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vr overheating

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Rumbl, Apr 10, 2009.

  1. Rumbl

    Rumbl = ShAkE AnD bAkE =

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    hey guys i got a vr v6 i have overheating issue's.
    Ive changed the radiator,thermostat,all hoses,coolent,and switches and even bleed the system and when i drive the temp goe's up to full in the red then after about 1min the temp goe's back down to half way it doe's this about 2 times a day.
    What would this problem be water pump perhap's or just need to be bleed again?
     
  2. holdenrocks

    holdenrocks Member

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    could be water pump... check the pump or need to be replace... once if u replace the water pump .. will need to bleed the system again with fresh coolant.. hope will help u?
     
  3. hako

    hako Donating Member

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    From your description it sounds to me more likely your temp gauge is mis-reading. It shouldn't be the waterpump as it wouldn't apparently cool down again plus it is very rare for waterpumps to stop pumping (impeller needs to be completely corroded).
    Next time it goes to red, pop the bonnet and feel the top radiator hose and the radiator side tanks - unless they are very hot and you get a hot engine smell it will not bet overheating. Then make sure the connector that goes to the temp sensor is on properly and not damaged.
    Maybe also bleed the system and make sure the heater is on when you bleed.
    Good Luck
     
  4. mulligan-can

    mulligan-can ?!?

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    What this guy said. Seriously.

    I don't see it being anything other than a faulty gauge. Buy a calibrated temp gauge and install it if you really wanna be 100% sure.
     
  5. FstStig

    FstStig Diagnostician

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    Make sure you also check your Temp Sender. As it maybe sensoring it correctly but may not be sending the correct information to the Cooling System Gauge on your cluster.
     
  6. hako

    hako Donating Member

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    For less than $50 you can buy an infared thermometer that reads dead accurate in a split second and doesn't have to touch the measured surface - I've seen them at tricky dickies for about $29 and they are mighty handy for all sorts of things. I use mine for measuring the temperature of my beer.
     

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  7. Chirpstr

    Chirpstr A new project attack

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    Check the connector on the temp sender...(not too sure where abouts on the V8's.)
    If that seems ok revise your bleed technique.

    LOL at Hako too.
     
  8. ausrs

    ausrs New Member

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    new t stats have been known to fail many many times
    personally as my own safety i always drill 2X3 mm holes in them to provide at least some water flow if it fails
     

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