Question about 1998 Ford F150 Regular Cab

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Tempature gauge will rise after about 20 minutes then lower qickly to normal new thermastat,cap,heads,radiator,waterpump,tempsensor 1997 f150

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  • Richard Scordino May 11, 2010

    Since its not overheating (you didn't say it was) I would tend to believe that either the clutch fan or electric fan is coming in late, (you will need to verify by looking) It also could be that the thermostat is opening late but this is pretty rare for a new one.

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What about the temp sending unit that may be faulty or fan viscos copling

Posted on Jun 22, 2009

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I've been having overheating issues with my 95 f150 132k miles 5.0 automatic 4x4.I started replacing the coolant system components (burping until no bubbles for every part)with no improvement every...


Remove the thermostat temporarily just for a diagnostic strategy. Put the thermostat housing back on with a new gasket and then drive it for a time to confirm that it is no longer doing that same thing. You will be running too cool to leave the thermostat out and you will have little or no heat. I just want to know if removing the stat helps before I continue. let me know.

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Yesterday temp gauge began rising. Went to top. Stopped. Let it cool down. Repeated 4 times on 25 mile drive home. This morning put water in reservoir. Gauge rose quickly to normal & stayed. ...


Probably a cooling fan issue or maybe a stuck thermostat.. change thermostat and check that cooling fans engage..good luck...also when you fill up the resorvoir let it be for a while and check to see if level is down, sometimes it takes a while for water to seep into radiator, i assume you dont have a radiator cap?

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1995 mitsubishi Galant 2,4 v6 overheating replaced thermostat and flushed system fine for a while with some rise in temp at times now pressurising water out header tank and temp gauge does not move above...


a few things to check before we condemn it as a leaking head gasket(pressurising water out).
First check the radiator cap seal,no cracks and that it takes some pressure to push the spring loaded part down.
Does both the top and lower radiator hose get hot as temp gets to normal(where thermostat should be open).if not,the thermostat may be a faulty one or has slipped out of seat as the cover was bolted back down onto it.(temperature will differ either side of it).I have had some of these come in with part of the waterpump impellor rotted away.same symptom of one hot and one cold hose,and water doesnt flow inside radiator with cap off(ensure this is not removed if engine is hot)and temp where the thermo should be open.
Possibly the radiator needs sending out for the top or side tank to be removed and each tube cleaned out.this is a lot more effective than trying to reverse flush with water only.
But if temp is normal these areas should be fine.
Do the hoses swell with pressure and become hard to squeeze in a short time?this could reveal a leaking head gasket and should be tested with a teekay type tester for the presence of cylinder gases in cooling system.
Do the fan(s) come on if sitting idling at normal temp for 5-10mins?water can be pushed out if they dont come on or their cut in/out temp is incorrect.hope this helps.
let me know some times re when it pushes water out,do you hear a boiling sound from inside engine or radiator when this happens,any other info that may help diagnose.

Feb 17, 2011 | 1995 Mitsubishi Galant

1 Answer

After a cold start, I don't get cabin heat for about 15 minutes. The heat gauge starts at C (cold), rises to normal operating temperature, then rises to just under the H (hot) for about 30 seconds, at...


Check for low coolant, you might also have a sticking thermostat. Alot of fords get air pockets, make sure if it needs coolant to let it run for about 10-15 min with the radiator cap off.

Oct 15, 2010 | 2003 Ford F150 Regular Cab

2 Answers

Replaced thermostat on 1997 altima but temp still rises after a few minutes. Have to keep heater on to lower temp. Sometimes temp will rise on an incline.


could be a head gasket that is your problem,are you using half antifreeze and half water ?take radiator cap off and smel. the fluid while you let engine warm up if you smell gas or exhaust type gases then its going to be a head gasket that is bad ..l

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The radiator keeps boiing, even after a short trip and the car tends to overheat, also have had to replace 2 engine coils in the last few weeks. Actually a suzuki crescent cultus.


Hmm, open the radiator cap and check if the coolant is calm if it is vibrating or tends to jump out the head gasket needs replacement

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2 Answers

Car over heating. tempature gauge fluxuates


Your overheating problems can have several possible causes.
1) Airlock in heating system - solution - bleed air from cooling system. Method is dependent on make/model of vehicle
2) Radiator blocked - solution - drain and flush radiator
3) Failed waterpump - solution - fit new waterpump
4) Engine thermostat stuck in closed position - solution - fit new thermostat
5) Electric cooling fan (if fitted) failing to operate - solution - check fan, fan operating switch, all wiring and connectors
6) Not enough coolant in system - solution - check and top up to required level. Also check all hoses for sign of leakage.
7) Faulty temperature gauge giving incorrect reading

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1 Answer

Overheating


weak rad cap, or in this case a expansion tank cap. all else sounds normal. Or it has a head gasket leak. Need to pressure test the cap and cooling system.

May 04, 2009 | 1997 Cadillac DeVille

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