Results 1 to 4 of 4
Discuss What are symptoms of bad thermostat? (Corolla) in the alt.autos.nissan forum at Car Dealer Forums; Two symptoms make me wonder whether my 1994 Corolla has a faulty / sticky thermostat. ...
  1. #1
    Al
    Guest

    Default What are symptoms of bad thermostat? (Corolla)

    Two symptoms make me wonder whether my 1994 Corolla has a
    faulty / sticky thermostat.

    First, in cold weather, when I ride at highway speed as the car is
    warming up, it seems to take a long time before the car kicks
    into its highest gear. I have an automatic, but in cold weather it
    doesn't seem to transition smoothly and quickly into its top gear.

    Then the other day in the cold weather, the heater just didn't
    seem to be blowing out air that was as hot as it should be.

    Sometimes the needle on the dashboard thermostat stays
    smack on Cold, and sometimes it moves a slight bit above it.

    Do these symptoms point to a faulty thermostat?

    If so...are there special things to be aware of when replacing
    it? I have put one or two in over the years in other cars, but
    I've never drained the antifreeze, etc. I've just put the new
    thermostat in and topped up the antifreeze. Thanks in advance
    for any advice.


  2. #2
    E Meyer
    Guest

    Default Re: What are symptoms of bad thermostat? (Corolla)

    I didn't know Nissan made Corollas. Why are you posting this in the Nissan
    group?


    On 12/7/06 11:37 AM, in article
    1165513068.426653.55910@73g2000cwn.googlegroups.co m, "Al"
    <acunniff@advancedbionutrition.com> wrote:

    > Two symptoms make me wonder whether my 1994 Corolla has a
    > faulty / sticky thermostat.
    >
    > First, in cold weather, when I ride at highway speed as the car is
    > warming up, it seems to take a long time before the car kicks
    > into its highest gear. I have an automatic, but in cold weather it
    > doesn't seem to transition smoothly and quickly into its top gear.
    >
    > Then the other day in the cold weather, the heater just didn't
    > seem to be blowing out air that was as hot as it should be.
    >
    > Sometimes the needle on the dashboard thermostat stays
    > smack on Cold, and sometimes it moves a slight bit above it.
    >
    > Do these symptoms point to a faulty thermostat?
    >
    > If so...are there special things to be aware of when replacing
    > it? I have put one or two in over the years in other cars, but
    > I've never drained the antifreeze, etc. I've just put the new
    > thermostat in and topped up the antifreeze. Thanks in advance
    > for any advice.
    >



  3. #3
    Al
    Guest

    Default Re: What are symptoms of bad thermostat? (Corolla)

    Oops. Sorry, I own a Toyota and a Nissan, and I got my newsgroups mixed
    up!


  4. #4
    al
    Guest

    Default Re: What are symptoms of bad thermostat? (Corolla)

    If the temperature gauge indicates that the coolant is not reaching the
    correct operating temperature, then the thermostat is sticking in the
    open position. The thermostat should maintain a minimum temperature.
    If the engine is consistently operating below that temperature, the
    thermostat has failed. I'd expect that if you sit at idle during
    warmer weather, the temperature gauge will creep up to normal
    temperature but will drop back to "cold" as soon as you drive forward
    and get increased air flow through the radiator. Lower coolant
    temperature will cause the ECM to run the engine and transmission as if
    it's operating during warm-up.
    The replacement is the same as you're familiar with. Once you find the
    housing where the thermostat is located, you drain the radiator via a
    drain plug in the radiator or by removing the lower radiator hose. You
    might need a new gasket for the housing. I'm not sure about a 1994
    Corolla but some Nissans require a bleeding procedure through a bleeder
    valve in the engine block when refilling the system with coolant. My
    old 1975 Corolla didn't have that bleeder valve. If you've done a
    thermostat replacement before, it's still essentially the same process.
    Good luck. Al

    Al wrote:
    > Two symptoms make me wonder whether my 1994 Corolla has a
    > faulty / sticky thermostat.
    >
    > First, in cold weather, when I ride at highway speed as the car is
    > warming up, it seems to take a long time before the car kicks
    > into its highest gear. I have an automatic, but in cold weather it
    > doesn't seem to transition smoothly and quickly into its top gear.
    >
    > Then the other day in the cold weather, the heater just didn't
    > seem to be blowing out air that was as hot as it should be.
    >
    > Sometimes the needle on the dashboard thermostat stays
    > smack on Cold, and sometimes it moves a slight bit above it.
    >
    > Do these symptoms point to a faulty thermostat?
    >
    > If so...are there special things to be aware of when replacing
    > it? I have put one or two in over the years in other cars, but
    > I've never drained the antifreeze, etc. I've just put the new
    > thermostat in and topped up the antifreeze. Thanks in advance
    > for any advice.



Similar Threads

  1. Bad thermostat symptoms?
    By Al in forum alt.autos.toyota
    Replies: 16
    Last Post: 12-11-2009, 02:05 PM
  2. Thermostat 93 corolla
    By Pinkman in forum alt.autos.toyota
    Replies: 2
    Last Post: 02-13-2008, 05:31 AM
  3. 2004 corolla thermostat location
    By Ray O in forum alt.autos.toyota
    Replies: 0
    Last Post: 02-13-2007, 08:24 PM
  4. OVP relay symptoms?
    By Guenter Scholz in forum alt.auto.mercedes
    Replies: 7
    Last Post: 11-27-2006, 01:25 AM
  5. Two Symptoms I'm Having In My Windstar
    By Dutch Buckhead in forum alt.autos.ford
    Replies: 3
    Last Post: 10-19-2006, 12:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •