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Old 06-18-2017, 07:01 PM
CruisinginStyle CruisinginStyle is offline
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Location: New Jersey
Join Date: Jun 2017
Posts: 1
Mein Auto: BMW 340 Xi
Hood is Extremely Hot

I have a 340 Xi and notice that the hood is extremely hot when I turn the car off. I may drive around for 20 minutes, not doing anything crazy or even lighting it up at all. Anyone have any ideas as to why the hood is burn-hot to the touch-- there is no high temperature alert or indication of any sort, not overheating or anything. Would this be normal with a twin turbo engine to have a scorch hot hood, even despite a casual drive, no high speed and for 20 minutes? I am new to the BMW family...any and all input welcome...
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Old 06-18-2017, 07:49 PM
carstrucksbuses carstrucksbuses is offline
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Location: USA
Join Date: Feb 2017
Posts: 15
Mein Auto: 328xDrive
Yup, they make short work of heating the garage in the winter, and make it super hot in the summer- beauty of the beast. I've opened the hood on occasion to cool it down before I close the garage door if I plan to work in there or on the car..
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Old 06-19-2017, 08:23 AM
John MS John MS is offline
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Location: Virginia, USA
Join Date: Oct 2014
Posts: 1,720
Mein Auto: 2014 Glacier Silver 328i
Things that can make any car hood hot. Including BMW.
1. Running the engine. The engine, coolant and oil radiators, exhaust system, air conditioning condenser and catalytic converter all radiate heat under the hood.
2. Tight under-hood space can trap heat.
3. Solar heat warms up the hood.
4. A darker colored hood will absorb more heat.
5. Radiated road heat.

Last edited by John MS; 06-19-2017 at 08:26 AM.
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Old 06-19-2017, 12:55 PM
VCuomo VCuomo is offline
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Location: SoCal
Join Date: Feb 2015
Posts: 384
Mein Auto: 335i Sport 8AT Sedan
Yep, shocked me the first weekend I had the car. I had to take it in the following week for a service that was planned at the time of purchase, and I asked the service advisor about it. He laughed and said that a lot of people who are new to the 3 Series ask about it and that it's normal. He said the turbos radiate a lot of heat and when you shut the car off and let it sit that heat is picked up by the aluminum hood and it gets [really] hot.
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