiator.

Posted on Feb 21, 2013

  • 10 Answers

SOURCE: 2005 buick rendezvous I have flushed the radiator

The head gaskets blown

Posted on Sep 25, 2013

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Dec 03, 2010 | 1996 Ford Crown Victoria

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How often should I change the Transmission fluid, normal driving ? Thank you Gary


It's listed in your owner's manual. Schedule A is normal driving conditions.
SCHEDULE "A"
7,500 miles (12 000km) or at 6 months
- Change engine oil.
- Replace engine oil filter.

15,000 miles (24 000km) or at 12 months
- Change engine oil.
- Replace engine oil filter.

22,500 miles (36 000km) or at 18 months
- Change engine oil.
- Replace engine oil filter.
- Inspect front wheel bearings.
- Inspect brake linings.

30,000 miles (48 000km) or at 24 months
- Change engine oil.
- Replace engine oil filter.
- Replace engine air cleaner filter.
- Replace spark plugs.
- Drain and refill automatic transmission fluid and filter (4.7L).

37,500 miles (60 000km) or at 30 months
- Change engine oil.
- Replace engine oil filter.
- Drain and refill automatic transmission fluid and filter (5.2L/5.9L).
- Drain and refill transfer case fluid.

45,000 miles (72 000km) or at 36 months
- Change engine oil.
- Replace engine oil filter.
- Inspect front wheel bearings.
- Inspect brake linings.
- Flush and replace engine coolant at 36 months, regardless of mileage.

52,500 miles (84 000km) or at 42 months
- Change engine oil.
- Replace engine oil filter.
- Flush and replace engine coolant if not done at 46 months.

60,000 miles (96 000km) or at 48 months
- Change engine oil.
- Replace engine oil filter.
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- Replace ignition cables (5.2L/5.9L).
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- Drain and refill automatic transmission fluid (4.7L).

67,500 miles (108 000km) or at 54 months
- Change engine oil.
- Replace engine oil filter.
- Inspect front wheel bearings.
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75,000 miles (120 000km) or at 60 months
- Change engine oil.
- Replace engine oil filter.
- Drain and refill automatic transmission fluid and filter (5.2L/5.9L).
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- Flush and replace engine coolant if it has been 30,000miles (48 000km) or 24 months since last change.
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82,500 miles (132 000km) or at 66 months
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- Replace engine oil filter.
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90,000 miles (144 000km) or at 72 months
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97,500 miles (156 000km) or at 78 months
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105,000 miles (168 000km) or at 84 months
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120,000 miles (192 000km) or at 96 months
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- Replace spark plugs.
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Transmission shifting hard and heater blowing cold air when idlin


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2 Answers

94 Grand AM NO HEAT, just blows cold air


your description ends. what have you put in...
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check your thermostat
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Cold and no heat


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