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Disconnect AC and Heater Lines

5:20
26:49
47.5K views

At 5:20 in

GMT400 Suburban Frame Off Build: Body Removal & Getting Ready for Frame Paint! (What To Remove)

What happens here

The creator initially thought the AC and heater lines would need to be disconnected by releasing them from the body, but upon closer inspection, he realizes they have quick-disconnect fittings behind rubber boots near the frame rail. He uses a screwdriver to push the internal collar, along with some WD-40, to release the lines, which results in a significant coolant leak. He then collects the leaking coolant in a bucket. He mentions using two wrenches for the remaining connections.

Goal: Detach AC and heater lines from the body for removal

Tools and materials

  • AC Lines — Lines carrying refrigerant for the air conditioning system
  • Bucket — Collecting leaking coolant
  • Heater Lines — Lines carrying coolant for the heater core
  • Penetrating Oil WD-40 — Lubricating quick-disconnect fittings
  • Screwdriver — Pushing the internal collar of quick-disconnect fittings
  • Wrenches — Disconnecting remaining AC/heater line connections

What they say

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here back here is the rear AC evaporator thing and the rear heater core that's these lines are this is like the coolant for the heater core and the AC ones and I thought we were going to have to disconnect these to get the body off and then I realized oh man we're going to have to like take the whole line out cuz it's anchored to the body the whole way and then I was like it's anchored to the body the whole way maybe it comes apart somewhere so it can stay on the body for service so you trace it up here follows The Rocker the whole way down and then it makes a pass through this will be the problem area and behind this rubber boot here is a disconnect may not even need a special tool for this I don't know they got these plastic inner collar you push it in kind of put some WD40 in there and moved it around and it freed it up it may leak a little bit I don't know oh my God yeah see yeah I kind of thought about that cuz whenever you drain the engine it just drains out but this is a separate low point and all of that up there would be holding uh fluid too here we go that really not much collateral damage in the nest Department I'm I'm happy with that are you yeah I'm wipe this off my arm so I don't end up with coolant in my armpit cuz I don't need to make this any worse and lower it down a little bit and do those but with two wrenches this time so this tiny line is 3/4 and 5/8 right here and I'm going to teach you a trick that I didn't learn until a couple months ago where you can you can Orient the wrenches however you want I mean you could do it like this and then be like you know jerking on it whatever but if you put them in a way to where the way you want it to go you can squeeze the them and then you have a ton of Leverage on it and it works much better that way but don't put your thumb in between here that would be bad well apparently they weren't even

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