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Old 10-22-2006, 07:11 PM   #1
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Default Heater Core installation?

Hey guys,

I'm new here and joined for two reason. The first being my 94 Bonneville has been a great car (164,000 miles) and I would really like to fix her up. The second would be how to install a heater core. I'm in a spot right now that I can not go out and buy a manual for the job and I have had no luck searching the net for help.

So I ask all of you Bonneville folks for help. Pictures would be great or even a detailed description. A very big thankyou in advance!
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Old 10-22-2006, 07:25 PM   #2
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http://www.bonnevilleclub.com/forum/...ic.php?t=64709

Well, this was posted in the 2000+ section
Your results and parts may vary. Check with your doctor before you attempt this procedure.

Heater Core Replacement (W/O D55)

Tools Required
J 38185 Spring Hose Clamp Pliers

Removal Procedure
Drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.



Position the J 38185 in order to remove the heater hose clamps.
Remove the heater hoses from the heater core.
Remove the left side sound insulator. Refer to Closeout/Insulator Panel Replacement - Left in Instrument Panel, Gages and Console.
Remove the right side sound insulator. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gages and Console.
Remove the IP lower trim plate. Refer to Instrument Panel (I/P) Trim Panel Replacement - Lower in Instrument Panel, Gages and Console.



Remove the air distributor duct screws (1, 2). Due to the difficulty in the removal of the right side screw (2), it will not be necessary to install upon reassembly.
Remove the air distributor duct.



Remove the heater core heat shield screws.
Remove the heater core heat shield.
Remove the heater core cover screws (1).
Remove the heater core cover.
Remove the retaining screw and strap from the heater core.
Remove the heater core.
Installation Procedure
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the heater core into the HVAC module using the attaching straps and screws.

Tighten
Tighten the screw to 1.4 Nm (12 lb in).

Install the heater core cover.
Ensuring the seals at the front of dash are in the proper positions, install the heater core cover screws.

Tighten
Tighten the screws to 1.4 Nm (12 lb in).





Install the heater core heat shield and screws (1).

Tighten
Tighten the screws to 1.4 Nm (12 lb in).





Install the air distributor duct and the left screw (1). Ensure the right tab is seated properly.

Tighten
Tighten the screw to 1.4 Nm (12 lb in).

Install the IP lower trim plate. Refer to Instrument Panel (I/P) Trim Panel Replacement - Lower in Instrument Panel, Gages and Console.
Install the left side sound insulator. Refer to Closeout/Insulator Panel Replacement - Left in Instrument Panel, Gages and Console.
Install the right side sound insulator. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gages and Console.



Install the heater hoses and clamps using the J 38185 .
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.


Looks like a pretty easy one as far as heatercores go.
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Old 10-22-2006, 08:09 PM   #3
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Thankyou, I hope it will work for my 94. I very well could be wrong, but if I remember correctly there shouldn't be that much of a difference. I will post when I get the new heater core installed. I am hoping with in the next few days.
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Old 10-22-2006, 08:41 PM   #4
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My source only goes back to 1998, but this is the procedure for 98.

Heater Core Replacement
Removal Procedure

Tools Required
J 37097-A Hose Clamp Pliers

Drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.



Remove the heater hoses (2) from the heater core using the J 37097-A .
Remove the right sound insulator. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gauges and Console.
Remove the I/P compartment. Refer to Storage Compartment Replacement - Instrument Panel (I/P) in Instrument Panel, Gauges and Console.
Remove the temperature valve actuator. Refer to Temperature Actuator Replacement .
Remove the HVAC programmer (C6. Refer to Programmer Replacement



Remove the heater core cover retaining screws.
Remove the heater core cover.
Remove the heater core retaining screws.
Remove the heater core.
Installation Procedure
Install the heater core into the vehicle.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the attaching screws.

Tighten
Tighten the screws to 1.4 Nm (12 lb in).





Install the heater core cover.
Install the attaching screws.

Tighten
Tighten the screws to 1.4 Nm (12 lb in).

Install the HVAC programmer (C6. Refer to Programmer Replacement
Install the temperature valve actuator. Refer to Temperature Actuator Replacement .
Install the right sound insulator. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gauges and Console.
Install the I/P compartment. Refer to Storage Compartment Replacement - Instrument Panel (I/P) in Instrument Panel, Gauges and Console.



Install the heater hoses (2) to the heater core using the J 37097-A .
Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
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Old 10-22-2006, 09:37 PM   #5
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98 should be the same as the 94.

2000 will be the same in basic procedure only.

You will want to get the spring clamp tool from Sears as the hoses are behind the strut tower and nearly inaccessable any other way.
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Old 10-23-2006, 05:08 AM   #6
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Quote:
Originally Posted by BillBoost37
You will want to get the spring clamp tool from Sears as the hoses are behind the strut tower and nearly inaccessable any other way.
Now see, I wasen't looking forward to that. There always has to be that one part that makes you wish you took it to a shop.
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Old 10-23-2006, 08:09 AM   #7
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When I changed lower intake gaskets, I also did all the hoses.

These hoses weren't too bad. The spring clamp tool is about $40 and you will act like the proud owner of a great new invention...

No more fighting hose clamps.. it'* simply amazing.
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Old 10-23-2006, 09:00 AM   #8
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I'm an idiot, I have a few spring clamps.
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Old 10-23-2006, 09:31 AM   #9
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Quote:
Originally Posted by AFroedge
I'm an idiot, I have a few spring clamps.
Oh no.. you aren't. Wait til you see where they put them
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Old 10-23-2006, 11:49 AM   #10
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This may be a little late, but the information on this link might help you get the heater core cover off...

http://trialsnuts.com/ecc.pdf

Wade through the stuff that is not applicable to your task and find the information that is pertinant. Basically, all the stuff related to changing the air mix actuator would be of interest to you.
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