Heater box removal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**KyFarm** · 10-30-2013, 07:12 PM

Well the secret disappearing coolant has been solved. I have a leaking heater core.

I was told by a friend that I could get it out through the inside of the truck, Nope. So I began removing the heater box holding the core to the firewall. Got down to the last bolt and I am stuck.

How do you get to the bottom far left (under the blower motor) bolt holding the heater box to the firewall out?

There has to be some secret other than removing the entire wheel well hopefully because the bolts holding that to the front quarter panel turn but don't come lose.

I tried all my extensions and knuckle drives and I just cannot get to it. Any help is greatly appreciated.

truck is a '69 K10

**Daddy Brim** · 10-30-2013, 07:39 PM

You do not have to remove the inner finder. But you will need to drop it down some. Start by removing the bolts closest to the door until you can pry it enough to get your hand inside.

JointTech · 10-30-2013, 08:56 PM

the word on the street is you can get to that bolt without taking out the inner fender. I think it might be possible bu only if you already know exactly where it is. I couldnt do it and just took the whole inner fender out. I think I cut a few bolts off to get it out and its stillsitting in the shop waiting for grinding and painting... on my long list of things to do.

**LockDoc** · 10-30-2013, 09:24 PM

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Even if you get the bottom bolt out you probably won't get it back in. You will also have trouble getting the gasket in place. I would just pull the inner fender out.

LockDoc

Z10 · 10-30-2013, 09:48 PM

Just did it this yesterday. I'm in the process of putting a vintage air system in so the heater box had to go.

1. Remove hood.
2. Remove passenger side hood hinge
3. Long wobble extension, socket.

No need to touch the fender.

Good luck.

**KyFarm** · 10-31-2013, 07:21 AM

Thanks all

Seems more disassembly is required one way or the other......

briank · 10-31-2013, 10:34 AM

I just did this too but didnt remove the hood or hinge. Just drop the inner fender down. It also depends on your hands size. Not a fun job.

quick60 · 10-31-2013, 11:08 AM

I removed the hood and inner fender Not necessary to remove the hood but the inner fender is actualy very easy to remove It actually allowed room to access a whole bunch of stuff that you would not think of.

I loosened the top fender bolts to to get the heater box back in. Made it easier to seat the new gasket for the blower fan to fire wall.

10-30-2013, 07:12 PM	#1
KyFarm Senior Member Join Date: Sep 2009 Location: Taylorsville, KY Posts: 264	Heater box removal Well the secret disappearing coolant has been solved. I have a leaking heater core. I was told by a friend that I could get it out through the inside of the truck, Nope. So I began removing the heater box holding the core to the firewall. Got down to the last bolt and I am stuck. How do you get to the bottom far left (under the blower motor) bolt holding the heater box to the firewall out? There has to be some secret other than removing the entire wheel well hopefully because the bolts holding that to the front quarter panel turn but don't come lose. I tried all my extensions and knuckle drives and I just cannot get to it. Any help is greatly appreciated. truck is a '69 K10 __________________ KyFarm's Build/Need help thread 1969 K-10, Short Step, (383HT/4L70E soon)-NP205

10-30-2013, 07:39 PM	#2
Daddy Brim Senior Member Join Date: Feb 2011 Location: Clovis Ca. Posts: 632	Re: Heater box removal You do not have to remove the inner finder. But you will need to drop it down some. Start by removing the bolts closest to the door until you can pry it enough to get your hand inside. __________________ I'm sorry I called you stupid. I thought you knew already. 67 C-20 Custom Camper 68 Nova 396 it does wheelies 2005 Buick Century the one the wife drives 1989 Toyota Tercel to drive when I can't put gas in the first 2. Last edited by Daddy Brim; 10-31-2013 at 07:57 AM.

10-30-2013, 08:56 PM	#3
JointTech Registered User Join Date: Feb 2012 Location: Mission Viejo, CA Posts: 1,858	Re: Heater box removal the word on the street is you can get to that bolt without taking out the inner fender. I think it might be possible bu only if you already know exactly where it is. I couldnt do it and just took the whole inner fender out. I think I cut a few bolts off to get it out and its stillsitting in the shop waiting for grinding and painting... on my long list of things to do. __________________ 72 C20 Long Bed SB350 TH400 14 bolt rear end Extremely boring build thread

10-30-2013, 09:24 PM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,849	Re: Heater box removal - Even if you get the bottom bolt out you probably won't get it back in. You will also have trouble getting the gasket in place. I would just pull the inner fender out. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

10-30-2013, 09:48 PM	#5
Z10 Registered User Join Date: Aug 2012 Location: Midland, TX Posts: 1,267	Re: Heater box removal Just did it this yesterday. I'm in the process of putting a vintage air system in so the heater box had to go. 1. Remove hood. 2. Remove passenger side hood hinge 3. Long wobble extension, socket. No need to touch the fender. Good luck. __________________ 1969 RS/SS Z10 Camaro Pace coupe 1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218 1979 Mazda RX7 1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary 1999 Honda Valkyrie 2006 Corvette Z06 2010 BMW 650i

10-31-2013, 07:21 AM	#6
KyFarm Senior Member Join Date: Sep 2009 Location: Taylorsville, KY Posts: 264	Re: Heater box removal Thanks all Seems more disassembly is required one way or the other...... __________________ KyFarm's Build/Need help thread 1969 K-10, Short Step, (383HT/4L70E soon)-NP205

10-31-2013, 10:34 AM	#7
briank Registered User Join Date: Sep 2011 Location: Leland, Il Posts: 1,503	Re: Heater box removal I just did this too but didnt remove the hood or hinge. Just drop the inner fender down. It also depends on your hands size. Not a fun job.

10-31-2013, 11:08 AM	#8
quick60 Registered User Join Date: Dec 2012 Location: Virginia Posts: 233	Re: Heater box removal I removed the hood and inner fender Not necessary to remove the hood but the inner fender is actualy very easy to remove It actually allowed room to access a whole bunch of stuff that you would not think of. I loosened the top fender bolts to to get the heater box back in. Made it easier to seat the new gasket for the blower fan to fire wall.



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