Running a cooler thermostat on Rover V8 - Defender Source
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  #1  
Old September 20th, 2016, 03:48 PM
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Question Running a cooler thermostat on Rover V8

Anyone ever run a cooler thermostat (<88 deg C) on a Rover V8?
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Old September 20th, 2016, 04:13 PM
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Anyone ever run a cooler thermostat (<88 deg C) on a Rover V8?
If it's a 14CUX truck it's going to over fuel constantly trying to get it up to temp ...
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Old September 21st, 2016, 08:08 AM
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Originally Posted by Grover View Post
Anyone ever run a cooler thermostat (<88 deg C) on a Rover V8?
easier said than done, end results could be fouled plugs, continuous rich condition, damaged cats due to excess fueling, rough idle, continuous closed loop condition, higher fuel consumption, lack of low end power, washed piston rings, difficulty starting when hot..etc.
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Old September 21st, 2016, 08:58 AM
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I don't know if this is true--but I heard that the genuine part thermostat (and maybe UK thermostats) have their temperature for when they are open and parts like the Stant are when it starts to open. For instance, the 180 Stant says that it starts to open at 180 and fully open at 195F. Is that true of say the 88C (190F) "OEM" version? That it starts to open at 190 or is fully open at 190?
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Old September 21st, 2016, 10:49 AM
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Originally Posted by Davis View Post
I don't know if this is true--but I heard that the genuine part thermostat (and maybe UK thermostats) have their temperature for when they are open and parts like the Stant are when it starts to open. For instance, the 180 Stant says that it starts to open at 180 and fully open at 195F. Is that true of say the 88C (190F) "OEM" version? That it starts to open at 190 or is fully open at 190?
Years ago I experimented with a thermostat buy placing it in water and heating it up to a boil. The thermostat did not open gradually but popped open. Don't know if it acts the same under pressure.
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Old September 21st, 2016, 12:06 PM
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I run a Stant 45858 180 degree and get 15MPG on an engine with 134k mi. Doesn't seem to run rich.

Not sure how much cooler you had in mind.
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Old September 21st, 2016, 02:37 PM
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I too am running the 45858---seems fine.
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Old September 21st, 2016, 02:44 PM
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Originally Posted by LuisC View Post
Years ago I experimented with a thermostat buy placing it in water and heating it up to a boil. The thermostat did not open gradually but popped open. Don't know if it acts the same under pressure.
AFAIK, most normal thermostat simply open and close at one temperature.

Stant does make the Superstat, which is meant to control a bit better. I assume their regular thermostat just ope and close at a fixed temperature.
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