Question about 1997 Chevrolet Tahoe

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*96 Chevy Tahoe

My 96 Chevy Tahoe is over heating. I have changed the water pump, thermostat, hoses, flushed the system, added coolant and even changed the radiator, and its still over heating. I can't seem to figure out what else it could be. Can anyone help? Is there something I am missing? PLEASE HELP..

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  • Master
  • 404 Answers

Hello,
After your exhaustive tasks I feel one of two things are left to rule out.
First, have you an air lock? did you bleed the cooling system after installation of parts? if not try parking on level ground, with engine cold not running remove coolant filler cap and top up if required to correct level.
Start the vehicle and leave to idle with cap off, have plenty of hot water available, when at operating temperature you may here gurgling and see bubbles in the cooling system Beware not to get too close as it will hopefully boil over, after it does top up with warm water and wait, keep blower on full and heat to max inside vehicle.
It may boil/bubble over a few times before settling if so top up and replace cap once settled.
Finally if an abundant amount of air bubbles are continually visible and regular bubbling over then unfortunately the cylinder head or gasket could be at fault.
I hope this points you in the correct area.
Please remember to politely rate this possible remedy!
Onyer~EDson(:0) {#><U.K.

Posted on Jan 21, 2009

  • 1 more comment 
  • t_page742
    t_page742 Jan 28, 2013

    Thanx Paul I will purge it after work and try it will let ya know.

  • t_page742
    t_page742 Jan 31, 2013

    Ok so did as you said and it did bubble on and off a few times took it for a ride and temp went back up so when I let it cool down I opened the clamp on the hose from eng. return at the connection that has Thermostat at water pump stamped on it air bubbled out and the coolant level dropped I added and burped it at the hose until coolant was coming out. took it for a ride all is good now no leaks not over heating and the heater works real good. Thanx Paul for putting me on the right track and just wanted to pass on the results. Seems like there should be a relief valve at this area of the hose fitting or higher up some where again thanx. Tony

  • Paul W
    Paul W Jan 31, 2013

    Hi Tony, So pleased your trusty Chev has been Burped. I know frustrating when the Gauge starts rising and always when on an important journey. I havn't been on FixYa for Years however this result has rekindled my interest, I reckon yours is the only personal & Genuine response received. Not a single penny have I taken or been given all for the Love of Motoring. Have a successful further 100,000 miles in a Truly respected Vehicle. Mines a 1996 Astro Safari Day Van converted myself to Lpg and about to take my Pooches for a run. Greetings from Across the Pond! (Uk) Paul 'W'

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