Question about 1997 Pontiac Grand Am

2 Answers

Replaced the heater core. now i cant get good heat

1997 pontiac grand am. the heater core started leaking last summer so i disconnected the hoses and joined them with a coupler to get me by til it got cold.now after putting in a new heatercore i only get luke warm heat if the engine is at normal operating temp and not moving.once i start driving it gradually blows colder and colder

Posted by on

  • Anonymous Feb 22, 2009

    REPLACED HEATER CORE AND ENGINE HEAT COMES OUT BUT BLOWS COLD ON FLOOR

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 123 Answers

When u put the heater core back either you mixed up the A/c controls with the heater control, or the gate that allows air across you heat ex. is not opening.
Feel the temperature of the water going in and out of the heat ex. (open the hood and feel down by the firewall where the pipes go thru)

If it isnt hot going in there is a valve problem not allowing water to circulate.
If both are hot, then the blower gate isnt opening or the A/c control is confused with the heater control. ( a bit unlikely)
Hope that helps

Posted on Jan 13, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 599 Answers

The heater control valve is likely crusted shut ...replace that and any hoses that where crimped for a long time to heater core and backflush system with heater open full...also be sure head units cables vacuum lines and electrical were not disturbed when you tore out heater core

Posted on Jan 13, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I determine why 2003 Pontiac Grand Prix blows no heat with step by step instructions?


The most common reason is the coolant is low.
Check coolant level when vehicle is cool.
If coolant is low start vehicle and fill radiator with coolant.
if coolant was needed high probability there is a leak
look at all cooling system hoses, thermostat housing, all over the engine to try and find leak and repair.

if coolant isnt low, make sure its not really dirty...reddish mud colored. If it is the radiator is probably clogged and needs to be flushed thoroughly..then refilled with coolant.

there will be two heater hoses coming out of firewall..they are connected to the heater core and one hose directs flow of coolant to the heater core, other hose directs flow away from heater core..start vehicle and run until engine is warm then feel each heater hose as close to the firewall as possible..if one hose is hot and other is cool..the heater core is clogged and will probably require replacement. also look in passenger floorboard if coolant is leaking there..heater core requires replacement.

if you check these things and find none of the issues, let me know, and I will tell you what to check next.
Good Luck with it and if you have any.question let me know

determine-2003-pontiac-grand-prix-blows-biytfhhwp3elwls5pebl5p3x-4-3.png


determine-2003-pontiac-grand-prix-blows-biytfhhwp3elwls5pebl5p3x-4-2.png


determine-2003-pontiac-grand-prix-blows-biytfhhwp3elwls5pebl5p3x-4-3_0.png

Sep 20, 2015 | Pontiac Cars & Trucks

1 Answer

Bypass heater core


jus us a piece of usually half inch copper pipe n disconnect BOTH hoses from heater core and hook them both on each end of copper pipe or whatever u can find that will fit ID of heater hoses...plastic pipe is good too for this...heater core leak?...a good radiator sealer will fix this usually but you must have the heat on full for the solution can travel through the heater core...itmight still leak for awhile n then stop...if not, put some more radiator sealer in...always use the powered aluminum sealer...

Nov 27, 2013 | 2001 Pontiac Grand Am SE

1 Answer

I have a l shaped house on my firewall as soon as i poor coolant in the overflow tank it runs out of this house


A hose on the firewall is usually a connection to the heater core behind the firewall (which provides cabin heat when the heater is on). If the hose is leaking, it's a simple and inexpensive procedure to replace it. If the leak is coming from BEHIND the firewall, the heater core probably has a leak and should be replaced.

Jul 06, 2011 | 1997 Pontiac Grand Am

1 Answer

I put coolant in radiator and I get a/c but my heat doesn't work. I think my heater hose was bypassed by the previous owner. How do I fix the problem?


You should be able to look down in between the motor and the firewall and see if the heater hoses are attached to the heater core. Most of the time when they are bypassed it is because the heater core has started to leak. Instead of replacing the heater core (not a fun or easy job) they just bypass it so they won't leak coolant. So, if it is bypassed your probably looking at replacing the heater core in order to get heat.

Nov 09, 2010 | 1995 Pontiac Grand Am

1 Answer

Either a leaking hose going to the heater coil or a bad heater coil. Water gets inside car on front floorboard.How do I replace heater coil?


To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks

Apr 28, 2010 | 1997 Pontiac Grand Am

1 Answer

I need instructions on how to replace a heater core in 1994 Grand am


Removal & Installation
  1. Disconnect the negative battery cable.
  2. Drain and recycle the engine coolant.
  3. Raise and safely support the front of the vehicle.
  4. If necessary, remove the rear lateral transaxle strut mount.
  5. Detach the drain tube, then disconnect the heater hoses from the core tubes.
  6. Carefully lower the vehicle.
  7. Remove the console if equipped.
  8. Unfasten and remove the sound insulators, console extensions and/or steering column filler, as required.
  9. On some models it may be necessary to remove the steering column opening filler.
  10. Remove the floor or console outlet ductwork and hoses.
  11. Remove the heater core access cover.
  12. Unfasten the heater core mounting clamps/bolts, then extract the heater core from the vehicle
To install:
  1. Install the heater core, then secure using the clamps/bolts.
  2. Fasten the heater core cover.
  3. Connect the outlet hoses and ducts.
  4. Install the sound insulators, console extensions and/or steering column filler.
  5. Raise and safely support the vehicle.
  6. Install the drain tube and connect the heater hoses to the core tubes.
  7. If removed, install the rear lateral transaxle strut mount, if removed.
  8. Carefully lower the vehicle.
  9. Connect the negative battery cable.
  10. Fill cooling system and check for leaks. Start the engine and allow to come to normal operating temperature. Recheck for leaks and check coolant level. Add if necessary.
If your good with tools, this should take about 3 hours to do from start to finish. Good luck and keep me posted.

Nov 04, 2009 | 1994 Pontiac Grand Am

2 Answers

Pontiac grand am 1994 water comes out overflow


First question: why was the heater core replaced. Was it leaking water inside the car? Or was it replaced due to no heat inside the car. If it was replaced due to no heat inside the car, the shop you had taken it to shouldn't have replaced the heater core until they conducted tests of why there was no heat even if the customer insists on replacing the heater core. The reason why I'm asking is there's a possibility of the head gasket was leaking causing the poor circulation of the water to the heater core. If so, you may have replaced the heater core for no reason and most likely cost you a bunch of money. I live by this rule in our shop: DON'T JUST THROW PARTS AT THE CAR! You 'll end up spending way more money than you needed to.

Feb 12, 2009 | 1994 Pontiac Grand Am

Not finding what you are looking for?
1997 Pontiac Grand Am Logo

318 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

60769 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...