Question about 1993 Audi 90

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How difficult is it to replace a heater core in a 1993 audi 90 quattro? can znyone give me an idea on how to remove the dash?

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  • doylett Mar 10, 2009

    no i don't know how to remove the dash can you describe how?

    thanksi

  • doylett Mar 10, 2009

    ok thanks...i have a manual on disk but don't have access to it now I assume from your note it is involved

  • doylett Mar 14, 2009

    Is there a way to bypass the heater core temporarily and just connect the engine block and radiator that wouldn't involve removing the dash.... I'd like to be able to drive it until I can fix it properly.

    Thanks

  • yadayada
    yadayada May 11, 2010

    about 12-15 hours for a DIYer

  • yadayada
    yadayada May 11, 2010

    the procedure is to long for this forum's dialog limit, suggest you buy a used factory repair manual on ebay motors, around $75-$125

  • yadayada
    yadayada May 11, 2010

    do u know how to remove the dash assmebly?

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  • Audi Master
  • 60,989 Answers

When u do this take your time, don't force anything, if it wouldn't come out then u missed a retainer somewhere, also the heater core requires taking apart the air ducting, and make sure everything is hooked back up, take allot of picture's before hand to document where everything goes, the manuals are for professional factory tech's and they assume allot of basic knowledge, in other words they don't spell out every little detail.

Posted on Mar 10, 2009

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1 Answer

How dfficult is it to replace the heater core in a 93 audi 100 cs quattro v6


Baloney! Removing the center console is not difficult but it is beneficial to have step-by-step instructions. Seats do not need to come out but they do need to be moved fore and aft depending on access needs. The trickiest part is getting the console with leather sheath for the parking break off and out. Pull the parking break handle up, lift the console up and work the whole assembly forward and free from the PB handle. Pulling out left and right footwell ductwork is not hard. Putting it back in is a finesse action. German engineers have thought these things through and if something seems extraordinarily difficult, it's usually because you haven't figure out the recipe yet. Buy a shop manual and think it through before acting and you'll be surprised how easy it is. I'll be R&R'ng the heater core on the wife's car and will allow three hours start to finish. However, I've had the heater box in and out of the car for various reasons over the years. Allow six hours if first time. Hope this helps..

Jan 20, 2011 | 1993 Audi 100

1 Answer

How do i remove the heater core from a 1988 audi 90? ... my heater core blew and i was wondering if i can get to it from under the dash or if i will have to remove the entire dash to get to it?


If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Dec 27, 2010 | 1988 Audi 90

1 Answer

Only drivers side heat is blowing cool air, passanger side is working fine. are there two different heating untis for this car since it has two separate controls? could it be a sensor or a flap? flap...


No there is one heating unit that has a flap that is controlled by the passenger side vs. driver side cooler or hotter knob or setting, if it's like my Cadillac. It's called a blend door. There is only one heater core that feeds the two separate sides.

Will have to pull the dash, and inspect the vacuum lines and cables.

If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core.
Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Nov 12, 2010 | Audi A4 Cars & Trucks

1 Answer

Where is the control valve that controls the flow of coolant through the heater core in a 1993 Audi Quattro CS 90


on modern VW (group)product,they do not have a valve any more.they use a flap inside the heater box to control the flow of air instead.

Oct 25, 2010 | Audi 90 Cars & Trucks

1 Answer

1993 90: 1993 water pump location...


Water pump sits in the front of the engine top centerline. Look just below the coil pack. It uses the timing v-belt for operation so it takes a bit of mechanical know how to remove/replace (r&r) it, as the timing can be thrown off if the v-belt is not reinstalled correctly. Get past the timing belt, the water pump is r&r is just a few bolts away. I'm currently babying my water pump...the part is relatively inexpensive compared with an almost $500 labor charge (5hrs, dealer est.) to replace it. I'll be hitting up the dealer as my '93 Audi 90 CS Quattro is a daily driver. G/L

May 16, 2010 | 1993 Audi 90

1 Answer

1993 Audi 90 Quattro Where is the headlights on/door chime located? And how do I remove it?


located on there relay board (underneath steering wheel), it's the relay with the holes on the top (tiny speaker)

Feb 10, 2010 | 1993 Audi 90

2 Answers

Need a timing belt diagram for a 1993 audi 90 quattro please hlep


I am not sure if you have the 90 or the 90 Quattro.
Click on the below Links.
The first Link is all the Diagrams on the Timing Belt for the 90 Model.
The second link is all the Diagrams on the Timing Belt for the V8 Quattro.
Before clicking, let me know if this helped you.
For the 90 Model:
http://www.2carpros.com/car_repair_information/year/1993/make/audi/model/90/1993_audi_90_timing_belt_diagram_marks.htm

For the V8 Quattro:
http://www.2carpros.com/car_repair_information/year/1993/make/audi/model/v8_quattro/1993_audi_v8_quattro_timing_belt_diagram_marks.htm

Jan 31, 2010 | 1993 Audi 90

1 Answer

Bypassing heater core on 1993 audi 90


yes u can bypass the **** core. all you need to do is, take the two hoses going to the heater core, and take em off the heater core, take one hose comply off, and hook the other remaining hose were the other hose was hooked up at.. this will bypass your heater core, but keep in mind you will not have hot air in the cabin of the car..keith...

Mar 14, 2009 | 1993 Audi 90

1 Answer

Heater core


Ok to replace the heater core in the allante you must first take the door off the glove box by removing 4 screws in the corners by the hinges. Remove the valence below the dash on the passenger side.

Now follow these steps

1. remove the radio module disconnect all wires and set it aside
2. Remove the bracket that holds the engine control module slide it out and away
3. Remove the duct control unit slide it down and out from under the dash
4 remove the screws that hold the duct work together, rotate to right and then down from under the dash
5. After the prior the heater core is in view. it has two 8 mm screws holding it in place remove them
6. Now go under the hood with a long extension loosen the clamps on the heater core
7. with at least a 12 inch thin bent flat screwdriver at a 90 degree angle loosen the hose and wiggle it off the heater core nipples
8. Go back into the cockpit and remove the heater core by sliding rearward and to the right
9. Angle hater core down and slide out.
10. reverse to reassemble.

Aug 11, 2008 | 1993 Cadillac Allante

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