how easy is changing the thermostat yourself
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Northstar Engines and System Technical Discussion Discussion, how easy is changing the thermostat yourself in Cadillac Engine Technical Discussion; how hard and how much work is it to replace the thermostat in this car... AND where is it LOCATED?...
  1. #1
    drapedupDTS is offline Cadillac Owners Member
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    how easy is changing the thermostat yourself

    how hard and how much work is it to replace the thermostat in this car... AND where is it LOCATED?

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  3. #2
    dirt_cheap_fleetwood's Avatar
    dirt_cheap_fleetwood is offline Cadillac Owners Master
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    Re: how easy is changing the thermostat yourself

    First question, what car? Edit your profile and put it in there.

  4. #3
    Sinister Caddy is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    I see the post tags say "2002 deville"

  5. #4
    drapedupDTS is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    yeah the car is a 2002 cadillac deville

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    It's at the end of the lower radiator hose. Why are you changing it?

  7. #6
    wv94deville is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    i just replaced mine in 1994 deville was very easy

  8. #7
    drapedupDTS is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    Quote Originally Posted by Ranger View Post
    It's at the end of the lower radiator hose. Why are you changing it?

    http://www.cadillacforums.com/forums...uctuating.html

    the reason i am changing is that my temp guage on the dash fluctuates up and all day... had my looked at a few weeks ago at a gm dealer and said for the most part it's the thermostat... no leaks, loss of performance, or smells of coolant... the only issue i have is temp guage fluctuating due to the thermostat not opening enough i guess and just not working properly... i will bring it to a dealer tomorrow to get fixed got quoted a 100 bux+ part and taxes. already had it tested with a pressure test to check for leaks and none found.

  9. #8
    dirt_cheap_fleetwood's Avatar
    dirt_cheap_fleetwood is offline Cadillac Owners Master
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    Re: how easy is changing the thermostat yourself

    Its supposed to fluctuate, especially when driving in traffic. On a normal car driving in traffic it can go from 220-230 when stopped to as low as 185-190 when you start driving again. The thermostat will open and close when it needs to to keep the engine in operating temperature. If the car does not overheat the the thermostat is opening far enough. The dealer is trying to jip you.

    The only reason you need to replace it is the engine is either constantly cold (you will not get cabin heat if that is the case) or if the engine overheats for no other explanation. If neither of those are occurring the thermostat is working fine. A normal thermostat will start to open at around 180 but will not be fully open until near 215, so there will always be temperature differences as you drive. Your fans will then kick on at around 223 to keep the engine from getting to hot.

  10. #9
    AMENCADDY's Avatar
    AMENCADDY is offline Cadillac Owners Enthusiast
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    Re: how easy is changing the thermostat yourself

    How's the weather where you are? could the increase in your temp gauge reading be due to "global warming"!

  11. #10
    drapedupDTS is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    well i took the car to the dealer today.... and comes out they saying its a head or head gasket issue... left the dealership pretty much devastated with the 5K pricetag for the repair... so i carefully drove the car back home with in the past few weeks the car got hot after a few minutes... which now it runs just fine... drove it about 25 miles total today and no problems... the service guy said that i was loosing collant from my overflow tank outlet... but the thermostat and all are fine... i only plan on keeping this car for about 10 more months... so i really dont feel like paying 5k on a car maybe work 7k... more than likely will get my uncle to fix it or a bottle of steel seal... i've read good unbiased reviews on the product.

    at this time i am really rethinking about getting another 4.6, 07 dts next year...

  12. #11
    Ranger's Avatar
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    Re: how easy is changing the thermostat yourself

    Forget the repair in a bottle. It won't work.

  13. #12
    dirt_cheap_fleetwood's Avatar
    dirt_cheap_fleetwood is offline Cadillac Owners Master
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    Re: how easy is changing the thermostat yourself

    Feel the inside of your exhaust pipe. If it feels slimy then your head gaskets are toast. If not then you shouldn't worry too much. Check your engine oil for coolant and the coolant for oil. If there is one in the other the head gaskets toast.

  14. #13
    drapedupDTS is offline Cadillac Owners Member
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    Re: how easy is changing the thermostat yourself

    Quote Originally Posted by dirt_cheap_fleetwood View Post
    Feel the inside of your exhaust pipe. If it feels slimy then your head gaskets are toast. If not then you shouldn't worry too much. Check your engine oil for coolant and the coolant for oil. If there is one in the other the head gaskets toast.
    no slimy exhaust just your reg dry black soot... as its always had... just had a oil change last week and they found nothing, also just had my coolant checked yesterday and they found nothing... drove the car to the store and work and no signs at all...

  15. #14
    dirt_cheap_fleetwood's Avatar
    dirt_cheap_fleetwood is offline Cadillac Owners Master
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    Re: how easy is changing the thermostat yourself

    Then don't worry about the head gaskets. It is a very common problem but your car seems fine. The dealer is just trying to scare you into forking over $5k.

  16. #15
    kckranz's Avatar
    kckranz is offline Cadillac Owners Fanatic
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    Re: how easy is changing the thermostat yourself

    I had this symptom on my Nissan Altima and it turned out to be a loose connection on the coolant temperature sensor.

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