Question about Buick Rendezvous

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My rendezvous buick is running hot. the engine light has not came on...there is no heat comming into my trck when i turn on the heater. i have anti freeze in the truck but it has turned a burnt orange color. i have ot driven my truck due to a mechanic telling me my head gasket is cracked. i was also told that i need a new therm... what shoud i do? if the head is cracked would i still be able to drive it ? there are no leakes..should i have it fixed or look for another truck? please help ...mom of five

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  • perez2103 May 21, 2011

    MY FANS ARE WORKING... I HAVENT LOST ANY COOLANT...SO IT SOUND LIKE IT MAY BE A GASKET PROBLEM... HOW MUCH WOULD THIS PART RUN ME.. HOW MUCH IS LABOR ON AVG. SHOULD I JUST REPLACE THE ENGINE?

  • perez2103 May 21, 2011

    HOW MUCH WILL IT RUN ME TO REPLACE THE HEAD GASKET?

  • perez2103 May 21, 2011

    I WILL REPORT BACK ONCE I HAVE THE PRESSURE CHECKED... THANX SO MUCH!!!

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Hi,

The thermostat is one of the things that could cause this problem. Here are some other things:
-The cooling fans-If they are not coming on at the correct time or not at all then they could cause an overheating problem.
-Cooling system leak-If there is a leak in your system then you would be losing coolant which would make your car overheat.
-Shrouds missing-If your shrouds and air dams are missing or not attached correclty they could cause this type of problem.
-Bad Head gasket-this would cause all of the problems that you are having.


These are the most common causes of this type of problem. I would recommend taking it to a reputable repair shop and having them do a "pressure test" on your system, this will show if you have any leaks. The I would have them check out the cooling fans to be sure that they are working properly.

Note - if that coolant if full and that fan is running.9 times out of 10 there is a bad head gasket allowing some compression to get into the coolant system and cavitating the coolant.since the coolant system max is 15 PSI the compression is more psi than 15 and it will actually slow down or stop the coolant flow threw the engine and cause this.its usually the rear head gasket that does this.but always change both head gaskets when its apart.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on May 21, 2011

  • taran_2005
    taran_2005 May 21, 2011

    Thanks for your response!!

    The headgasket set is around $100 and the labor is 7.3 hours. These
    rates could be a little different from shop to shop but that is around
    what they should charge as it is the book rate. I would expect to spend
    around $900-$1000 for the job.

    Next, I would not replace the entire engine assembly, The engine will
    cost you $1700, but the labor will cost you another $1300 ..I would
    repair the engine that you already have and save the $$$$$


    Let me know,if needed further assistance.

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!

  • taran_2005
    taran_2005 May 21, 2011

    Thanks for your response!!

    I did mention the details in the last comment.

    Let me paste the details again :-

    The headgasket set is around $100 and the labor is 7.3 hours. These
    rates could be a little different from shop to shop but that is around
    what they should charge as it is the book rate. I would expect to spend
    around $900-$1000 for the job.

    Next, I would not replace the entire engine assembly, The engine will
    cost you $1700, but the labor will cost you another $1300 ..I would
    repair the engine that you already have and save the $$$$$


    Let me know,if needed further assistance.

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!

    You would be looking to spend around $1000 for the same.

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Technically, that's impossible. The heating system in your car gets its heat from the engine. If the engine is running, then it will generate heat and there's no stopping that. The only thing that would prevent the heat from getting into the air that's blowing into the car is if the air selector is set to "Recycle" instead of "Fresh".

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If the top hose is hot and the bottom is cold, your definitely not getting circulation. You,ve already done alot of work to this vehicle so you have pretty much answered your own question. About the only thing left is the heater core. Of course, I dont want to be the one to tell you it is definitely the heater core because obviously I am not looking at the vehicle. But If i was a betting man, thats where my money would be.

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