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Cooling System
FAQ's
ANSWER:
Yes, but it can cause more problems than the one you're trying to fix
if you have a newer vehicle. Before engine control systems came along it
was common to install a cooler thermostat in the summer and a hotter one
in the winter. It is no longer recommended to do this because today's
computerized engine control systems need a constant year-round operating
temperature.(189-197 degrees F. )
The engine computer controls emission, fuel and spark systems and it
requires a set temperature to do this. The coolant temperature sensor
sends information to the computer and this tells the computer how to set
ignition timing, fuel injector timing and pulse width, when to open the
EGR valve, purge the charcoal canister and many other things. Running the
engine to cool will cause poor fuel economy and drivability problems.
Under any circumstances it is not recommended to operate a vehicle without
a thermostat. This can cause thermal stress making the engine severely
overheat and can crack an engine block or cylinder head.
