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Heater core change, Remove dash help

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Old 03-16-2010, 06:06 PM   #1
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Default Heater core change, Remove dash help

hey guys u got a 96 a4 2.8 and i need to change my heater core and going at it tomorrow morning. Need all the help i can get please guys. I read the tech article on do this like 30 times but was wondering if there is any offical DIY on it or where can i get the bently manual from. Any help would be highly appreciated.
thanks guys
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Old 03-17-2010, 08:29 AM   #2
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The Bentley is not all that helpful in this honestly.. I don't know which writeup you saw, if it was the one I did or not.. Best bet is to take your time, keep all fasteners in bags or magnet trays..

http://www.audiworld.com/tech/int54.shtml
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Old 03-17-2010, 09:06 AM   #3
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Agree and disagree. The write-ups are generally much better than Bentley. The collect information scattered throughout Bentley and present it with good tips and pictures.

That said, while you do have to hunt around more in Bentley, it breaks the tasks into granular pieces.

Ideally, I like both, but both should be taken with a grain or two of salt. A combination of the two is probably the best bet.
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Old 03-17-2010, 09:13 AM   #4
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Originally Posted by Pete_A4 View Post
hey guys u got a 96 a4 2.8 and i need to change my heater core and going at it tomorrow morning. Need all the help i can get please guys. I read the tech article on do this like 30 times but was wondering if there is any offical DIY on it or where can i get the bentley manual from. Any help would be highly appreciated.
thanks guys
Bentley Manual is here, doubt you can get it that quickly. You might try E-bahn.

http://www.bentleypublishers.com/audi/a4/1996-2001/

You should think about changing the AC core at the same time as unless it has been done before it will probably fail soon. The AC core that was made in France is the weak link on this era of audis(no jokes please).

Use lots of ziplok bags to seperate everything and label all the nuts and fasteners . It's a bear of a job, took me about 12 hours.Use new seals on the AC lines they are the purple ones.

A 1/4 power ratchet or screwdriver with lots mm sockets extensions and torx bits is a great help.
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Old 03-17-2010, 09:53 AM   #5
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guys just took everything about took about 4 hrs and teh new heater core i got is from a 99 and mine is a 96 and they dont seem identical. The 99 has different electrical inputs and def not the same and way i can modd it to fit or did i just *** myself
thanks
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Old 03-17-2010, 10:05 AM   #6
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The 99 core is different IIRC..
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Old 03-17-2010, 10:06 AM   #7
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Well, for a n00b, the Bentley can be hard to follow. But, I use it all the time. It helps explain where that last bolt you can't find is, it helps show what's under the thing you're trying to remove, etc.

I really like the Bentley. However, I may have referred to it a few times in the 8 or so hours it took to do the heater core on my A4.
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Old 03-17-2010, 11:04 AM   #8
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Well, for a n00b, the Bentley can be hard to follow.
No question. It's an acquired taste. Patience is a "must". Much better to take time somewhere other than in the shop to find your way around prior to actually trying to use it.
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Old 03-17-2010, 04:11 PM   #9
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Quote:
Originally Posted by Pete_A4 View Post
guys just took everything about took about 4 hrs and teh new heater core i got is from a 99 and mine is a 96 and they dont seem identical. The 99 has different electrical inputs and def not the same and way i can modd it to fit or did i just *** myself
thanks
94-96 heater/AC core is unique to those years (A4 was available in Europe in 94).

A little bit of research could have saved you a world of hurt.

Hopefully you are not putting a used heater core ?
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Old 03-17-2010, 06:05 PM   #10
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well now i am going to buy a used one from the junkyard but i was wondering when i put it in if i connect all the wires and hoses if i can plug in the battery to test it to make sure it works??
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Old 03-18-2010, 03:02 AM   #11
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Originally Posted by Pete_A4 View Post
well now i am going to buy a used one from the junkyard but i was wondering when i put it in if i connect all the wires and hoses if i can plug in the battery to test it to make sure it works??
Buying some used oil filters too?

Seriously, do not buy either an evap core or a heater core used. Both are high failure rate items, and both require significant effort to replace. Buy good quality new parts.
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Old 03-18-2010, 04:51 AM   #12
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this is my only car and i have no choice i have work tomorrow gotta get this back and running. Plus its a 96 i don't plan on making this my life long car. but i understand your opinion completley but im just in a tight situation
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Old 03-18-2010, 04:54 AM   #13
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this is my only car and i have no choice i have work tomorrow gotta get this back and running. Plus its a 96 i don't plan on making this my life long car. but i understand your opinion completley but im just in a tight situation
A new heater core is less than $50 online. An AC core is around $250.
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Old 03-18-2010, 05:47 AM   #14
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no no its not just the heater core i have to change the whole heater box. The big black box that controls all the flaps and ventilation
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Old 03-18-2010, 05:54 AM   #15
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Regardless, I'm certain that they are different after the facelift in late 99.

Out of curiosity, why are you changing the whole box? are you sure the problem is the box and flap motors and such? or is it possible that the problem is the heater head unit?
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Old 03-18-2010, 06:11 AM   #16
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Why the whole box? BTW, I probably have one in Connecticut if you are nearby.
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1999 BMW M Coupe (clownshoe)
1980 VW Scirocco (mid-life crisis car)
1983 Mazda RX-7 (revolutionary sports car)
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2003 GMC Yukon Denali XL (the anti-earth)
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Old 03-18-2010, 12:39 PM   #17
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a) I've done that job, I have no idea how you got there in 4 hours. Took me a day, but then I damn near labled every plug in the car.
b) The heater core, AC evaporator, and all the flaps and motors in there are all high risk items. Rent a car, take the bus, whatever......take the time to get new parts.
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Old 03-18-2010, 03:16 PM   #18
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ok guys just got done with everything. put everything back together and is now up and running. I had to change the whole heater box because all the motors were broken and previous owner rigged the blower motor inlet to fit a 99 blower motor. I had to buy i new climate control as well but now everythings good to go.

New question. I put coolant and all drove the car around the block but didnt seem to get real hot air?? I did not replace the heater core but i can access it with just taking out the glove box also how can i recharge the A/C?

thanks alot for all your help
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Old 03-18-2010, 03:37 PM   #19
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If all you drove was around the block, I'm guessing you might still have an air bubble in the system. Don't panic till you drive farther.
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Old 03-18-2010, 05:59 PM   #20
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guys if i ever needed your help more than ever. So i put everything back together and realized im looking coolant inside the car. It is leaking from a nipple plastic piece from the bottom of the heater box. also there was coolant inside the box idk if that is normal? im begging for anyones help if you have any pics of guides on how the tubes are put back together id really appreciate it. I took everyhting back out of the car now im back to square one. please please help me out. theres a tube that goes from in between the inlet outlet tubing of the coolant that runs to a plastic container on the back. thats the tubing setup that idk how it goes about
thanks again
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Old 03-18-2010, 05:59 PM
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