SJW

This is good news, no matter how stale. I haven't had to do a core swap on either of my C4s yet, but was somewhat dreading the arrival of that day.

A very belated "Thanks!" to the OP.

Live well,

SJW

mrmtrtrnd

This maybe a old thread but one that is just as relevant today as it was back then. This will be great news for anyone facing a core replacement. Don't know if this is somewhere as a sticky but if not it should be.

WW7

Fastguy is still around, he's just working on C5 heater cores now.....WW

DinoBob

That article scared the beejesus out of me. I felt like I was flushing my cooling system with a gun to my head. I feel much better now.

kleptopigdog

Is this not just for the early style c4?

black88z51

Time to remove the bypass!!

[IMG][/IMG]

ghlkal

Yeah, I'd think it'd be a little cold without your heater in Canada this time of year

WW7

Yes , this method is only for the 84-89...All the rest after that, its easier to just sell the car and buy a new one......WW

kleptopigdog

No doubt. It took a while on my 94 .Not hard just time consuming. One more thing , the factory core seems like a more quality piece than auto zone/ oriellys .I took it back and found a factory piece.

Bobby Joe

Could you please describe how you went about doing this for your 94? How much different was it?
Thanks

Sleazy Rider

i pulled the carpet also to let it dry out...and dried the floor.

peyc2

Yea I've been delaying mine for 2 months. Seams it be doable after all

scorp508

Yeah... it's kind of shocking an 84-89 'vette hasn't changed since 2003 isn't it? This kind of knowledge is ageless and I welcome such thread necropsy.

jerryg01

Do you have any idea if the 95 Heater Core replacement procedure is the same as you have described here? Sure be nice to be able to do it without pulling the dash cover.

DHobbs

This is great

cesmachines

I replaced mine a few weeks ago. I have a 31 page PDF document with photographs that show what you will need to do. If you want a copy send a request to wccautomation@aol.com.

Upstate

Indeed. Glad to see this thread is still helping people and that you are still around. Hope you are doing well.

vettenut94

Hi all anyone out there know how to get a copy of this heater core replacment PDF file the e-mail address isnt working.. and at 150,000 she finally sprung a leak!!! looks like ive got some work aheadthanks in advance for any info.

Red86Z51

You really don't need 31 pages of instructions....seriously, it's not that intense of a job and pretty self explanatory once you have your head up in the dash.

If you follow the generalized steps outlined in POST#1 of this thread, you'll step right through this job. I used those steps to do my 87's last week and it's exponentially simpler than the hoops I've read that others have jumped through to get this job done.

I will add some additional info to the OP's instructions to make things a little easier:

1. If you have C68 (like I do) you will need to remove the blend door motor. To set it up for re-installation, turn the key on, set the heat to full hot, then turn the key off and unhook your battery (-) terminal--this will set the blend motor movement to the rearward most (hottest) position, which is where it needs to be set upon reassembly for correct operation as per the FSM.

2. You need to drop the hush panel on the driver side to facilitate removal of the small tubular heater duct that comes out of the case and hooks to both sides. There are 3 screws that hold the tube in---2 in the case, and one into the dash frame on the driver side...this duct must come out to allow for removal of the rear heater core case half.

3. Have a mirror handy. It makes removal of the top 2 screws of the heater core case much easier. The outermost top screw is partially visible if you contort you head just so (you make a face kinda like this ). The screw above the blend door motor is out of sight, and you need the mirror for that one.

4. There are 3 screws that hold the heater core to the firewall side of the case, 2 on the bottom holding the strap, one (hidden) on the top directly in the middle holding a V shaped retainer...again, use the mirror to locate that top retainer screw.

Take your time, work methodically, and although not the most pleasant job in the world, it should go smoothly.

vette40509

I get this when I send email to wccautomation@aol.com


This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

wccautomation@aol.com