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You can and it will run fine. You will be committing a federal crime that has severe legal consequences Jail and fines can be $10.000
NO,never good to run any car without a thermostat will ruin your engine
Vehicle will run without a thermostat - however will not run as efficiently and will have not heat
Yes, a catalytic converter can make it run hot if it is plugged.
YesYes
yes
absolutely
No you cant it would not work with out it.... sorry
It would, but it is not a good idea.
A thermostat is used to keep the engine set at a specific temperature. A Honda Accord can run without one in specific environments where the weather is normally hot.
An Accord will run without a thermostat. But, it will not operate properly. The heat, fuel/air mixture, even the mileage depend on the thermostat keeping the engine in the correct temperature range.
what model,year,size motor is the caddy you are talking about? I can't give you a competent answer w/o this info. General things to ck. are: thermostat, rad. fluid level(DO NOT CK. WHEN HOT!),Rad. blockage. Other than that, I need more info. Tony Its a 1996 Cadillac SLS Northstar