2011 4.0 litre thermostat question. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 12-28-2012
woo woo is offline
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Icon5 2011 4.0 litre thermostat question.

I monitor coolant temperature from the computer with a ScanGauge.

Warm up takes a long time, at least 15 minutes, and it struggles to hold 82C (180F), with ambient just above freezing.

In my 2007 4.0 litre Ranger I'm sure it warmed up quicker and easily held 88C (190F).

If anybody else is monitoring coolant temperature in a late model Ranger please tell me what you are seeing.

Does anybody have the specs of the OE thermostat, or temperature information from the shop manual?

Thanks.
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Old 01-02-2013
woo woo is offline
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Nobody has an answer?
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Old 01-02-2013
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my 01 stays right around 180-188 f
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Old 01-02-2013
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My 2011 is the same way right now -10 out and it will not get to operating temp just idling. But then I don't think begin double lift and no gap guards or anything covering the bumper gap hole doesn't help too.
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Old 01-02-2013
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My '07 4.0L used to always hold 190-192ish ... didn't seem to matter much what the temp was outside.
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Old 01-02-2013
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well stock thermo on my 02 is 194, thats also what it says on the actual thermo, prolly just need to replace it, its pretty easy.
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Old 01-03-2013
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I get mine up to operating temp within my 10 minute commute to work. Part way is 70kms/h and the other part is 100+kms/h. It easily holds @ 195 degrees when it gets there. I bet there is something wrong with your thermo. I use an ultra gauge for my monitoring needs and am 3 years older of a model.
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Old 01-03-2013
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I tried to get it replaced under warranty, but the tech writer wasn't interested, wanted it to throw a CEL, and mumbled something about 79C (174F).

Anybody with a shop manual know what are the conditions to throw a coolant low temperature CEL?

I know that for my other car that CEL involves both low temperature and time and repetition.
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Old 01-03-2013
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The coolant drain is on the bottom of the rad...
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