My 2021 C63s is hot, hot, hot!
Thread Starter
Senior Member
Joined: May 2015
Posts: 342
Likes: 91
From: Florida
GLE400, 2017 Porsche 911S
My 2021 C63s is hot, hot, hot!
Literally speaking. I pull my car into the garage after short 5-10 mile trips and I must say, that V-8 power plant sure heats up my garage! I am sure it is running at normal temperatures but that engine compartment gets hot. I can totally see the need for all of the "heat shields" MB uses. I went out to the garage about 45 mins after coming back from picking up dinner and I opened the hood just to peak around. I put a little water on my finger and touched one of the turbos only to find it was still hot enough to sizzle the water. I wonder if these engines do run hotter? I'm sure it isn't the case but you would think this amount of heat would take it's toll on the longevity of some of the non-metal components in the engine compartment.
Senior Member
Joined: Sep 2019
Posts: 340
Likes: 82
2019 C63S Sedan
It does get hot but its all normal.
I can go out for a drive until the car gets to normal operating temperature (once the temp numbers turn white) then do one 1st to 2nd half throttle pull, drive around for another 5 to 10mins go home switch car off and the fans are blasting for another 5mins or so.
I can go out for a drive until the car gets to normal operating temperature (once the temp numbers turn white) then do one 1st to 2nd half throttle pull, drive around for another 5 to 10mins go home switch car off and the fans are blasting for another 5mins or so.
MBWorld Fanatic!
Joined: Dec 2012
Posts: 1,537
Likes: 372
From: Austin, TX
2017 Porsche 911 C4
Next time touch the turbine housing, you may need a skin graft after that 
It was normal practice for me to pop the hood open after parking in the garage after spirited driving - I don't like the idea of keeping all that heat contained in the engine bay, baking away electrical components and sensors. It's not unheard of for turbine housings and EGT's to reach as high as 1800-2000F, so you can imagine it takes quite a while to cool down after shutting down the engine.
It was normal practice for me to pop the hood open after parking in the garage after spirited driving - I don't like the idea of keeping all that heat contained in the engine bay, baking away electrical components and sensors. It's not unheard of for turbine housings and EGT's to reach as high as 1800-2000F, so you can imagine it takes quite a while to cool down after shutting down the engine.
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,343
From: San Francisco Bay Area
2019 C63CS
It does get hot, but not nearly as hot as my last car, which pretty much turned my garage into a sauna and eventually leaked coolant due to dried out and cracked hoses. I do however not recommend you touch the turbochargers ever, unless you plan a visit to your local burn unit afterwards. As mentioned above, depending on how hot the turbos are, the fan can run for up to 10 minutes and it actually blows out most of the heat under the car and towards the rear, so I always leave my garage door open until the fan stops. Doing this blows most of the heat out into the environment.
The heat is concentrated to the Hot-V in this engine away from vital parts. That's where the exhaust manifold is along with the turbos. The sides of the engine actually stay fairly cool, because that's where the air intakes are. This is the opposite of a traditional engine design which has the intakes at the top and the exhausts on the side.
It's always a good idea to do a "cooldown lap" after hard driving, though, to let everything cool down while the car is moving and the fluids are circulating. If and when you'll attend your complimentary AMG Driving Academy day, they'll tell you to let the engine running and release the parking brake, so the fluids keep circulating during driver changes and breaks and the rear pads don't imprint on the rotors. If you can get it to where the fan doesn't come on after parking the car then you have done a good cooldown. Most of my hard driving is at least an hour from my house, so the car has plenty of time to cool down at highway speeds. It doesn't take much, though, to heat up the turbos and have the fan run afterwards if I do a quick spurt near my house.
The heat is concentrated to the Hot-V in this engine away from vital parts. That's where the exhaust manifold is along with the turbos. The sides of the engine actually stay fairly cool, because that's where the air intakes are. This is the opposite of a traditional engine design which has the intakes at the top and the exhausts on the side.
It's always a good idea to do a "cooldown lap" after hard driving, though, to let everything cool down while the car is moving and the fluids are circulating. If and when you'll attend your complimentary AMG Driving Academy day, they'll tell you to let the engine running and release the parking brake, so the fluids keep circulating during driver changes and breaks and the rear pads don't imprint on the rotors. If you can get it to where the fan doesn't come on after parking the car then you have done a good cooldown. Most of my hard driving is at least an hour from my house, so the car has plenty of time to cool down at highway speeds. It doesn't take much, though, to heat up the turbos and have the fan run afterwards if I do a quick spurt near my house.
Last edited by superswiss; May 20, 2021 at 01:07 PM.
Super Member
Joined: Aug 2019
Posts: 881
Likes: 300
AMG GLC 63s Coupe
It does get hot, but not nearly as hot as my last car, which pretty much turned my garage into a sauna and eventually leaked coolant due to dried out and cracked hoses. I do however not recommend you touch the turbochargers ever, unless you plan a visit to your local burn unit afterwards. As mentioned above, depending on how hot the turbos are, the fan can run for up to 10 minutes and it actually blows out most of the heat under the car and towards the rear, so I always leave my garage door open until the fan stops. Doing this blows most of the heat out into the environment.
The heat is concentrated to the Hot-V in this engine away from vital parts. That's where the exhaust manifold is along with the turbos. The sides of the engine actually stay fairly cool, because that's where the air intakes are. This is the opposite of a traditional engine design which has the intakes at the top and the exhausts on the side.
It's always a good idea to do a "cooldown lap" after hard driving, though, to let everything cool down while the car is moving and the fluids are circulating. If and when you'll attend your complimentary AMG Driving Academy day, they'll tell you to let the engine running and release the parking brake, so the fluids keep circulating during driver changes and breaks and the rear pads don't imprint on the rotors. If you can get it to where the fan doesn't come on after parking the car then you have done a good cooldown. Most of my hard driving is at least an hour from my house, so the car has plenty of time to cool down at highway speeds. It doesn't take much, though, to heat up the turbos and have the fan run afterwards if I do a quick spurt near my house.
The heat is concentrated to the Hot-V in this engine away from vital parts. That's where the exhaust manifold is along with the turbos. The sides of the engine actually stay fairly cool, because that's where the air intakes are. This is the opposite of a traditional engine design which has the intakes at the top and the exhausts on the side.
It's always a good idea to do a "cooldown lap" after hard driving, though, to let everything cool down while the car is moving and the fluids are circulating. If and when you'll attend your complimentary AMG Driving Academy day, they'll tell you to let the engine running and release the parking brake, so the fluids keep circulating during driver changes and breaks and the rear pads don't imprint on the rotors. If you can get it to where the fan doesn't come on after parking the car then you have done a good cooldown. Most of my hard driving is at least an hour from my house, so the car has plenty of time to cool down at highway speeds. It doesn't take much, though, to heat up the turbos and have the fan run afterwards if I do a quick spurt near my house.
May garage has AC so I will pop the hood and let it cool when it is crazy hot.
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,343
From: San Francisco Bay Area
2019 C63CS
Yes, they still cool down significantly considering that the turbos and exhaust can reach temperatures to the point where they start glowing, so 110 is a cool breeze. Even the brakes can reach temps of 600-800 degrees. It's vital to do cool down to bring those temps down to something more normal before parking the car. I generally emerge from the canyons with TPMS showing my front tires orange or red, which means the brakes and tires are really hot and driving casually for a while will bring those temps down even if the ambient temps are above 100. It's not just the engine that needs cool down.
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