Heat from front corners??

AlB · 08-19-2007, 10:00 PM

I noticed that after I drive there is QUITE a bit of heat coming thru the sheet metal on the fenders just behind the reflectors. Even after VERY short drives with or without headlights on. ANyone know what is under there driving the temp. Its almost too hot to touch?!!!

Spool · 08-19-2007, 10:08 PM

it's normal, cars create heat when they operate.

533ogetnom · 08-19-2007, 10:11 PM

yea theres a bunch of explosions going on under there man

drexplode · 08-19-2007, 10:14 PM

engine heat + brake rotor heat its normal, dont worry about it unless you see flames. Then thats bad.

Tag · 08-19-2007, 10:16 PM

Yup, approximately 70% of the energy generated from your 6 banger is lost in heat.

drexplode · 08-19-2007, 10:17 PM

mmm 335 direct injection is mucho better-o (yes i speak spanish)

BK · 08-20-2007, 10:22 AM

Quote:

Originally Posted by Spool

it's normal, cars create heat when they operate.

Quote:

Originally Posted by 533ogetnom

yea theres a bunch of explosions going on under there man

Sorry to the OP, but these responses cracked me up.

FWIW, the E90 generates a hell of a lot more heat than most cars I've driven, and the engine bay stays warmer longer.

achien · 08-20-2007, 10:26 AM

Talked to my CA, he says this is a new feature in 335i to allow you to cook your steak & eggs on the car while you are on the run.

Quote:

Originally Posted by AlB

I noticed that after I drive there is QUITE a bit of heat coming thru the sheet metal on the fenders just behind the reflectors. Even after VERY short drives with or without headlights on. ANyone know what is under there driving the temp. Its almost too hot to touch?!!!

LEDZEP · 08-20-2007, 11:39 AM

Quote:

Originally Posted by 533ogetnom

yea theres a bunch of explosions going on under there man

They are actually very rapid controlled burns, not explosions.

But either way, yeah - they tend to emit heat.

hotrod2448 · 08-20-2007, 11:52 AM

The engine bay in these cars definitely seem to keep more heat in them than any other car I've ever owned.

I've thought about this before and I wonder how quickly the rubber and plastics under the hood will degrade because of this? If I recall the last gen RX-7's had a big problem with the heat under the hood cooking and cracking vacuum lines. Hell, the engine bay in my Evo didn't seem get this hot or stay hot for nearly as long as this car does.

I have to think that if we vented the engine bay a little better either through evacuators in the hood (like M3 GTR hood) or modifying the undertray to draw more out of the engine bay if we would see a noticeable difference in engine bay temps and maybe even in engine temps.

Zirenz2006 · 08-20-2007, 11:59 AM

Quote:

Originally Posted by Spool

it's normal, cars create heat when they operate.

De90man · 08-20-2007, 12:21 PM

Quote:

Originally Posted by tag824

Yup, approximately 70% of the energy generated from your 6 banger is lost in heat.

Heat/Inefficiency...crazy that BMW engineers had to design a system that actually has to cool 900+hp in a relatively small space. The Veyron has to cool 3000hp (10 radiators then)

So the heat you felt are the horses that got away

E90330iS · 08-20-2007, 12:24 PM

Yup, the M3 grilles really help cool the engine bay a lot!

cooljoe164 · 08-20-2007, 12:43 PM

If you look at in in a physics perspective, as long as you start and stop at the same elevation, 100% of the energy is lost as heat. Either from the engine, brakes, drivetrain, air resistance, rolling resistance from tires, speakers vibrating the air, lights, etc. As air rolls over the car, it "bumps" other air molecules and creates heat. Tires heat the air inside them, the track, and the rubber itself.

No wonder global warming's a huge issue.

tctic · 08-20-2007, 01:05 PM

Quote:

Originally Posted by cooljoe164

If you look at in in a physics perspective, as long as you start and stop at the same elevation, 100% of the energy is lost as heat. Either from the engine, brakes, drivetrain, air resistance, rolling resistance from tires, speakers vibrating the air, lights, etc. As air rolls over the car, it "bumps" other air molecules and creates heat. Tires heat the air inside them, the track, and the rubber itself.

