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2006 Ford Explorer Question: Reservoir for the radiator keeps emptying out below the full level. No leaks

 

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suedave, 4.0L V6, South Portland, ME, October 14, 2013, 17:13
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are evident. I did lose heat once. What could this possibly be?

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  • Answer #1

    G. T. Service Center (4231 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG October 14, 2013, 18:42
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    Have it pressure tested, and the cap tested.

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    suedave, October 16, 2013, 15:03
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    Thank you for your reply. Our mechanic said he did notice radiator fluid on the radiator and I think he said the engine too but he couldn't find a leak. He couldn't get a reading when he checked the pressure. I hope this makes sense.

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    ProfessorG, October 16, 2013, 15:29
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    No pressure drop? Might check with engine running to make sure as well, engine at operating temp. Suggested cap, might not hold rated pressure, coolant on radiator is a good sign, just want to be sure engine isn't building more pressure then rated capacity of cap pressure rating. Thanks for checking back.

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  • Answer #2

    October 15, 2013, 02:32
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    Steaming from exhaust or any misfire? Misfire on cold start after sitting overnight?

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    suedave, October 16, 2013, 15:07
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    No steaming from the exhaust or misfire. Sometimes the engine will rev on cold mornings but this isn't consistent at all. Someone suggested a leak in the radiator hose but we had our mechanic look at it and he couldn't find a leak.

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  • Answer #3

    Greg's Orange Auto (14224 Answers) , Orange, CA - (714) 361-9386
    globalhelper October 15, 2013, 06:12
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    pressure test system to determine source of leak if any then repl rad cap

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    suedave, October 16, 2013, 15:09
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    Thanks for your reply. We haven't tried a new radiator cap but maybe we should. Pressure check didn't show anything when our mechanic tried this.

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