74 monte carlo a/c evaporator

by Hawkeye Fri Dec 15, 2017 1:03 am

I'm looking for a new 1974 a/c evaporator for a monte carlo. appreciate your help for locating

by Lovett Fri Dec 15, 2017 8:01 pm

I purchased one for my 1973 Chevelle from www.oldairproducts.com Quality and fit was very good, thinking the price was around $300 a few years ago.

by g3chevy / Mr Pontiac Fri Dec 15, 2017 8:30 pm

Here's an evaporator that will fit your Monte. I would also consider upgrading your evaporator to a 1977 version that uses an orifice tube and eliminates all the moving parts found in our VIR systems. In place of it will be an accumulator that is typically $30. The second link is for 77 Monte Carlo Evaporator which is considerably less expensive and more reliable.

https://www.ebay.com/itm/74-75-76-Buick-Century-Regal-Evaporator-Core-Coil-Air-Conditioning-GM-New-EC6220/262744395010?hash=item3d2cc94d02:g:9akAAOSwnHZYQNcR&vxp=mtr

https://www.ebay.com/itm/ACDelco-15-6249-A-C-Evaporator-Core/182228780504?fits=Year%3A1977%7CModel%3AMonte+Carlo&epid=193188348&hash=item2a6dae85d8:g:ai4AAOSwIgNXoMtd&vxp=mtr

by Hawkeye Sat Dec 16, 2017 1:14 pm

thank you for the follow up!

by g3chevy / Mr Pontiac Sat Dec 16, 2017 3:05 pm

And I also forgot that Rock Auto carries the 77 evaporator for only $66.79. Here's the link. I did this upgrade on the 75 Laguna last summer and it works great. Fits into your existing A/C box with very minor modifications.

http://www.rockauto.com/en/catalog/chevrolet,1977,monte+carlo,5.7l+350cid+v8,1055898,heat+&+air+conditioning,a/c+evaporator+core,6768

by Podor Sat Dec 16, 2017 11:57 pm

Good info! Do you have to do anything with that lines?

by g3chevy / Mr Pontiac Sun Dec 17, 2017 1:20 am

Yes, forgot that part. You will have to use hoses from a 77 to make it work. Otherwise you can use an original evaporator that's correct for a 74-76 A/C system and use the VIR eliminator kit. This is a step up from the original system but not as good as 77 setup as it does not utilize an orifice tube but uses a metering block. I was fortunate enough to have a complete A/C system I pulled off of a 77 El Camino I parted out a few years back so the only expense I had was purchasing a new accumulator and orifice tube. Everything went together without any issues. Below is a link to the VIR eliminator kit if you decide to that route. Also, below is a pic of my A/C system on my Laguna for reference.

https://www.ebay.com/itm/74-76-EL-CAMINO-MONTE-CARLO-A-C-134a-VIR-ELIMINATOR-UPGRADE-KIT-AC-Air-Condition/400281667590?hash=item5d32a58806:g:3L4AAOSwPcVVge6U&vxp=mtr

74 monte carlo a/c evaporator 20170610

by Podor Sun Dec 17, 2017 11:24 am

I didn't realize that the VIR didn't play well with 134A. I had a '74 in high school, just before R12 was sky high. When I wrenched, we used to do 134A conversions that was basically a new receiver/dryer or accumulator and new fittings. I'm pretty sure we didn't do anything as old as our cars though. I have a '77 now. Great info!

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74 monte carlo a/c evaporator

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