We are going to need to know which gasket you speak of, there are several.
From 185 to 265 degrees Fahrenheit.
A pressure test on the cylinders will tell if you have a bad head gasket. If you hear a whistle sound near the intake gasket, spray WD-40 (or any type of petroleum spray) on the area and if there is a leak the engine rpms (or engine sound) should change.
on a ford, the temperature sensor is usually found screwed into the Neck of the water inlet for the Upper hose where it mounts to the engine. Should be somewhere near the front of the engine near the fan belt area on the top.
On a 1996 Ford Contour, the temperature sensor, also known as the engine coolant temperature (ECT) sensor, is typically located near the thermostat housing on the engine block. It is usually positioned on the cylinder head or engine block, making it accessible for monitoring the engine's coolant temperature. To locate it, check near the intake manifold or the top area of the engine, usually on the driver's side. Always consult the vehicle’s service manual for precise location details.
Under hood, center, front engine area, mounted on front top of engine near water outlet
Its on the engine near the thermostat
A exhaust manifold that is warped, cracked, or missing a gasket will make a sound like a engine miss. I usually look for soot near the suspected area to tell for sure.
One man drove his car for 2 weeks with a broken head gasket before he blew his engine. Another drove it for 3 weeks. A head gasket costs several dollars if you can change it yourself. A new engine over a thousand. One mechanic can change a head gasket in an hour for $ 100. Other mechanics are no where near as good and take longer. It may be more in your area. How long do you want to go and how much do you want to pay?
water in the oil , steam from engine near gasket surface, lossing coolant with no visible leak
In a 1991 Toyota Previa, the primary temperature sensor, often referred to as the coolant temperature sensor, is located near the engine block, typically on the cylinder head or near the thermostat housing. There may also be an additional temperature sensor for the engine management system, which is usually in the same area. For the interior climate control, the temperature sensor is located in the dashboard, monitoring cabin temperature. Always refer to the vehicle's service manual for exact locations and specifications.
The temperature sending unit on a 1982 Toyota Supra is typically located on the engine block, near the thermostat housing. It is usually found on the driver's side of the engine, near the cylinder head. This unit sends temperature readings to the gauge on the dashboard, helping monitor the engine's operating temperature.
I just had my intake gasket changed on my 99 Monte Carlo for the same thing. My cousin is a mechanic and has changed the same gasket on several cars with the 3.1 engine. The gasket is about $60 - $75 plus labor.