Water will not leave engine to make heat

Tiny
RICKNET
  • MEMBER
  • 1984 OLDSMOBILE DELTA 88
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 350,000 MILES
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
Thursday, December 15th, 2016 AT 6:29 AM

3 Replies

Tiny
HMAC300
  • 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.
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Thursday, December 15th, 2016 AT 7:50 AM
Tiny
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.
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Saturday, December 17th, 2016 AT 7:11 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the water valve does not get vacuum you won't get much heat
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Saturday, December 17th, 2016 AT 7:41 AM

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