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Ever since I changed my timing belt engine overheats...

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  • Ever since I changed my timing belt engine overheats...

    No coolant leaking. Can the water pump go bad without leaking all over? Should of changed the pump while I had the belt off. It was new back 5 years ago so I thought I would be good to go.

  • #2
    Does the car have the same amount of power as before the belt? Asking because the car will run a tooth off sometimes but will overheat most of the time.
    "The White Turd" 1993 Festiva 144k miles. (Winner of FOTM November 2016)
    sigpic
    "The Rusty Banana" 1990 Yellow 5 Speed Mud Festiva (Lifted with 27" BKT Tractor Tires)(Winner of "Best Beater Award" - Madness 12 - 201

    "Papa Smurf" 1992 Blue 5 Speed Shell
    "Cracker?" (name pending) 1992 White Auto Shell (Future BP Swap)
    "Green Car..." Scrap Car that Runs?!?
    "Red Car..." Complete Scrap Car

    "El Flama Blanca" 1993 Festiva 104k miles. (Lil Brothers Car)
    https://drive.google.com/file/d/0BzM...ew?usp=sharing

    Comment


    • #3
      Originally posted by firebush357 View Post
      Does the car have the same amount of power as before the belt? Asking because the car will run a tooth off sometimes but will overheat most of the time.
      Seems to have the same power. Plenty of coolant too. Do you know if the the pump goes bad does it always leak? Thanks

      Comment


      • #4
        Yes- you should have changed the water pump with the timing belt. Maybe a tensioner isn't tensioning. I cant recall if the pump is run off the timing belt or serpentine.Have you checked the serpentine belt?
        Had that repair done a little over a year ago- the mechanic somehow knocked out the sensor and cooling fan circuit- I could tell later because I'd tested it a day or two before the repair and the fan was coming on at temp.

        The "good news" is that the A/C switch still drives the fan as well as a manual toggle I put in. With a new pump, it hasn't been close to over heating since.
        Last edited by harpon; 11-09-2019, 03:52 AM.

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        • #5
          If you start it up cold and let it idle, how long does it take to get to the point where the temperature gauge is beyond the mid point?
          Last edited by 1990new; 11-10-2019, 06:10 PM.
          Nellie - Yellow 90 5spd LPlus (bought '05 at 44,000 105,811 as of 01/18.)

          Trixie - Dark Charcoal 89 L Auto. Bought 06/15/13 $1800 with 89,000 miles / 95,306 as of 01/18. Power windows and swoopie power
          mirrors. Rio front, Aspire rear, 165/55 R14 Miatas. Mercury Tracer front seats. Gave Trixie to my grandson 09/22/2018.
          Rosie - Red 92 GL 5 Speed Sold to Safety Guy 07/12/2018.
          Bessie - Surf Blue '90 5spd LPlus (bought new) As of 10/2018 354K. No longer in the family.. sold to a forum member 10/20/2018

          During the last 15 years I have also owned and then sold or gave away four other Festivas.

          Comment


          • #6
            Originally posted by jimdigs View Post

            Seems to have the same power. Plenty of coolant too. Do you know if the the pump goes bad does it always leak? Thanks
            I have only ever had to replace one before but it was not leaking when it went bad.
            "The White Turd" 1993 Festiva 144k miles. (Winner of FOTM November 2016)
            sigpic
            "The Rusty Banana" 1990 Yellow 5 Speed Mud Festiva (Lifted with 27" BKT Tractor Tires)(Winner of "Best Beater Award" - Madness 12 - 201

            "Papa Smurf" 1992 Blue 5 Speed Shell
            "Cracker?" (name pending) 1992 White Auto Shell (Future BP Swap)
            "Green Car..." Scrap Car that Runs?!?
            "Red Car..." Complete Scrap Car

            "El Flama Blanca" 1993 Festiva 104k miles. (Lil Brothers Car)
            https://drive.google.com/file/d/0BzM...ew?usp=sharing

            Comment


            • #7
              Could have air in the system. Squeeze the upper hose a bunch of times and see if bubbles come out. Add more coolant after.

              Comment


              • #8
                Have you verified that the thermostat is opening? Sometimes things happen that are unrelated to your expectations.
                Nellie - Yellow 90 5spd LPlus (bought '05 at 44,000 105,811 as of 01/18.)

                Trixie - Dark Charcoal 89 L Auto. Bought 06/15/13 $1800 with 89,000 miles / 95,306 as of 01/18. Power windows and swoopie power
                mirrors. Rio front, Aspire rear, 165/55 R14 Miatas. Mercury Tracer front seats. Gave Trixie to my grandson 09/22/2018.
                Rosie - Red 92 GL 5 Speed Sold to Safety Guy 07/12/2018.
                Bessie - Surf Blue '90 5spd LPlus (bought new) As of 10/2018 354K. No longer in the family.. sold to a forum member 10/20/2018

                During the last 15 years I have also owned and then sold or gave away four other Festivas.

