Question about 1999 Volvo S80

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Location of thermostat and replacement

Just bought 1999 Volvo S80 t6. have boil back to coolant resevoir and its boiling, any suggestons??

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  • ken1027 Jun 22, 2008

    Just bought 1999 Volvo S80 t6. have boil back to coolant resevoir and its boiling, any suggestons??



    Also location of thermostat??

  • Anonymous Jan 13, 2009

    where is the thermostat

  • franko garman Feb 21, 2012

    change the thermostat es muy comun en overheat .amigo

  • Anonymous Mar 18, 2014

    How do i replace the coolant level sensor?

  • Anonymous Mar 30, 2014

    i am replacing the coolant reservoir and the level guard

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Finding the thermostat is easy. Just follow the top radiator hose back to the engine.
The question I have is how to get to the bottom screw of the thermostat housing.

Any Sugustions anyone?

Posted on Aug 08, 2008

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The t-stat is under the timing cover below the cam gears there is a housing that also has the coolant temp sensor attatched.over heating also ruins the temp sensor and the temp gauge wont work.
I have replaced the t-stat, temp sensor on a 99 s80 t6 and it still overheats.I also replaced the head gasket and had head check and it was warped but no cracks but still overheats and needs another temp sensor.when i find the cause i'll post it.

Posted on Oct 01, 2009

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Boiling coolant in the resevoir is a sign of blown head gasket

Posted on May 17, 2009

  • Theo Berendsen Apr 18, 2011

    That is not perse true, It can also mean e defect causing the Fan not to cool down the radiator when te engine is trying to loose its accumulated heat via natural flow of the liquid. If the Radiator is not cooled, the heat of the engine will cause the liquid to boil and being spit-back into the expansion-vessel.

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