Water will not leave engine to make heat

1984 OLDSMOBILE DELTA 88
350,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
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RICKNET
  • MEMBER
  • 2 POSTS
I have replaced heater core, water pump, thermostat, heater control value, bypass heater control value, and replaced radiator. Water does not leave engine. Help please
Dec 14, 2016 at 10:29 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
so you heater hoses are not getting hot? try a new radiator cap and if that does not work try pinching off upper radiator hose as there are no air bleeds on this car. then check for a vacuum leak the water valve must get vacuum in order to work. If this is auto temperature control where you set the temperature. get back to me because there is a certain way to do things on this for heat.
Dec 14, 2016 at 11:50 PM
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RICKNET
  • MEMBER
  • 2 POSTS
Thanks for advice, however, I have replaced radiator cap, replaced heater control switch on engine, taken vaccum line off and direct line to heater core from engine and have pitched water hose.
Dec 16, 2016 at 11:11 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if the water valve does not get vacuum you won't get much heat
Dec 16, 2016 at 11:41 PM
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