                Comment


                • #9
                  My water pump is 30 yr old and no problems. Does the engine stay hot or does it cool after running a while?
                  Last edited by WmWatt; 11-14-2019, 09:13 PM.
                  Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006.

                  Comment


                  • #10
                    Originally posted by WmWatt View Post
                    My water pump is 30 yr old and no problems. Does the engine stay hot or does it cool after running a while?
                    It keeps getting hotter as I drive. Does not cool down until I turn the engine off. I cannot drive it to work because I know by the time I got there it would have overheated. About a 20 minute one way drive. I have not been driving it because I have my other festiva for winter time.

                    Comment


                    • #11
                      image_20652.jpg This is a link to a great article about engine overheating.

                      https://dannysengineportal.com/autom...-causes-cures/
                      I eliminate the water pump and thermostat from causing the problem by opening the radiator cap and idle the engine until it heats up enough for me to see water coming into the radiator at the top. If you see water flowing, the pump is working and the thermostat is open.

                      Also one of these is very useful to see the true water temperature.
                      I believe the normal thermostat opening temperature is 190 degrees but you can get some to open lower or higher. Some Festivas had two stage thermostats with a smaller opening at lower temperature.

                      IMG_4362 1.jpg
                      Last edited by 1990new; Yesterday, 07:00 PM.
                      Nellie - Yellow 90 5spd LPlus (bought '05 at 44,000 105,811 as of 01/18.)

                      Trixie - Dark Charcoal 89 L Auto. Bought 06/15/13 $1800 with 89,000 miles / 95,306 as of 01/18. Power windows and swoopie power
                      mirrors. Rio front, Aspire rear, 165/55 R14 Miatas. Mercury Tracer front seats. Gave Trixie to my grandson 09/22/2018.
                      Rosie - Red 92 GL 5 Speed Sold to Safety Guy 07/12/2018.
                      Bessie - Surf Blue '90 5spd LPlus (bought new) As of 10/2018 354K. No longer in the family.. sold to a forum member 10/20/2018

                      During the last 15 years I have also owned and then sold or gave away four other Festivas.

                      Comment


                      • #12
                        You can also tell if the thermostat is opening by feeling the big rubber hoses going into and out of the radiator but I can't remember which is supposed to be warm or cool to the touch. Sorry, not much help.

                        An old automotive book I have says the water is pumped out of the bottom of the rad, through the engine, and back into the top of the rad. Until the thermostat opens the water bypasses the rad so the top hose should be cooler than the bottom hose. Once the thermosat opens the top hose should get warm. Sounds about right.
                        Last edited by WmWatt; 11-15-2019, 10:41 PM.
                        Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006.

                        Comment


                        • #13
                          Originally posted by WmWatt View Post
                          You can also tell if the thermostat is opening by feeling the big rubber hoses going into and out of the radiator but I can't remember which is supposed to be warm or cool to the touch. Sorry, not much help.

                          An old automotive book I have says the water is pumped out of the bottom of the rad, through the engine, and back into the top of the rad. Until the thermostat opens the water bypasses the rad so the top hose should be cooler than the bottom hose. Once the thermosat opens the top hose should get warm. Sounds about right.
                          That is correct... The water pump accepts coolant from the bottom of the radiator when the thermostat is open. In addition, anytime the engine is running, whether the thermostat if open or closed, it accepts coolant from the heater through the pipe that crosses over the transmission and across the front of the engine. Coolant also flows through the little bypass hose that comes out the side of the head near the thermostat housing anytime the engine is running.

                          Also, anytime the engine is running, coolant flows through passages out the back of the head into the intake manifold. A temperature sensor screws into the intake manifold which sends sensed coolant temperature signals to the ECA. There is an outlet from the intake manifold which sends coolant into the heater core and another small hose coming out of the manifold which passes coolant into the IAC valve and then out the IAC into another hose into the throttle body and then out into a hose from the throttle body into the hose that goes back into heater outlet pipe.

                          If you coolant seems to be disappearing slowly and you cant seem to find the leak, it could be a very small leak in one of the small hoses mentioned above. The leak may be so small that it only leaks when the engine is hot and them the amount of coolant leaking is so small that it evaporates as it leaks. If this is happening, you may be able to smell the cooked coolant when you open the hood.
                          Last edited by 1990new; Yesterday, 06:52 PM.
                          Nellie - Yellow 90 5spd LPlus (bought '05 at 44,000 105,811 as of 01/18.)

                          Trixie - Dark Charcoal 89 L Auto. Bought 06/15/13 $1800 with 89,000 miles / 95,306 as of 01/18. Power windows and swoopie power
                          mirrors. Rio front, Aspire rear, 165/55 R14 Miatas. Mercury Tracer front seats. Gave Trixie to my grandson 09/22/2018.
                          Rosie - Red 92 GL 5 Speed Sold to Safety Guy 07/12/2018.
                          Bessie - Surf Blue '90 5spd LPlus (bought new) As of 10/2018 354K. No longer in the family.. sold to a forum member 10/20/2018

                          During the last 15 years I have also owned and then sold or gave away four other Festivas.

                          Comment

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