possible overheating issue updated - Page 3
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  1. #21
    Administrator Darren West's Avatar
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    Quote Originally Posted by paul67 View Post
    What colour is the rad as painting it black does make it run cooler
    its alloy colour

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  3. #22
    Administrator Darren West's Avatar
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    ok so at what temp should i set the fan to kick in at please
    ive removed the thermostat centre (not a permanent thing)
    ive bolted the mechanical fan on
    ill fire the truck up later on to see if it makes any difference

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    Official RnS Addict beach57's Avatar
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    Removing the center will make it run hotter, it causes cavitation air in the water ,just drill small hole in the side of therm try youtubeing it ,check there is no space around the rad so the air can by pass it,also the fans are going the right way .

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  6. #24
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    neil still building it is offline
    and assuming its the correct waterpump not spinning back to front - ie the difference often between v pulley and flat belt later driven pumps some contra rotate...
    .i'm not saying thats the problem but among other things to test/check
    neil

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    I'm Not Jed Clampett stueeee's Avatar
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    Quote Originally Posted by Darren West View Post

    where should the temp sensor be located
    You have two options if you are using factory heads, towards the front of the head on the left side, and towards the rear on the right side there is a 1/2 NPT threaded hole in the head above the exhaust manifold, this is where the factory put the sensor.

    Quote Originally Posted by Darren West View Post
    ok so at what temp should i set the fan to kick in at please
    ive removed the thermostat centre (not a permanent thing)
    ive bolted the mechanical fan on
    ill fire the truck up later on to see if it makes any difference
    If you have the thermostaitc switch in the top hose, I'd set it at 95 degrees provided that your electric fan knocks the temperature back reasonably quickly.
    Stuart.
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  8. #26
    I'm Not Jed Clampett stueeee's Avatar
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    Quote Originally Posted by paul67 View Post
    Removing the center will make it run hotter, it causes cavitation air in the water ,just drill small hole in the side of therm try youtubeing it ,check there is no space around the rad so the air can by pass it,also the fans are going the right way .
    Removing the thermostat would certainly not help cooling, but cutting out the centre simply mimics the "thermostat restrictor plates" sold by some tuning places, they have pretty much the appearance of a thermostat with the centre cut out which manages the flow so avoiding the coolant boiling in the rear of the motor while the front overcools.

    Worth drilling a bypass hole in the thermostat if it doesn't come with one, even though it slows the engine warm up slightly.
    Stuart.
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  9. #27
    Administrator Darren West's Avatar
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    ok well I've just come in from a run up with the truck
    so i have moved the fan so it now sits straight on the rad
    I've took the centre out of the stat (just to prove its not getting stuck)
    and its better but the fan can't cool the motor as the temp still creeps up slowly with the fan running

    im stuck to be honest it appears that the rad cap opens up at 110 degrees as this is when i see steam but also it could be due to the pressure in the rad/hoses

    I'm really in 2 minds

  10. #28
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    neil still building it is offline
    if you run it when its cooler...can you leave the cap off and see any water flow to confirm the pumps is circulating properly..?
    with no guts in the stat it should be flowing really easilly....maybe now even flowing too fast for the rad to cool it....
    trouble is its running way hotter than it should be too quickly too...
    Last edited by neil still building it; 20-04-2014 at 12:28.

  11. #29
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    nobody is offline
    have you got a heater hooked up
    Rod/custom/drag build profiles:
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  12. #30
    Administrator Darren West's Avatar
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    no heater
    the water seems to enter the rad through the top hose ?

    guys thank you so much for taking your time to help

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