Why is my temperature gauge bouncing?
One common cause is a defective thermostat, a component that is inexpensive and easy to replace. Other causes of a fluctuating temperature gauge are a failing radiator fan, insufficient coolant level and a leaking cylinder head gasket. A failing radiator fan will be erratic.
How do I know if my thermostat is sticking?
Checking For the Signs of a Bad Thermostat Look to see if the coolant is swirling/flowing immediately — that means the thermostat’s stuck open. If the coolant doesn’t flow after 10 minutes or so and continues to be stagnant after the temperature gauge indicates it’s hot, the thermostat’s likely stuck closed.
What should the coolant temp be on my Chevy?
I though the thermostat might be broken, so I replaced it with a 180 (was a 195). Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas?
Why does my coolant go from 180 to 210?
Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas? New engine, new radiator, new theromstat, new temp sender…what could it be? Have you bled the air out of the system? That sounds like it might be the problem.
What should I do if my coolant temp keeps fluctuating?
It’s pretty common for the temp to fluctuate this much, certain locations for the temp sender are more sensitive than others. If you are worried about air trapped in the block, drill a couple 1/8 inch holes in the perimeter of the thermostat flange. This will drain any air pockets in the block within a week or so.
Why does my car’s temperature gauge keep fluctuating?
The radiator could be plugged, could have plugged cooling passageways, could have a defective water pump, loose belt issue, collapsed hose, excessive load on the engine due to dragging brakes, underinflated tires, and so forth.