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  #1  
Old 11-18-2015, 12:45 PM
ngoma ngoma is offline
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Default Failed Thermostat

Symptoms: At start of winter noticed delayed engine warmup. Engine really struggled to reach operating temp. Upper radiator hose was warm long before thermostat should have opened.
P1010845.jpg

Thermostat last checked 2.5 years / 23,000 miles ago, looked fine.
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  #2  
Old 10-12-2017, 09:17 AM
RedArrow RedArrow is offline
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The next project!

Is it suggested to switch to an 80C thermostat for health of headgasket?
87 is factory specifications...
Idk.
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  #3  
Old 10-12-2017, 12:24 PM
ngoma ngoma is offline
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The lower temp tstat is more to help control summertime overheating episodes. Theory is the lower temp tstat opens earlier during temp rise to help the (borderline sufficient capacity) radiator get a running start to keep rising temps from running away beyond control.

Roundabout you could call it a head gasket saver. More of an aluminum head saver.
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Old 10-13-2017, 05:07 AM
v8volvo v8volvo is offline
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I haven't been able to see any noticeable impact on MPG or engine health even running the cooler tstat year round. Far from a scientific conclusion but at least it appears not to hurt. It seems like it makes temperatures more stable overall regardless of ambient temp.
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Old 10-13-2017, 11:11 AM
RedArrow RedArrow is offline
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Thank you for your comments.
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