Heater core, A/C or non-A/C?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMCjunkie · 03-20-2002, 08:46 AM

Whats the difference?? When I ordered the heater core for my Burb he asked me if it was factory a/c, but the one in my Burb "looks" the same as the one in the non-a/c step. Is there gonna be something different about changing the a/c one?? Just curious what I may run in to, I dont know if I dont ask. Thanks guys.

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SILLY BOYZ......TRUCK ARE FOR GURLZ !!

**1971Stepside** · 03-20-2002, 09:33 AM

Now it has been some time since I did the swap on mine, but I do recall that the non ac core is much different. I believe the major difference is the houses or spouts that come off the core itself are shaped very differently. I believe the bottom hose on the ac version is much longer. Someone else can probably give you the specifics, but I do know they are different.

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2001 GMC 2500HD Crew Cab Duramax, Allison, 4WD, Love it

1971 Chevrolet 1/2 ton 2WD Short/Step Side. In process of frame off restoration

JimKshortstep4x4 · 03-20-2002, 10:54 AM

The inlet/outlets on the AC heaters are almost a foot long and they curve up to the corner of the heater box because the heater core mounts at an angle. The AC tubes are so long that there is a support on the side of the heater box to hold them in place.

The non AC heater core has the tubes coming straight out at the top and bottom and they are only about 3" long. If you looked at them side by side the differences will be very obvious.

Jim

GMCjunkie · 03-20-2002, 01:04 PM

Thank you!!!! I appreciate your help!!!!

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SILLY BOYZ......TRUCK ARE FOR GURLZ !!

03-20-2002, 08:46 AM	#1
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	Heater core, A/C or non-A/C?? Whats the difference?? When I ordered the heater core for my Burb he asked me if it was factory a/c, but the one in my Burb "looks" the same as the one in the non-a/c step. Is there gonna be something different about changing the a/c one?? Just curious what I may run in to, I dont know if I dont ask. Thanks guys. ------------------ ------------------------- SILLY BOYZ......TRUCK ARE FOR GURLZ !! __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

03-20-2002, 09:33 AM	#2
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	Now it has been some time since I did the swap on mine, but I do recall that the non ac core is much different. I believe the major difference is the houses or spouts that come off the core itself are shaped very differently. I believe the bottom hose on the ac version is much longer. Someone else can probably give you the specifics, but I do know they are different. ------------------ 2001 GMC 2500HD Crew Cab Duramax, Allison, 4WD, Love it 1971 Chevrolet 1/2 ton 2WD Short/Step Side. In process of frame off restoration __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

03-20-2002, 10:54 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	The inlet/outlets on the AC heaters are almost a foot long and they curve up to the corner of the heater box because the heater core mounts at an angle. The AC tubes are so long that there is a support on the side of the heater box to hold them in place. The non AC heater core has the tubes coming straight out at the top and bottom and they are only about 3" long. If you looked at them side by side the differences will be very obvious. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

03-20-2002, 01:04 PM	#4
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	Thank you!!!! I appreciate your help!!!! ------------------ ------------------------- SILLY BOYZ......TRUCK ARE FOR GURLZ !! __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4



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