Question about 1991 Toyota Supra

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My 87 toyota supra turbo havin issue with low antifreeze and getting overheat. already replace thermostat and replacin the radiator cap. also did check on the antifreeze for any color change or mix with oil but no sign of color change also for the oil. just pour in some radiator leak seal and its seem to be okay now but do need more resources.

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  • yeesir Oct 13, 2010

    thnks,..the waterpump was replace 5k miles ago and yea there is leaking out from it. i guess these motor tan to havin such issue like this and bhg.

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Hi,

Have a look around the engine coolant hose's for any leaks, just need to find where there is any green trace from the anti-freeze.

If it is not going into the engine then it must be leaking externally.

Hope this helps, let me know if you need more information.

Thanks

Jason

Posted on Oct 13, 2010

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  • Master
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Hi, it is obviously the low antifreeze that is causing the overheating which is due to a leak somewhere.
Now about the leak, - get down under the car and look up under the waterpump (use flashlight), - there should be a "weep hole" underneath the waterpump on the casting, - it is to let water (that is leaking) out, - so that the bearings won't fail (real fast)! If you see water dripping, - (and a little trail of dried chemical stuff), - the waterpump is on the way out, - and will probably totally fail soon! Obviously you want to fix this, (and maybe water loss will stop)!
There has to be some problem - if water level keeps dropping!-- If pressure cap is good, it will let "expansion water" run out into "reserve tank", and as engine cools off, it will pull the water back in to fill the raidiator. If you have small leak, it will pull more and more out of reserve till it is completely empty, and then you get the overheating, (getting progressively worse till the engine destructs),-- if you don't keep refilling!

But since you have pour in some radiator leak seal, that will go along way to help seal the leaks..

Posted on Oct 13, 2010

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  • Tunde Autos
    Tunde Autos Oct 13, 2010

    Alright, you can now accept the solution...

  • Tunde Autos
    Tunde Autos Oct 13, 2010

    Alright, you can now accept the solution...

  • Tunde Autos
    Tunde Autos Oct 13, 2010

    Alright, you can now accept the solution...

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