Have to keep refilliing system through the pressure gauge, once a week to top it up. its fed by mains water through a pressure gauge!

Do a system pressure test.there could be a leak in a hose or a seal.does it still want to overheat or weird changes in the temperature gauge ?

Oil pressure and oil level are two different creatures.

your oil gauge determines oil pressure while the oil can (red light on dash) indicates oil levels.

There are usually two different sensors but can gauge the same types of things. E.G. - If your oil is so low that your pressure gauge is affected this can cause engine failure. Thus--a good rule of thumb is to check your oil once a week as the oil pressure gauge and red oil can may not always work as intended.

I hope this helps!

guess, here in net bunny land.?
sure, that is coolant lose. the gauge can measure air temps
so goes goofy. all do with air there.
so find and fix that leak.
its a pressurized system 14psi, so any leaks will be very serious.

YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.

thermostat

low oil pressure,mainly its thin dirty oil, pump needs servicing/replacing,pressure release spring,weak

It sounds like you have air in the Cooling system and the bars leak permanent seal does not help. The sealer creates restrictions through out the water jackets and can cause the thermostat to stick. Replace the radiator cap and run the truck with the radiator cap on the first click and keep an eye on the over flow tank, refill the over flow as needed and make sure you have the heater on the highest setting to work out all the air in the system. Once all the air has worked it's way out of the system, then you can close the radiator cap to the second click to ensure full pressure is built up in your cooling system. Good luck and keep me posted.

sounds like you have some bubbles trapped in there somewhere. try bleeding the cooling system by letting the car idle with the radiator cap off. when the engine reaches operating temp the thermostat should open, and you should see a drop in coolant level. top it off, and wait to see if more air bubble come up, and repeat until you;re satisfied that there are no more air bubbles left.

sounds like you could have faulty gauges to meby check them out.... and yes its posible that its pluged

It could be an air leak. Check for bleed valves in the cooling system on top of the engine.

Old hoses could have collapsed internally. Replace radiator hoses.

Check connection to temperature sender- could be gauge.