Question about 1998 Ford Explorer

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Bad lifter it all started when my truck would start over heating the top of the radiator was getting wet somehow but there where no holes in radiator or hoses so we replaced the cap because it would read hot but the motor was not but my water kept disappearing and my gauge was constantly going up and dow, now we replaced the thermostat and it overheats ocassionally but now it has a really loud knocking coming from the motor every time its started until the motor heats up. is my motor damaged from all the over heating?

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Sounds like a blown head gasket

Posted on May 18, 2017

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6ya6ya
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Posted on Jan 02, 2017

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motor1258
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SOURCE: ford ranger truck overheating

You did let it run quite a while with heater on full while refilling the coolant to make sure all air bled out right? Well try it again with cap off, and rev the engine slightly once in a while for a few seconds, then let it idle again. Keep doing this as long as your gauge stays in normal range, Until you can see the flow increase in the rad, about 2 or 3 times at least. You'll see it flow faster when the thermostat opens. while watching it, keep an eye for bigger size bubbles, which indicates air obviously, but they should disappear or at least get very minimal after a while. Continuous larger bubbles, may indicate a bad head gasket, or cracked/warped head, or both. Let's not go there until we try the other though. Feel your rad hoses too, (squeeze them) especially your lower one, as it could be soft & spongy, and collapsing during driving & restricting the flow to the engine. If it feels weak at all, after all you've done, I'd do them too just to be sure, if they feel weak at all. Keep us posted

Posted on Dec 21, 2008

chuck943
  • 783 Answers

SOURCE: Have a 2003 ford f150 crew cab truck will start to

Problem is most likely the water pump.Have seen several of these doing this on the 5.4L. Impeller fins were damaged on the ones that I have seen.

Posted on Feb 20, 2009

dennymulford
  • 1055 Answers

SOURCE: Cooling system in my 1993 Ford Explorer over heats

change the water pump and check for a blockage in the waterjacket

Posted on Mar 09, 2009

  • 221 Answers

SOURCE: Over heating

Check to see if your water pump is leaking radiator fluid through the weep holes, or maybe a wore out drive belt. good luck.

Posted on Mar 09, 2009

  • 7353 Answers

SOURCE: 2003 f-150 I get no

you may have a head gasket problem, anytime coolant comes out of the cap, theres too much pressure in the cooling system. you dont say how long it takes to do that, but a head gasket would do it right away. 1 minute or so. if the truck is hot, make sure the air going through the radiator is HOT.

Posted on Jan 04, 2011

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LOW COOLANT LIGHT COMES ON SOMETIMES AND TEMP GUAGE SHOWS ENGINE GOING TO OVERHEAT. HEATER GETS COLD. IS IT THE THERMOSTAT?


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Hit me up after u have check on these.

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1 Answer

Over heating


Check to see if your water pump is leaking radiator fluid through the weep holes, or maybe a wore out drive belt. good luck.

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