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Hi everyone,
2017 Z51 2LT M7 with 10k miles. Located in south carolina. Completely stock.
I was running errands in my car for less than an hour yesterday. When I came back and parked in my garage, I heard a drip / sizzle pattern coming from the car. I went and looked under and could see the clear liquid dripping. I took the below photos and video
If it matters, I just had the a leaking tensioner / pulley replaced at a dealership. I am also a few days away from another service appointment to install an AC compressor. They said the clutch was bad with the AC; The AC was rarely ever "cold", unless I had it on full blast. I realize I should just tell the folks at the dealership when I bring it in, but wanted to run it by you all too. Thank you in advance.
If the AC compressor is bad, how could the AC system be producing condensation?
The evaporator needs to really get cold to produce that amount of water.
I'd look further into it before just throwing a compressor at it.
I'm not 100% sure I understand what the dealership explained for what was wrong on the AC but they mentioned the clutch is not engaging and that the AC would only blow cold at higher RPMs. It's all covered under a 3rd party warranty so I sorta stopped asking questions. The AC works on full blast but it's not ice cold but colder than cool if that makes sense.
The evaporator on any vehicles HVAC system will drip condensation aka water. For design reasons unknown to me, the C7 points it directly at the exhaust.
The evaporator on any vehicles HVAC system will drip condensation aka water. For design reasons unknown to me, the C7 points it directly at the exhaust.
Will this exacerbate rust? I would think so, right?
-Ken
No, there is little to rust in that area other than a few bolt heads.
The reason it is dripping so profusely is you are running it on high pulling more humid air through the evaporator, that creates more condensation which then drips on the stainless steel exhaust and your garage floor. A bad AC clutch can act like a bad drivetrain clutch in that it slips limiting engine torque to the compressor. You should be all set with a new compressor. Gone are the days when we could just replace the compressor clutch. It is all one unit today making it a much more involved job.
Will this exacerbate rust? I would think so, right?
-Ken
I'm on long tube headers made from stainless with ceramic coating, so it hadn't crossed my mind. It steams off so quickly due to the exhaust being at operating temp that I don't think it will cause issues.
My C5; C6s and C7 all have done the same thing.
Leaking liquid from under engine
