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760 turbo-thermostat question 700

posted by  volvosfive on  Sun Jan 23 04:31 CST 2005
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last visit: Sun Aug 21 08:01 CST 2011
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Hi All,

Is there anyway that I can put a hotter thermostat in my '84 760 Turbo. My temp gauge only goes to the 1/4 mark. I replaced the thermostat with an OE one from the dealer and it still does the same thing. I was just wondering if there's a higher temp thermostat available.

Thanks,
Dave








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    760 turbo-thermostat question 700

    posted by  someone claiming to be Charles on  Sun Jan 23 16:19 CST 2005 [RELATED]

    Hi Dave.
    Check to see if the cooling fan (run by the water pump)is blowing air all the time.Start the engine and feel by your hand on top of the valve cover for lot of air (BE CAREFUL OF THE RUNNING FAN). It could be the fan clutch is seized in some way resulting in too much air being blown.Did the engine use to get hotter before you put a new thermostat?.
    Good luck and keep us posted.








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      760 turbo-thermostat question 700

      posted by  volvosfive on  Sun Jan 23 17:11 CST 2005
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      Hi Charles,

      When the cooling fan is engaged, doesn't the engine make more noise? I thought it was supposed to make a whooshing sound when the clutch was engaged and quiet down when it disengaged. I'll double check though as it does sound like the fan is running all of the time. Before I changed the thermostat, it kept the same temp. It seems like most of my other Volvos usually run around the half way mark ( or just a bit below it).


      Thanks,
      Dave








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    760 turbo-thermostat question 700

    uid 30890's pic
    posted by  dnvolvo on  Sun Jan 23 05:03 CST 2005
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    According to the Haynes manual (82-91 740 & 760), there are two choices: One is called type 1 and the other type 2. Type 1 opens between 187-190F. Type 2 (which would be hotter) opens between 196-199F.

    It appears that IPD (www.ipdusa.com) sells both. Their catalog shows one for the 700 series that opens at 191F and one that opens at 197F.

    I would would probably also check the temperature sensor and temperature guage.

    dnvolvo
    '89 760T
    '91 240







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      760 turbo-thermostat question 700

      posted by  volvosfive on  Sun Jan 23 06:41 CST 2005
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      Thanks for the info on the thermostat. The temp sender and gauge have been replaced.








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        760 turbo-thermostat question 700

        posted by  Chris Regensburger on  Sun Jan 23 10:47 CST 2005
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        sounds like you may be dealing with something that a hotter t-stat will only mask.
        --
        cjregensurger@yahoo.com '86, '88 740 GLE; '88, 89 740 Turbo, '88 760 Ti








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          760 turbo-thermostat question 700

          posted by  volvosfive on  Sun Jan 23 13:28 CST 2005
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          What do you suggest that I check? Some engines just seem to run cooler.

          Thanks,
          Dave








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            760 turbo-thermostat question 700

            posted by  someone claiming to be Chris regensburger on  Mon Jan 24 07:21 CST 2005 [RELATED]

            Retarded ignition timing, internal coolant leakage, a bunch of things. Just do a general check of the FI and ignition systems. Also how is the engine mechanically?







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              760 turbo-thermostat question 700

              posted by  volvosfive on  Mon Jan 24 08:38 CST 2005
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              last visit: Sun Aug 21 08:01 CST 2011
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              I never have to add any coolant to it. My aunt bought this car new in '84. I got it in 2000 and we both always kept the service up to date. So, mechanically the engine is great. In my opinion, the B23 FT was the best engine that Volvo ever put in these cars. How do I check the timing? At idle with the transmission in neutral? What should the setting be?

              Thanks,
              Dave







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