Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

faulty thermostat??

  • 17-08-2013 8:22pm
    #1
    celica1994
    Registered Users, Registered Users 2 Posts: 703 ✭✭✭


    hi, my Passat 130bhp tdi recently has had problems starting from cold, have replaced both coolant temp sensors but doesn't seem to help, I noticed the car is only raising to about 70 celcius coolant tempature on the gauge, could this possibly be the thermostat?


Comments

  • #2
    coylemj
    Registered Users, Registered Users 2 Posts: 25,620 ✭✭✭✭coylemj


    What temperature did the needle previously go to? A faulty thermostat shouldn't affect the car's ability to start in hot or cold weather.


  • #3
    celica1994
    Registered Users, Registered Users 2 Posts: 703 ✭✭✭celica1994


    it usually sits at 90 when it comes fully up to tempature but now it sits at 70


  • #4
    unkel
    Registered Users, Registered Users 2 Posts: 66,118 ✭✭✭✭unkel
    Chauffe, Marcel, chauffe!


    Thermostat is possibly stuck open, but as coylemj said, that wouldn't make any difference on starting the engine from cold

    Lotus Elan turbo for sale:

    https://www.donedeal.ie/vintagecars-for-sale/lotus-elan-turbo/38336785

    My ads on adverts.ie:

    https://www.adverts.ie/member/5856/ads



  • #5
    coylemj
    Registered Users, Registered Users 2 Posts: 25,620 ✭✭✭✭coylemj


    celica1994 wrote: »
    it usually sits at 90 when it comes fully up to tempature but now it sits at 70

    Any competent mechanic should be able to sort you out. The thermostat will typically be set so that the engine runs at an optimum temperature, if it's running at a lower temperature then you're probably using more fuel and there will be slightly more wear on the engine.

    It's supposed to open and close so that the coolant around the engine is maintained at the optimum temperature. If it stays open then the coolant is permanently circulating through the radiator where it gets cooled and the engine will run at a lower temperature, if it stays closed then the coolant will rapidly heat up and your needle will go to the right very fast.


Advertisement