Heater core
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Junior Member
Joined: Dec 2003
Posts: 34
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From: ohio
Car: 87gta 88notch 89 5spdgta 92 vert
Engine: 5.7
Transmission: 700r4
Heater core
where can i buy a stock replacement heater core for an 87 gta ?Aftermarket ones body to wide to fit in the strap ! Thanks James
Supreme Member
iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: Heater core
I used one from Autozone when I replaced mine without issues.
Joined: Aug 2006
Posts: 12,805
Likes: 107
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Heater core
i ran into this problem with a delco replacement one. the metal clips would not fit on it.
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Joined: Apr 2007
Posts: 1,592
Likes: 18
From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: Heater core
Your installing it wrong !
You have to slide the end (opposite the pipes) into the heater box first and slide it back inside the box then push the pipe end in place.
Trying to put the pipe side end in first doesn't allow the other side to mount back inside the heater box all the way.
I had the same issue when I replaced my heater core and thought it was too big (even though it was the SAME size as the factory core).
I was just doing it wrong!
You have to slide the end (opposite the pipes) into the heater box first and slide it back inside the box then push the pipe end in place.
Trying to put the pipe side end in first doesn't allow the other side to mount back inside the heater box all the way.
I had the same issue when I replaced my heater core and thought it was too big (even though it was the SAME size as the factory core).
I was just doing it wrong!
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Joined: Mar 2009
Posts: 3,079
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: Heater core
Your installing it wrong !
You have to slide the end (opposite the pipes) into the heater box first and slide it back inside the box then push the pipe end in place.
Trying to put the pipe side end in first doesn't allow the other side to mount back inside the heater box all the way.
I had the same issue when I replaced my heater core and thought it was too big (even though it was the SAME size as the factory core).
I was just doing it wrong!
You have to slide the end (opposite the pipes) into the heater box first and slide it back inside the box then push the pipe end in place.
Trying to put the pipe side end in first doesn't allow the other side to mount back inside the heater box all the way.
I had the same issue when I replaced my heater core and thought it was too big (even though it was the SAME size as the factory core).
I was just doing it wrong!
some (I think most) of the aftermarket replacement ones have a slightly different oversized end tank design. the straps he's referring to are the ones on the cover. I left mine off when I did mine - its really not going to be moving around enough for me to worry about it. If you're worried, you can always use a little foam weatherstripping (like you use on your house doors/windows) to stop it from touching the sides of the box. Yeah it stinks, but sometimes its not worth worrying about. Lots of other things to tinker with anyway!
Thread Starter
Junior Member
Joined: Dec 2003
Posts: 34
Likes: 0
From: ohio
Car: 87gta 88notch 89 5spdgta 92 vert
Engine: 5.7
Transmission: 700r4
Re: Heater core
up date ! found one at pep boys. aluminum. pretty dm close to oem fits perfect. with strap on an the v clip .
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