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1991 1500 suburban:under the heater antifreeze ...


Sent to Car Experts April 17, 2006 9:53 a.m.
1991 1500 suburban:under the heater antifreeze leaking.inside the cabin. what now? thanks. alan
air conditioned.,this is the front heater,as there is one in the back also.

Edited by Customer (name blocked for privacy) on April 17 2006 at 10:05am

Optional Information:
1991 GMC suburban 350

Already Tried:
nothing
Customer (name blocked for privacy)
Status: Closed   Value: $10   
Answer
April 17, 2006 10:09 a.m. (16 minutes and 0 seconds later) 		REPLIED Check Mark

If you have antifreeze leaking inside the vehicle there are only two possibilities. They are the hose clamps to the heater core are not tight and the antifreeze is following the core tubes inside or the heater core itself is leaking. More than likely you have a leaking core, but I have seen a couple of cases where tightening the hose clamps took care of the leak. Here are the instructions for replacing a heater core.

REMOVE OR DISCONNECT

  1. Battery ground cable.
  2. Drain the radiator.
  3. Heater hoses from the core tubes (148).
    • Plug the core tubes to prevent spillage.
  1. Instrument panel compartment and door.
  2. Center duct to the selector duct (200).
  3. Center lower and center upper ducts.
  4. Temperature door cable.
  5. Nuts from the three selector duct studs that project into the dash panel.
  6. Selector duct to dash panel screw (inside the vehicle).
  7. Selector duct assembly.
    • Pull rearward until the core tubes clear the dash panel.
    • Lower the selector assembly to reach the vacuum and electrical harness.
  1. Vacuum and electrical harness.
  2. Selector duct assembly.
  3. Core mounting strap screws.
  4. Core.

INSTALL OR CONNECT

  1. Core.
  2. Core mounting strap screws.
  3. Selector duct assembly.
  4. Vacuum and electrical harnesses.
  5. Selector duct assembly.
  6. Temperature door cable.
  7. Center lower and center upper ducts.
  8. Center duct to selector duct.
  9. Instrument panel bar and door.
  10. Heater hoses.
  11. Coolant to the radiator.
  12. Battery ground cable.

ADJUST

  • Temperature door cable.


__________________
I hope this helps. Please click the Accept button to close the question.
Pictureautodoc_2000  -- Auto Service Technician -- 98% Positive Feedback on 878 Car Accepts
ASE Master Tech w/ Advance Engine Performance
Reply to autodoc_2000
Sent April 17, 2006 10:19 a.m. (10 minutes and 23 seconds later)
Is there a picture of removing the dash and of the parts of the assembly. I alan
Customer (name blocked for privacy)
Reply to autodoc_2000
Sent April 17, 2006 10:28 a.m. (9 minutes and 25 seconds later)
hi auto doc, do you have any tips for taking off the dash, and a picture or tips on this job. I am a novice
I will pay you.
Customer (name blocked for privacy)
Answer
April 17, 2006 10:29 a.m. (56 seconds later) 		ACCEPTED Check Mark

You do not need to remove the dash per the intructions. You do need to remove the glove compartment. I do not have pictures of the removal procedures, but I do have parts blow ups to reference. Here they are.

Images available only to Customers.

Images available only to Customers.



__________________
I hope this helps. Please click the Accept button to close the question.

Pictureautodoc_2000  -- Auto Service Technician -- 98% Positive Feedback on 878 Car Accepts
ASE Master Tech w/ Advance Engine Performance

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