Need tips on replacing heater cor on my 72 Jimmy - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 Jimmy Power · 09-24-2020, 02:48 PM

Hi, Going to replace my heater core very soon. Jimmy has A/C any tips or info will be greatly appreciated. I know it is a hassle to change. Thank you.

**DeadheadNM** · 09-24-2020, 07:03 PM

Drop the inner fender right off the bat. Line the interior with something to catch any leaking fluid.

The repro cores can be ill fitting I’ve read. OEM cores can be repaired and reused. Check with Classic Heartbeat or GMC Paul if you plan to use a new core as they may have a better fitting example than a bigger retailer.

**Richard** · 09-25-2020, 04:48 AM

Agree with DeadheadNM's recommendations. Have not done one for some time. Last time I saw an aftermarket it was thinner and did not fit correctly or heat as well. If you have a local radiator shop see if you can have the stock one repaired or re-cored.

72 Jimmy Power · 09-25-2020, 11:11 AM

Thanks Guys. Starting this weekend.

09-24-2020, 02:48 PM	#1
72 Jimmy Power Registered User Join Date: Mar 2019 Location: South San Francisco, California Posts: 468	Need tips on replacing heater cor on my 72 Jimmy Hi, Going to replace my heater core very soon. Jimmy has A/C any tips or info will be greatly appreciated. I know it is a hassle to change. Thank you.

09-24-2020, 07:03 PM	#2
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: Need tips on replacing heater cor on my 72 Jimmy Drop the inner fender right off the bat. Line the interior with something to catch any leaking fluid. The repro cores can be ill fitting I’ve read. OEM cores can be repaired and reused. Check with Classic Heartbeat or GMC Paul if you plan to use a new core as they may have a better fitting example than a bigger retailer. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

09-25-2020, 04:48 AM	#3
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,855	Re: Need tips on replacing heater cor on my 72 Jimmy Agree with DeadheadNM's recommendations. Have not done one for some time. Last time I saw an aftermarket it was thinner and did not fit correctly or heat as well. If you have a local radiator shop see if you can have the stock one repaired or re-cored. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746

09-25-2020, 11:11 AM	#4
72 Jimmy Power Registered User Join Date: Mar 2019 Location: South San Francisco, California Posts: 468	Re: Need tips on replacing heater cor on my 72 Jimmy Thanks Guys. Starting this weekend.



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