a new heater core = huge heat but it didnt fit well - why? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**passthebuck** · 07-25-2004, 11:26 PM

Hey all. I changed the heater core in my red 67 today & the core I got from the parts place was 1/4" thinner than factory. The instructions for the new one said that you may have to use foam &/or adjust the brackets & they also say that the 2" core is more efficient that the 2 1/4" old one. I used two pieces of blue house insulation foam to shim it up. It throws MEGA heat now.

I've seen this post here before but I cant find it now via the search method. What did you all do to solve this problem? Could a guy get his old heater core recored OR are proper brackets availible for the 2" core?

Martin64 · 07-25-2004, 11:36 PM

I made new brackets for mine. I'm not worried too much about OEM when it comes to a heater core as long as it fits in the box and I get heat out of it.

shuttermutt · 07-26-2004, 12:50 AM

When I had mine blow out, I tried two different cores from two different places. They were both exactly 1/2 inch too thin. I ended up having mine re-cored for about $80 at a local shop. It was worth it to me.

Oh, and now's a good time to put on a 12 or 13 pound radiator cap. You don't need a high pressure cap and the heater core will thank you.

Blue Beard · 07-26-2004, 07:59 AM

When I changed mine the mounting brackets wouldn't even fit over the end caps. Had to go to a different brand, solved everything.

BtnkBndt · 07-26-2004, 08:17 AM

I just snaged a pair o0f brackets from a later model truck. I believe the 69 up models used the thinner core.

07-25-2004, 11:26 PM	#1
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	a new heater core = huge heat but it didnt fit well - why? Hey all. I changed the heater core in my red 67 today & the core I got from the parts place was 1/4" thinner than factory. The instructions for the new one said that you may have to use foam &/or adjust the brackets & they also say that the 2" core is more efficient that the 2 1/4" old one. I used two pieces of blue house insulation foam to shim it up. It throws MEGA heat now. I've seen this post here before but I cant find it now via the search method. What did you all do to solve this problem? Could a guy get his old heater core recored OR are proper brackets availible for the 2" core? __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

07-25-2004, 11:36 PM	#2
Martin64 Registered User Join Date: Oct 2003 Location: Yuma, Az Posts: 477	I made new brackets for mine. I'm not worried too much about OEM when it comes to a heater core as long as it fits in the box and I get heat out of it. __________________ Martin Gibson USAF Retired 1964(-ish) C10

07-26-2004, 12:50 AM	#3
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	When I had mine blow out, I tried two different cores from two different places. They were both exactly 1/2 inch too thin. I ended up having mine re-cored for about $80 at a local shop. It was worth it to me. Oh, and now's a good time to put on a 12 or 13 pound radiator cap. You don't need a high pressure cap and the heater core will thank you. __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

07-26-2004, 07:59 AM	#4
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	When I changed mine the mounting brackets wouldn't even fit over the end caps. Had to go to a different brand, solved everything. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

07-26-2004, 08:17 AM	#5
BtnkBndt Pennyless Fool Join Date: Oct 2003 Location: Forney,Tx Posts: 439	I just snaged a pair o0f brackets from a later model truck. I believe the 69 up models used the thinner core. __________________ "Who owns this car with the peace sign, the mag wheels, and four on the floor?" 67 Short Step 283/TH400/4.11



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