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Engine overheating need help

Discussion in '4 Cylinder' started by kjp535i, Aug 11, 2010.

  1. Aug 11, 2010 at 6:08 AM
    #1
    kjp535i

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    kjp535i [OP] Member

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    my truck is overheating, not all the way but way above normal. doesn't overheat immediatly, but after about 15 min will start to rise a little. seems to go down with acceleration though, but will start to go back up eventually. I'm pretty sure it is either the radiator or fan clutch. don't really have the money to be wrong. anyone no a sure fire way to tell which one it is?
     
    kjp535i, Aug 11, 2010
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  2. Aug 11, 2010 at 6:11 AM
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    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Simple and cheap stuff first.
    Take the thermostat out and put it boiling water. If it doesn't open, it's bad.
    Make sure your fluid level is correct.
     
    98tacoma27, Aug 11, 2010
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  3. Aug 11, 2010 at 6:13 AM
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    kjp535i

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    kjp535i [OP] Member

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    ruled out that already.
     
    kjp535i, Aug 11, 2010
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  4. Aug 11, 2010 at 6:14 AM
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    kjp535i

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    kjp535i [OP] Member

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    all fluids good and everything. Also, i can turn the heater on and make the temp drop as well
     
    kjp535i, Aug 11, 2010
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  5. Aug 11, 2010 at 6:15 AM
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    98tacoma27

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    Some stuff. Not a lot, just some.
    I would think the fan clutch is the culprit then.
     
    98tacoma27, Aug 11, 2010
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  6. Aug 11, 2010 at 6:17 AM
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    kjp535i

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    kjp535i [OP] Member

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    Thats what i'm leaning towards... just hope i'm right... thanks man
     
    kjp535i, Aug 11, 2010
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  7. Aug 11, 2010 at 7:44 AM
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    kjp535i

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    kjp535i [OP] Member

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    Although, at normal operating temp. i'm able to have the radiator cap off. Doesn't seem to be much movement in the water..should there be?
     
    kjp535i, Aug 11, 2010
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  8. Aug 11, 2010 at 7:45 AM
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    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    No, there shouldn't be. If it were churning or spewing out, it would be a sign of a bad head gasket.
     
    98tacoma27, Aug 11, 2010
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  9. Aug 11, 2010 at 7:51 AM
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    kjp535i

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    kjp535i [OP] Member

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    I thought you werent supposed to be able to take the cap off while hot? Mercy i'm so confused LOL
     
    kjp535i, Aug 11, 2010
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  10. Aug 11, 2010 at 7:53 AM
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    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Technically no, but for different reasons.

    Safety, steam flash or a flash boil could occur.
     
    98tacoma27, Aug 11, 2010
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  11. Aug 11, 2010 at 7:56 AM
    #11
    kjp535i

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    kjp535i [OP] Member

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    That makes since!!... So now I'm back to sqare one. I did do the fan test. When i first started the truck i could stop the fan with my hand. After it got to operating temp, i could not.
     
    kjp535i, Aug 11, 2010
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  12. Aug 11, 2010 at 7:59 AM
    #12
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Have you tried flushing the radiator? They make cheap in line kits you can get at any auto parts store. What color is you fluid?
     
    98tacoma27, Aug 11, 2010
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  13. Aug 11, 2010 at 8:10 AM
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    kjp535i

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    kjp535i [OP] Member

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    yeah i have flushed it a while back and when i did it was pretty dirty, but appears to be clean now
     
    kjp535i, Aug 11, 2010
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