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Heater core, I have a v6 3800 Do I have to take the dash out? there looks like a door on the firewall.... can I get to it thru there if I remove the other parts that seem to be in the way......

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: heater core on 2005 Silverado

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008f2d5

Posted on Dec 11, 2008

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rtjohnson55
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SOURCE: No heat,hot water is going in the heater core,good

it is the blend door actuator. lol i just did one today since here in Houston we had a little cold snap and everyone is realizing that their heater isn't working. The blend door actuator is on the bottom of the heater case and has one plug with 4 or 5 wires. It requires a 5.5mm socket to remove 3 screws and just pull down to release it. Hope this helps.

Posted on Dec 06, 2009

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c17hydro
  • 2984 Answers

SOURCE: I am doing a heater

Here is the removal and installation from start to finish...take a look and see where you are at in the steps...

  1. Disable the SIR system, as outlined in this section.
  2. Disconnect the negative battery cable.
  3. Properly drain the cooling system.
  4. Raise and safely support the vehicle.
  5. Detach the heater hoses from the heater core.
  6. Carefully lower the vehicle.
  7. Remove the instrument panel. For details, please refer to the procedure located in Section 10 of this manual.
  8. Remove the DERM with the attaching bracket.
  9. Detach the heater core cover.
  10. Unfasten the heater core mounting clamps, then remove the heater core.

fc77402.gif
Exploded view of the heater core and related components

To install:
  1. Position the heater core, then secure with the mounting clamps.
  2. Attach the heater core cover.
  3. Install the DERM with the attaching bracket.
  4. Install the instrument panel, as outlined in Section 10 of this manual.
  5. Raise and safely support the vehicle.
  6. Connect the heater hoses to the core.
  7. Carefully lower the vehicle.
  8. Properly refill the engine cooling system and check for leaks.
  9. Enable the SIR system.
  10. Connect the negative battery cable, then start the engine and check for proper system operation and/or leaks.

Posted on Dec 06, 2009

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SOURCE: How do I remove the dash board of a 2003 Impala to replace heater

you don't have to remove the dash to do this job

Posted on Mar 07, 2010

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ZJLimited
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SOURCE: trying to replace heater core 1994 s10 4 cyl

GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide



Heater Core - REMOVAL & INSTALLATION
1994-97 Vehicles
(see Figure 1)

44d2ba8.jpg

Fig. 1: Exploded view of a common heater core and case assembly

  1. Disconnect the negative battery cable and properly drain the engine cooling system to a level below the heater core.
  2. Disconnect the heater hoses from the core tubes near the cowl.
The instrument panel carrier is designed not only to provide access to parts through removal of the carrier components, but the carrier will also tilt downward as a complete assembly to allow access from the top. If this is desired, remove the retainer screws along the top and bottom of the carrier assembly (refer to the figure). The instrument panel will then tilt as an assembly into the cab. It is necessary to unbolt and lower the steering column from the carrier to allow for maximum movement of the instrument panel.
  1. The instrument panel must be removed or repositioned for access to the heater core case. Unbolt and either tilt the instrument panel forward or disengage the instrument panel components and remove the panel from the vehicle. In most cases, tilting the panel forward should be sufficient for the necessary access.
  2. Unfasten the heater core rear case retaining screws, then remove the rear case for access to the heater core.
  3. Loosen the retainers and remove the heater core retaining straps.
  4. Remove the heater core and seals.
To install:
  1. Install the heater core and seals, taking care not to damage the core tubes when inserting them through the cowl.
  2. Install and secure the core retaining straps.
  3. Install the rear case and secure using the screws.
  4. Reposition and secure the instrument panel and components. Tighten the cowl screws to 17 inch lbs. (1.9 Nm) and the lower instrument panel screws to 66 inch lbs. (7.5 Nm).
  5. Connect the heater hoses to the core tubes.
  6. Connect the negative battery cable, then properly refill the engine cooling system.
  7. Run the engine at normal operating temperature, then check for leaks.

Good luck (remember rated this post).

