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Bad Thermostat S70 1998

posted by  vovonewb on  Sat Nov 1 02:02 CST 2003
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last visit: Sat Sep 3 23:29 CST 2011
[RELATED]

Fellas:
I've been Volvositting an S70 for my sis-in-law for about 6 months now. I drive it every once in a while just so it's driven and not sit in the garage. I've never paid attention to the temp during the summer. It was not overheating. Now that it's getting colder out there, I've noticed that the engine is not getting as hot as I think it should (or maybe I'm just so used to my 83 240 with its toasty heater). The scenario yesterday when I drove it: outside temp 37, driven for 5 miles at 35 mph and it got up to temp 5 graduations not counting the very bottom, got on the Interstate, outside temp still 37, cruised at 65-70 mph, temp got all the way down to 2 graduations. Is it safe to assume that the thermostat failed in the open position or is this normal for S70s? Thanks for any input.
Denny








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    Bad Thermostat S70 1998

    posted by  bucky2003 on  Thu Nov 6 03:53 CST 2003
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    My S70 runs cooler in the winter, but my dealership said this is normal. During warm weather the temp gauge is steady at the 3 o'clock position. During the winter the temp gauge will tend to run 2-3 graduations less than the 3 o'clock position. I'll have to check another dealership and, see if I get a different answer.








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    Bad Thermostat S70 1998

    posted by  someone claiming to be Ray N. on  Sun Nov 2 15:53 CST 2003 [RELATED]

    My 98's thermostat failed at about 62K miles. They often
    fail by 70K and some people replace them at the 70K mile
    service. Replacement is pretty easy. Steps for the
    do-it-yourselfer are at:

    http://www.volvospeed.com/Repair/thermect.htm








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    Bad Thermostat S70 1998

    posted by  jda2000 on  Sat Nov 1 14:56 CST 2003
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    last visit: Sun Jan 1 21:27 CST 2012
    [RELATED]

    sounds like a failed t-stat in the open position.
    Once the engine reaches its normal operating temp of 3'oclock it should stay there.
    --
    '88 240, '92 740, '98 v70 GLT John in Tampa Bay







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