How to clean exterior Evaporator Core - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 03-27-2016, 07:11 PM

I'm asking...ha!......

Seems water, degreaser, a brush and blow dryer are the ticket, but I thought to ask before I do something I shouldn't. Thanks.

F.A.A.benny · 03-27-2016, 08:56 PM

That's one way to do it

SS Tim · 03-27-2016, 11:42 PM

GM has a really great evaporator dip cleaner we used for problem cars that was not only a cleaner but a anti-growth protective coating as well. Try you local dealer for more current information and what it would cost you.

F.A.A.benny · 03-28-2016, 04:06 AM

The first thing I do is use compressed air to blow out as much of the crap in between the fins as possible.

lugnuts09 · 08-11-2017, 10:06 PM

What's the best method of cleaning this? Trying to overhaul the A.C system and replace the heater core.

**HO455** · 08-11-2017, 10:55 PM

There are lots of coil cleaning products out there. Here is a list from Grainger.

https://www.grainger.com/category/co...leaner&sst=All

Bigdav160 · 08-12-2017, 08:30 AM

When I see an oily spot, like on the upper right corner of Lugnuts evaporator, I think "leak".

lugnuts09 · 08-12-2017, 10:49 AM

I've never really worked on an a.c. system before. It hasn't been hooked up since before I bought the truck. They even bypassed the heater core. I sure hope it's not a leak. All of your input is greatly appreciated.

F.A.A.benny · 08-12-2017, 05:24 PM

Quote:

Originally Posted by lugnuts09

I've never really worked on an a.c. system before. It hasn't been hooked up since before I bought the truck. They even bypassed the heater core. I sure hope it's not a leak. All of your input is greatly appreciated.

It should flushed and pressure tested. I would not install an evaporator without pressure checking. I know some guys do take that risk but these evaps can look brand new from the outside and be corroded from the inside. Never know for sure until it's pressure tested

F.A.A.benny · 08-12-2017, 05:26 PM

Also I'd remove the expansion valve to flush and pressure check

lugnuts09 · 08-12-2017, 06:59 PM

What type of shop can I get that done at?

F.A.A.benny · 08-12-2017, 07:59 PM

Quote:

Originally Posted by lugnuts09

What type of shop can I get that done at?

Not sure but if you can't find one, you can send it to me..I do this all the time

03-27-2016, 07:11 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,322	How to clean exterior Evaporator Core I'm asking...ha!...... Seems water, degreaser, a brush and blow dryer are the ticket, but I thought to ask before I do something I shouldn't. Thanks. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-27-2016, 08:56 PM	#2
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: How to clean exterior Evaporator Core That's one way to do it

03-27-2016, 11:42 PM	#3
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: How to clean exterior Evaporator Core GM has a really great evaporator dip cleaner we used for problem cars that was not only a cleaner but a anti-growth protective coating as well. Try you local dealer for more current information and what it would cost you. __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

03-28-2016, 04:06 AM	#4
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: How to clean exterior Evaporator Core The first thing I do is use compressed air to blow out as much of the crap in between the fins as possible.

08-11-2017, 10:06 PM	#5
lugnuts09 Registered User Join Date: May 2016 Location: Imperial Beach, Ca Posts: 18	Re: How to clean exterior Evaporator Core What's the best method of cleaning this? Trying to overhaul the A.C system and replace the heater core. Attached Images

08-11-2017, 10:55 PM	#6
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: How to clean exterior Evaporator Core There are lots of coil cleaning products out there. Here is a list from Grainger. https://www.grainger.com/category/co...leaner&sst=All __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

08-12-2017, 08:30 AM	#7
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: How to clean exterior Evaporator Core When I see an oily spot, like on the upper right corner of Lugnuts evaporator, I think "leak". __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

08-12-2017, 10:49 AM	#8
lugnuts09 Registered User Join Date: May 2016 Location: Imperial Beach, Ca Posts: 18	Re: How to clean exterior Evaporator Core I've never really worked on an a.c. system before. It hasn't been hooked up since before I bought the truck. They even bypassed the heater core. I sure hope it's not a leak. All of your input is greatly appreciated.

08-12-2017, 05:26 PM	#10
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: How to clean exterior Evaporator Core Also I'd remove the expansion valve to flush and pressure check

08-12-2017, 06:59 PM	#11
lugnuts09 Registered User Join Date: May 2016 Location: Imperial Beach, Ca Posts: 18	Re: How to clean exterior Evaporator Core What type of shop can I get that done at?

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