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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Thermostat thread
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<blockquote data-quote="FORZDA 1" data-source="post: 1264977" data-attributes="member: 26637"><p>Yeah, I would never go lower than 180 on a street vehicle. I've seen 216-217 on my 2018 with relatively heavy load, but drops right back to 205-208 most of the time. The thermostat shouldn't be causing the max temps to go higher than 225 though. Especially if a different thermostat allows lower max temps. The crack and max open temps are set by the thermostat, but the max temp seen should not be a thermostat problem, but rather a pure cooling/coolant problem. I'm wondering if the OEM thermostat may have some inherent flow or temp sensing (design) problem. The newer thermostat designs are all fail-open rather than the older fail-closed versions...</p></blockquote><p></p>
[QUOTE="FORZDA 1, post: 1264977, member: 26637"] Yeah, I would never go lower than 180 on a street vehicle. I've seen 216-217 on my 2018 with relatively heavy load, but drops right back to 205-208 most of the time. The thermostat shouldn't be causing the max temps to go higher than 225 though. Especially if a different thermostat allows lower max temps. The crack and max open temps are set by the thermostat, but the max temp seen should not be a thermostat problem, but rather a pure cooling/coolant problem. I'm wondering if the OEM thermostat may have some inherent flow or temp sensing (design) problem. The newer thermostat designs are all fail-open rather than the older fail-closed versions... [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Thermostat thread
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