Heater core replacement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy garage · 09-17-2002, 11:35 PM

I'm gonna have to replace the heater core in my 70 with factory air. Are there any shortcuts? I replaced one in my 72 Cutlass about 10 years ago and it was a nightmare. Any info would be appreciated.

Thanks

**Tim Christian** · 09-18-2002, 06:05 AM

You can get to all the bolts execpt the two behind the inner fender actually you can get one of them with a 1/4in drive ratchet, long ext., and a swevil(sp). But the one in the very corner you have two options you can remove the inner fender or break the corner ear off of it. Not much options is it!

chevy garage · 09-18-2002, 08:02 AM

Thanks, that's what I needed to know. Tim I sent you a PM.

chevy2racr · 09-18-2002, 02:26 PM

when I did my 71 w/ facory air the two behind the innner fender were already broke, but it was still a big ole pain in de @ss!! good luck man

Nichboy · 09-18-2002, 02:33 PM

How much trouble are they to replace if you don't have A/C

1971LT1SWBPOSI373 · 09-18-2002, 02:40 PM

Not too bad, I did a heater core on my 72 a few years back, and I got everything apart and back together again, it took an entire evening to do. I 1/4 set of sockets with a swivel, some masking tape, and a good selection of extensions is about all that you need. Better get a few band aids too. Very time consuming, but overall not too difficult.

chevy2racr · 09-18-2002, 06:08 PM

Nichboy - I believe its easy, don't even have to get under the dash I believe, just go out front and pull the black box off and there ya go

71402BB · 09-18-2002, 06:17 PM

Just a thought but you could always take out all the ones that you can get to and then when it comes to the last 2 you could always go to the inside of the cab and try to drill them out, but I'm not sure if that would be any easyier........ Good luck -Brian

**Tim Christian** · 09-18-2002, 08:52 PM

Hey Chevy Garage, The directions I gave you is for a non-A/C I have never done one with A/C I don't know if there is any difference or not.

chevy2racr · 09-18-2002, 10:09 PM

Tim, with an A/C truck you get fun time on ur back under the dash

09-17-2002, 11:35 PM	#1
chevy garage Registered User Join Date: Aug 2002 Location: Maryville, TN Posts: 239	Heater core replacement I'm gonna have to replace the heater core in my 70 with factory air. Are there any shortcuts? I replaced one in my 72 Cutlass about 10 years ago and it was a nightmare. Any info would be appreciated. Thanks

09-18-2002, 02:26 PM	#4
chevy2racr So Many Ideas, So Little Money Join Date: Sep 2001 Location: Marshalltown, IA Posts: 1,610	when I did my 71 w/ facory air the two behind the innner fender were already broke, but it was still a big ole pain in de @ss!! good luck man __________________ 72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu Marshalltown, Iowa

09-18-2002, 02:33 PM	#5
Nichboy Registered User Join Date: Jun 2001 Location: Oklahoma City Oklahoma Posts: 173	How much trouble are they to replace if you don't have A/C __________________ 1971 Chevy SWB Oklahoma City, Oklahoma

09-18-2002, 02:40 PM	#6
1971LT1SWBPOSI373 Registered User Join Date: Mar 2002 Location: Springfield, VA Posts: 460	Not too bad, I did a heater core on my 72 a few years back, and I got everything apart and back together again, it took an entire evening to do. I 1/4 set of sockets with a swivel, some masking tape, and a good selection of extensions is about all that you need. Better get a few band aids too. Very time consuming, but overall not too difficult. __________________ 1971 Shortbed 350/350 w/ Posi-traction 3:73's 1996 Chevy Silverado TJ in Springfield, Virginia Likes old Chevy trucks Drinks Miller MGD

09-18-2002, 06:08 PM	#7
chevy2racr So Many Ideas, So Little Money Join Date: Sep 2001 Location: Marshalltown, IA Posts: 1,610	Nichboy - I believe its easy, don't even have to get under the dash I believe, just go out front and pull the black box off and there ya go __________________ 72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu Marshalltown, Iowa

09-18-2002, 06:05 AM	#2
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,388	You can get to all the bolts execpt the two behind the inner fender actually you can get one of them with a 1/4in drive ratchet, long ext., and a swevil(sp). But the one in the very corner you have two options you can remove the inner fender or break the corner ear off of it. Not much options is it!

09-18-2002, 08:02 AM	#3
chevy garage Registered User Join Date: Aug 2002 Location: Maryville, TN Posts: 239	Thanks, that's what I needed to know. Tim I sent you a PM.

09-18-2002, 06:17 PM	#8
71402BB now thats a true COON DOG Join Date: Nov 2000 Location: Franconia, NH Posts: 1,977	Just a thought but you could always take out all the ones that you can get to and then when it comes to the last 2 you could always go to the inside of the cab and try to drill them out, but I'm not sure if that would be any easyier........ Good luck -Brian __________________ current project 67 402BB stout th350 3.08's with a locker. Plan on tubs 18.5's out back! (thanks Burnsman!) 71 SWB Stepside, was a 250, now is a 402 Big Block with 4 speed and 3.73's ( was crushed by a tree, bed sold, motor pulled) was my first truck!... oh well... 72 LWB 4x4 350 4-speed 3.08's posi wearing army olive drab green (SOLD!) 68 BURB 50TH LOOKALIKE work in progress, soon to have 250-I6 with a 3-speed on the tree 4.11's and posi ( currently sitting in back yard tarped awaiting time, $$$, and lots of love!) 67 1 TON- work truck 396 sm 420 4-speed, flat bed 4.57 gears "big red" (my first landscape truck, very rusty and crusty! but still gets the job done when needed!)

09-18-2002, 08:52 PM	#9
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,388	Hey Chevy Garage, The directions I gave you is for a non-A/C I have never done one with A/C I don't know if there is any difference or not.

09-18-2002, 10:09 PM	#10
chevy2racr So Many Ideas, So Little Money Join Date: Sep 2001 Location: Marshalltown, IA Posts: 1,610	Tim, with an A/C truck you get fun time on ur back under the dash __________________ 72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu Marshalltown, Iowa

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