Question about 1993 Jeep Grand Cherokee

2 Answers

Antifreeze is leaking out of rariator cap

How to check if water pu,p is operating properly???

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  • lawanderson Mar 01, 2009

    no engine overheating, idiot gauges for temp(does not show red like when overheaating) no steam from tailpipe, in lookinf in radiator filler , fluid does not seem to circulate, but builds up and overflows with cap odd.

  • lawanderson Mar 01, 2009

    radiator has regular screw on cap, will buy new cap after I try what you have suggested. thank you

  • lawanderson Mar 01, 2009

    Looks like the pump is okay, sucks down fluid when I race engine with cap off, Im going to buy new cap, will let you know if that fixes my problem.. Thanks A Lot

  • lawanderson Mar 01, 2009

    Have plastic fill neck with screw on cap

  • lawanderson Mar 01, 2009

    Thanx. Bought new cap, seems fine

  • Richard Scordino May 11, 2010

    What is the engine temp when fluid is leaking from cap? Has vehicle overheated recently?
    Did you try a different cap to see if the cap seal is any good? Is engine running correctly (no missing or excessive steam from tail pipe or interior heating issues?) (notice I did not mention pump...least suspect in this)


  • Mike Butler
    Mike Butler May 11, 2010

    What problem precipitated the question?

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  • Jeep Master
  • 6,982 Answers

Don't forget to check the cap to make sure it's good before doing anything. If it wasn't overheating, a cap that is not properly sealing will leak. Do you have a plastic fill neck on your radiator or do you have a plastic tank that has a screw on type cap?

Posted on Mar 01, 2009

  • Richard Scordino Mar 01, 2009

    Screw on type cap is only found on an "expansion tank" If on radiator, it is a half turn, tab type which is more prone to seepage.I'm going 10-7 on this ... the motor guy can finish up if you need any more help!
    good luck


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  • Jeep Master
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Run engine from cool with cap off, heater (not defrost) on and top up coolant about an inch or 2 from top of rad, and watch as engine gets up to normal operating temperature. When it reaches thermostat temp approx.195 F the flow in rad should increase, then rad fan should eventually come on, and run shortly then shut off. Let this happen 3-4 times, and add coolant as needed. Then put rad cap back on & top up bottle to proper level. Try it and see what happens, and let us know.

Posted on Mar 01, 2009

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c...

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