Does the thermostat stay open until the engine warms up?
As the engine warms up closer to the operating temperature, the thermostat gradually opens up, allowing coolant flow through the radiator. In cold weather, if the engine temperature drops close to the lower limit of the operating range (194°F or 90°C), the thermostat closes again.
Will temp gauge work if thermostat is bad?
The first and potentially most alarming symptom will be the temperature gauge reading high into the red within the first 15 minutes of your vehicle engine running. This is often the very first sign that the thermostat is not functioning properly.
What is the normal operating temperature for a big block Chevy?
If the engine is creeping too much above the 190-200 degree range, it’s probably running hot. Personally I like to see it in the 185 to 190 range. In some cases short instances of higher temp is not going to damage the engine but prolonged overheating can do serious damage.
How hot should a big block Chevy run?
Steve I have a 69 big block it runs between 190 and 210 most of the time. The owners manual says 210 is normal. On hot days 90 degrees or hotter my car would go to 220 or 230.
What kind of thermostat does a 454 engine use?
I believe a lot of 454 engine originally came with the 195 thermostat. I bought a new 454 – 450 LS-6 crate engine in 1970 but I forget which thermostat it came with. I ran a 180 in mine …
Why is my GM 454 thermostat overheating in traffic?
Looking from here, if your overheating is happening in traffic it may be caused by the vacuum advance unit being sourced to ported vacuum. It should be sourced to manifold vacuum. Reason being, it takes time to burn the lean idle mixture and GM engines require quite a bit of additional advance at idle.
What does a 195 thermostat do for a car?
The 195, in certain situations, holds the coolant in the radiator longer and allows the radiator to cool the coolant down before it leaves the radiator to return to the engine. I had a 1970 LS – 6 Chevelle also, and it originally came with a LARGE 7 blade clutch fan. Mine also had a 4 core radiator from the factory.
