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Cattle Boards
Trucks, Tractors & Machinery
Part replacement prior to engine swap
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<blockquote data-quote="chevytaHOE5674" data-source="post: 1846232" data-attributes="member: 19817"><p>First off have you verified coolant temp with an actual thermometer? Laser thermometer to the water neck and various parts of the engine? Also have you hooked a scanner up to see what coolant temp the pcm is reading? I'd suspect you will get a code like P0125 "Insufficient Coolant Temperature For Closed Loop Control" at some point. </p><p></p><p>Running too cool means that the thermostat is opening prematurely, or is bypassing somehow. The thermostat actually opens and closes steady while an engine is running to keep it at operating temp.</p><p></p><p>Have you used a pot of water to verify the thermostat is opening at the correct 190 degrees?</p><p></p><p>Is the thermostat and O-ring installed properly as to not allow coolant to bypass it?</p><p></p><p>Does the truck have an oil cooler? Are the hoses routed correctly as to not bypass the thermostat?</p></blockquote><p></p>
[QUOTE="chevytaHOE5674, post: 1846232, member: 19817"] First off have you verified coolant temp with an actual thermometer? Laser thermometer to the water neck and various parts of the engine? Also have you hooked a scanner up to see what coolant temp the pcm is reading? I'd suspect you will get a code like P0125 "Insufficient Coolant Temperature For Closed Loop Control" at some point. Running too cool means that the thermostat is opening prematurely, or is bypassing somehow. The thermostat actually opens and closes steady while an engine is running to keep it at operating temp. Have you used a pot of water to verify the thermostat is opening at the correct 190 degrees? Is the thermostat and O-ring installed properly as to not allow coolant to bypass it? Does the truck have an oil cooler? Are the hoses routed correctly as to not bypass the thermostat? [/QUOTE]
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Part replacement prior to engine swap
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