1985 model
You would need to know if the engine is actually running above 220 degrees, or if the gauge is faulty. You could run the engine with the thermostat out as a test, and also use an inferred thermometer to measure the actual engine temp and compare that to the gauge on the dash.
SOURCE: 1994 honda civic ex high temp gauge not overheating
MIGHT NEED TO FLUSH YOUR RADIATOR OUT OR HAVE A SHOP ROD IT OUT FOR YOU.DOES THE WATER IN THE RAD. LOOK NASTY LOOKING,IF SO FLUSH IT FIRST BEFORE YOU TAKE TO SHOP
SOURCE: 1990 honda accord temp gauge above hot limit.
Hi there,
Firstly - DO NOT run engine, when guage reads hot, as this will cause costly damage to head gasket & alloy engine head.
The fact that guage takes 1min to read HOT, would confirm the guage IS working properly.
So, other components which are likely to cause hot readings (in this order) are:
- lack of coolant (or leakage somewhere): is there sufficient green coolant at the correct level? Top up mixture to correct level. Repair any leaks.
- collapsed radiator hose: when engine is cold, start engine, then quickly watch both upper & lower radiator hoses to see if either begins to flex inwards (collapse). Replace if either hose is collapsed.
- bad/incorrect thermostat rating : when replacing thermostats, you must ensure it is of the SAME temp rating (they all differ).
- Incorrect Temp sensor rating: the ratings of this sensor must be within manufacturer's spec's.
- bad waterpump: the engine relies on the waterpump to distribute the coolant throughout the entire system. If waterpump is faulty, coolant will not flow quick enough, causing overheating.
If you still believe all of the above components are OK, then have your cooling system "pressure tested". This test should be done, before looking further at other electrical components.
Cheers,
"if this has helped you in any way, please rate this solution"
SOURCE: 1994 Lebaron Convertible No Heat, High Temp Gauge
The heat is made in the engine so if the engine is overheated and nothing else is hot, the water is not moving.
I would have suspected a thermostat also.
I would guess now that you have a dead water pump.
Karl at topgunwon.com
SOURCE: Temp gauge goes up and down
first i would purchase a new radiator cap 15 lbs 16 lb capacity cost about $7..then you must let car cool completely...now check radiator coolant level.. top off if it needs it. Now install new cap..let car warm up normally and after it get to normal temp range or higher put hand on upper radiator hose..it should feel hot and when you squeeze it you should feel a slight back pressure..this will mean that the thermostat and water pump are working correctly. if not either the thermostat you purchased is defective or your pump may not be working properly.
when you use just water in an engine the boiling point becomes 212 when you add the correct amount of antifreeze, depending on where you live, the boiling point will go up to 240 degrees. Make sure you put in the correct amount of mix.50/50 will usually work well. sometimes when a gauge does max out like that it could just be trapped air. if after you checked all this out and no air is trapped in the system, i would think that you may have a bad temp sensor. let me know if this helped thanks.
SOURCE: 2004 nissaan xterra v6 3.3L
Well , I know $800 is a big bill , but think of it this way , you got a bunch of new stuff on the car. The timing belt replacement alone would cost someone almost $800 to have done by a mechanic , and if it broke and destroyed your engine how much would that have cost. It's always nice to solve the problem on the first try , but at least it is fixed now , and you won't have to worry about any of that other stuff for a long time.
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