Posted on May 19, 2010

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1 Answer

How do I replace the heater core?


most cars and trucks now have the a/c and heater core behind the dash - the dash has to be taken out to get to the heater core look to see where your heater core hoses goes thru the firewall - if it is directly behind the motor your heater core is on the other side of the firewall

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the heater core is leaking and is bad need to be replaced this will cause u to over heat if u do not keep a eye on it and smell bad in side u car and if u turn on the defost it should fog the winshield up as well

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Some heater cores are up and under the dash (usually passenger side) but most newer ones have it in the firewall under the hood on passenger side which is fairly easy!!

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Looking for heater core replacement instructions for 1997 Ford F250 Heavy Duty, 5.8L V-8 w/ A/C. Please tell me I don't have to remove the dash! Thanks!


Drain your coolant low enough that it wont make a mess when you remove the the hose from the heater core under the hood, then remove the glove box door, looking at the heater box thru the glove box door opening remove seven (7) screws on the heater box, remove the panel and then remove the heater core, opposite to reinstall.

Mar 26, 2011 | Ford F-250 Cars & Trucks

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I need to know how to replace the heater core, is it something i can handle or do i need to take it somewere?


usually not that hard on an older GM. locate approx location of heater core by looking for two matching size water lines that enter the passenger compartment thru the firewall from the engine compartment. go inside under dash and look for the heater core box. remove screw to open and expose the heater core

Sep 08, 2010 | 1993 Buick LeSabre

1 Answer

No heat,hot water is going in the heater core,good


it is the blend door actuator. lol i just did one today since here in Houston we had a little cold snap and everyone is realizing that their heater isn't working. The blend door actuator is on the bottom of the heater case and has one plug with 4 or 5 wires. It requires a 5.5mm socket to remove 3 screws and just pull down to release it. Hope this helps.

Dec 06, 2009 | 1999 Chevrolet Silverado 1500

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Need more detailed Instruction on how to replace heater core


Answer
Once again you have an ALL DAY JOB ahead of you. YES, You have to remove the "whole dash".

However, Sometimes you can get LUCKY and only unbolt it without pulling all the wires and cables and junk and it will come back just far enough to be able to remove the heater box.

NOTE: I have found that on SOME Ford models.,:

They install the heater core in the interior plastic housing and mount it on the firewall with the studs protruding thru the firewall then they put on the NUTS from the engine compartment side onto the bolts to hold the assembly onto the firewall.

Then when they mount the engine compartment housing OVER these same studs that protrude thru the firewall and then they install a SECOND NUT to hold the firewall compartment on.

So you have 2 nuts on the same bolt. Therefore you have to take the engine compartment side housing side off FIRST and then you will see the set of NUTS that hold the interior housing onto the firewall,

Oct 18, 2009 | 1993 Ford Escort 4 Door

1 Answer

1994 buick lesabre heater core removal


The heater core is located under the dash, in the center. The container holding the core looks like a black plastic box. Remove the ash tray for easier access. You may have to also remove some other covers under the dash. You must first drain the radiator then you have to disconnect the hoses. There are two hoses connected to nipples of the heater core that go thru the center of the firewall. Remove the screws that hold on the cover to the heater core. Then you should be able to get the old one out. There might be a couple of other minor steps but I'm sure you can figure them out. For re-installation just go in reverse order to put it all back together.

May 25, 2009 | 1994 Buick LeSabre

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YOU DO NOT NEED TO REMOVE THE DASH BOARD. IT WILL BE BEHIND THE GLOVE BOX. LOOK UNDERNEATH THE DASH AND YOU WILL NEED TO REMOVE A PANEL TO GAIN ACCESS TO THE HEATER CORE. THE PANEL WILL BE ABOVE THE PASSENGERS FEET ON THE FIREWALL.

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Removing the heater core from 2000 silverado


When I replaced the heater core on my 95 Suburban, I seem to remember having to disconnect the A/C lines on the firewall for the evaporator. There were also several nuts to remove on the engine firewall side from studs on the heater box that pass thru the firewall. It is definately a lot of work.

Good luck.

Jan 10, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

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