Could be low on coolant or a sticky thermostat.
1990 Chevrolet Lumina temperature sender is located on the back side of the thermostat housing. The sender has a wire that goes to the temperature gauge.
When a fish keeps turning over on it's back, it usually means it is dying.
heres what i would do: i would set the cars temperature to 50 and take out the battery and then let it sit for about 2-5 minutes.
your oil pump or your gauge is going out
It is an electrical device that tells back the engine temperature to both the temperature gauge and (where fitted) the engine management system.
It is normal for a temperature gauge to go up a little bit until the thermostat opens up and the cooling fan comes on. As long as it is not going out of the normal temperature range it is fine.
If the temperature gauge needle doesn't go back to zero when the car is shut off, it is possible that the needle is sticking. A little WD-40 or electronic spray on the gauge might fix the problem. There could also be a problem with the MAP Sensor or a Radiator Pressure sensor in the engine.
Could be, sticky thermostat or low coolant level.
Bad groung and or bad sending unit.
that's normal
Keeps them in their desired place, prevents them from going back to how they were before braces.
on top of the engine in the back " not for beginings" the upper intake must be removed!