CUTLASS Heater core replacement question

rfpowerdude

G-Body Guru

Jul 15, 2013

718

1,208

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111

Palm Bay, Fla

• Nov 27, 2024

• #1

I have a new heater core that I am going to install. However, it came with some foam that I am not sure is necessary. Should this foam be installed? If so, how? Wrap it around the perimeter? Or just toss it? I don't remember there being anything in there when I took the old one out...

 

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MrSony

Geezer

Nov 15, 2014

6,999

7,188

113

Des Moines, Iowa

• Nov 27, 2024

• #2

Wrap it around. It cushions the heater core. Make sure the V shape on top isn't wrapped over for the hold down bracket.

 

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oldsofb

Royal Smart Person

Supporting Member

Dec 7, 2007

1,453

4,327

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Maryland

www.hutchhiperf.com

• Nov 27, 2024

• #3

The foam goes on the ends (Left and Right) and it's held by the ridges.

Hutch

 

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rfpowerdude

G-Body Guru

Jul 15, 2013

718

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Palm Bay, Fla

• Nov 28, 2024

• #4

Thanks guys!

 

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gp471

Not-quite-so-new-guy

Jan 15, 2022

33

17

8

62

• Nov 28, 2024

• #5

in the aftermarket world of mis fits you use foam to stop air going around the core.a half inch gap can kill your heat when temps are in the teens.

 

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rfpowerdude

G-Body Guru

Jul 15, 2013

718

1,208

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Palm Bay, Fla

• Nov 28, 2024

• #6

gp471 said:

in the aftermarket world of mis fits you use foam to stop air going around the core.a half inch gap can kill your heat when temps are in the teens.

Click to expand...

Fortunately, I won’t have to worry about temps in the teens here on the SpaceCoast…🥳

 

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Ugly1

Royal Smart Person

Oct 26, 2021

2,063

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Lost in the woods of NH

• Nov 29, 2024

• #7

If (and it does happen!) you get a whistle sound after the install it’s the fluid going through to fast or there is a small amount going between the two sides. ( I was never told exactly which) but there is an insert that goes in the hose like a reducer and helps eliminate the problem. Even the factory did this!

 

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