Sizzling Sound From C7 Engine
08-01-2017, 10:37 PM
#1
Cruising
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Sizzling Sound From C7 Engine
Picked up my first Corvette last month, a 2018 Z51. Not sure if what I'm experiencing is normal for Corvettes. After parking the car I hear a sizzling sound like water droplets hitting a hot stove. I didn't notice this the first couple of weeks, but do now every time I park. Today's drive home was 45 minutes cruising at interstate speeds. The sizzling was noticeable for a couple minutes after turning off the engine. It was intermitent and eventually stopped. AC was running the whole drive home. I looked under the hood to see if I could see anything, but couldn't. I expect it's AC condensation hitting hot engine parts, but I was struck by how hot the engine was. Much hotter than my Sierra V8 after a similar drive. I've been keeping an eye on the engine temp and it's staying in the 190-200 degree range. Anyone else experience this or know if it's normal?
08-01-2017, 10:42 PM
#3
Race Director
My GS does same, I assume it's the AC condensation dripping down on the manifold pipe.
08-02-2017, 01:36 AM
#5
Burning Brakes
This is normal, mine does it too. I do wonder if they knew this was going to happen when they designed it.
08-02-2017, 01:51 AM
#6
Le Mans Master
I guess if it really bothers you, you could always extend a tube from the A/C drain to where it does not fall on the exhaust. Then you have to worry about the drain stopping up.
Last edited by TEXHAWK0; 08-02-2017 at 01:52 AM.
08-02-2017, 03:19 AM
#7
My GS was doing that and it's no big deal...But even though it's fine, it makes me "think" something is wrong....So I just turn the AC off a few minutes before I get home...no more sizzle....magic.
08-02-2017, 05:16 AM
#8
Le Mans Master
This is normal. My C6 did the same thing. I just wonder why they did not bother to design a known problem out of the C7?
08-02-2017, 07:39 AM
#9
Corvette Enthusiast
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The goal is to eliminate the "spot" on the ground caused by condensation. The story goes some executive didn't like wet spots in his garage.
08-02-2017, 08:13 AM
#10
Instructor
Mine too does this when I come home and park.
08-02-2017, 02:07 PM
#11
Team Owner
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
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Picked up my first Corvette last month, a 2018 Z51. Not sure if what I'm experiencing is normal for Corvettes. After parking the car I hear a sizzling sound like water droplets hitting a hot stove. I didn't notice this the first couple of weeks, but do now every time I park. Today's drive home was 45 minutes cruising at interstate speeds. The sizzling was noticeable for a couple minutes after turning off the engine. It was intermitent and eventually stopped. AC was running the whole drive home. I looked under the hood to see if I could see anything, but couldn't. I expect it's AC condensation hitting hot engine parts, but I was struck by how hot the engine was. Much hotter than my Sierra V8 after a similar drive. I've been keeping an eye on the engine temp and it's staying in the 190-200 degree range. Anyone else experience this or know if it's normal?
08-02-2017, 02:12 PM
#12
Racer
08-02-2017, 04:22 PM
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St. Jude Donor '05
Mfrs been doing that forever, think its so people dont freak out about a "bad leak every time I drive it" the exhaust takes care of it