Later Model AC?
Here's my situation: I'm putting my Blazer back together, and I discovered there was a huge hole in the hard line to the evaporator. The new engine is an L31 with serpentine brackets from a 98 Silverado. I had planned to use the condenser and compressor from a 2001 Express 3500 van that's volunteered to be an engine donor for another project. I know it's a long shot, but... has anyone ever used the evaporator from a later model Chevy in a 72 with factory air?
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Re: Later Model AC?
A 1987 evaporator fits well in the original box.
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Re: Later Model AC?
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Is it necessary to change the evaporator when updating the compressor and condenser? I am doing an LS3 swap in my 1972 Blazer and will be using a sanden S7 compressor and swapping to 134 refrigerant. The reason I ask is I bought an NOS evaporator and would like to use it? |
Re: Later Model AC?
I’ve also used a square body evap. Fits well, but slightly smaller so you have to make a small spacer inside the case.
I would think the POA elimination would be the way to run the factory evap with a newer compressor on an LS swap. I suppose you could run a POA since it cools great, but I don’t know how that compressor would like a 100% duty cycle. |
Re: Later Model AC?
Excellent! I just looked it up - $50 vs $300 for a 72 evaporator. Building a spacer should be simple.
Thanks so much! |
Re: Later Model AC?
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Re: Later Model AC?
I looked up an 87. I also looked up a 98 - it looks close enough to work as well.
So that brings up a question - I have a 98 Silverado and a 2001 Express 3500. Both have the Vortec 5.7 with serpentine (the setup I put in my Blazer) but the 98 has an orifice tube and the 01 has an expansion valve. Which one works better? |
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