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Over heat?

This is a discussion on Over heat? within the General Help forums, part of the LSx Technical Help Section category; My low coolant lamp has been on for a while now and today you could hear it boiling and fluid ...

  1. #1
    Junior Member Agent421's Avatar
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    Over heat?

    My low coolant lamp has been on for a while now and today you could hear it boiling and fluid was pouring out of my overflow. any ideas?

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by Agent421 View Post
    My low coolant lamp has been on for a while now and today you could hear it boiling and fluid was pouring out of my overflow. any ideas?
    Check the black rubber pipe running from your radiator to the thermostat housing once the vehicle is hot. You should be able to feel the flow and you should be able to squish it once the thermostat opens. This will tell you if you have a faulty thermostat (be careful, it will be hot). The only other thing I can think of is your H2O pump went bad, or your cooling fans are not turning on.

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    Life in the Fast lane sunsetorangess's Avatar
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    Bad Rad cap, top off your fluid and replace the cap.
    J
    2001 SS, Its not the car its the Driver that matters....

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    Junior Member Agent421's Avatar
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    Thnx guys....after some trial and error I found that my fans arent comeing on... Anyone know where I should start?

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    Smiles for 9.5 Years cammed goat's Avatar
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    Fan relays goin out on ya? I think the relays are under the hood.

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    Life in the Fast lane sunsetorangess's Avatar
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    How did ya test the fans? if you turn the a/c on max the fans should come on. But like said above check your relay's and fuses..
    J

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    Your dash temp gauge is an estimation at best... plug in a scanner or use a laser temperature gun on the car ASAP to check what the engine is actually running at. Stock fans don't kick until 212 or so for one and 224 for two -- if I recall. Turning on the AC should also activate the fans. As posted, be sure to check your cap and also your hose temps to ensure that the thermostat is opening. It is not uncommon for the sensor in the overflow bottle to malfunction.

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    Moderator Cutlass's Avatar
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    ^^^Its actually worse then that. It 226 for one and 234 for the other.

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    Quote Originally Posted by Cutlass View Post
    ^^^Its actually worse then that. It 226 for one and 234 for the other.

    Wow. That is getting up there. Did they run the LT motors that hot too, or just the LS?

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    Moderator Cutlass's Avatar
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    yes, I just looked it up and its the exact same temp settings for a 97 LT1

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    Junior Member Agent421's Avatar
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    rechecked my fan....It works!.... Just bought a new thermostat, gonna put it on tomorrow..... Ill let you guys know something...I dont think thats it though....Felt of the hose and felt it flowing but you never know

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    Junior Member Agent421's Avatar
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    Put on new thermostat and still getting the same problem...... Man its driving me crazy

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    Did you replace the radiator cap yet?

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    Moderator Cutlass's Avatar
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    air in the system??

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    Junior Member Agent421's Avatar
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    Nah I havent replaced the radiator cap yet but I dont see how that would help?....Im pretty sure there isnt air in the system because after the install I took the lid off and started it up, let it warm up and then added more fluid and capped it back off....Its really tripping me out

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by Agent421 View Post
    Nah I havent replaced the radiator cap yet but I dont see how that would help?....Im pretty sure there isnt air in the system because after the install I took the lid off and started it up, let it warm up and then added more fluid and capped it back off....Its really tripping me out
    The radiator cap controls pressure build up in the cooling system. If it's faulty, it could cause excess pressure not to release when it should which could cause the engine to overheat.

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    Single Malt rbob93's Avatar
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    Faulty radiator cap will not allow correct pressure to build.
    A pressurized system raises the boiling point of the coolant.
    No pressure = Low boiling point = overheat or boilover as described in first post.

    Low coolant lamp = possible faulty or dirty sensor

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