No wonder global warming's a huge issue.

FYI, global warming is not because of heat production. The sun gives us more heat than anything else. Any sort of heat that we produce in a planet level is insignificant. What causes global warming is the CO2 (mainly) that traps heat from escaping into space via bouncing IR rays back to earth instead of emitting it out of the atmosphere.

Back on topic... there seems to be part of the hood that is warmer than others. (Like the part that the OP was describing) And the difference is quite distinct too.

Jose Ruiz · 08-20-2007, 03:42 PM

I have 325/06 Auto Trans, I think I can cook a steak midium well in minutes, I live in Puerto Rico and here gets real hot

Some times when I flame it, I open the hood for some time in my driveway.
I learn a lot from this forum and LOL with the funny replys in this thread.
Keep cool,
Jose

carl_lazlo · 08-20-2007, 04:28 PM

I noticed this same problem with my 335! I got so tired of it I decided to take a thick wool blanket and wrap the engine with it. Problem solved!!

thekurgan · 08-20-2007, 04:37 PM

Quote:

Originally Posted by AlB

I noticed that after I drive there is QUITE a bit of heat coming thru the sheet metal on the fenders just behind the reflectors. Even after VERY short drives with or without headlights on. ANyone know what is under there driving the temp. Its almost too hot to touch?!!!

My right front fender is warmer, maybe due to the location of the oil cooler.

hotrod2448 · 08-20-2007, 04:53 PM

Quote:

Originally Posted by thekurgan

My right front fender is warmer, maybe due to the location of the oil cooler.

or that the exhaust is on that side.

AlB · 08-20-2007, 10:04 PM

Please, none of you quit your day job...

If anyone is interested try putting you hand on the center of your hood after a 10 minute drive, now place it on the fender just abov/behind the crappy looking amber reflectors. at least twice as hot (hood is rather cool). I would expect hood and windshield area to be hotter that a relativley forward area such as the fenders

thekurgan · 08-20-2007, 10:11 PM

Quote:

Originally Posted by AlB

Please, none of you quit your day job...

If anyone is interested try putting you hand on the center of your hood after a 10 minute drive, now place it on the fender just abov/behind the crappy looking amber reflectors. at least twice as hot (hood is rather cool). I would expect hood and windshield area to be hotter that a relativley forward area such as the fenders

Go to the dealership and cry to them, not us.

AlB · 08-21-2007, 10:58 AM

Quote:

Originally Posted by thekurgan

Go to the dealership and cry to them, not us.

Wasn't crying SCHMUCK...just asking a question

08-19-2007, 10:00 PM	#1
AlB Private First Class 11 Rep 194 Posts Drives: 2006 330i MT gry/blk Join Date: Jun 2007 Location: SF iTrader: (1)	Heat from front corners?? I noticed that after I drive there is QUITE a bit of heat coming thru the sheet metal on the fenders just behind the reflectors. Even after VERY short drives with or without headlights on. ANyone know what is under there driving the temp. Its almost too hot to touch?!!! __________________ 06 330i gry/blk everything but iWreck, nav & pdc carbon splitters, door trim, grill, roof spoiler CDV delete, B&M Short shifter, cyba scoops
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08-19-2007, 10:08 PM	#2
Spool ****** 558 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	it's normal, cars create heat when they operate. __________________ MKIV 6spd 1000hp Club
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08-19-2007, 10:11 PM	#3
533ogetnom Banned 95 Rep 1,760 Posts Drives: 335coupe Join Date: Apr 2007 Location: Florida iTrader: (1)	yea theres a bunch of explosions going on under there man
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08-19-2007, 10:14 PM	#4
drexplode Brigadier General 1785 Rep 3,068 Posts Drives: G26 i4x Join Date: Jul 2007 Location: Walled Lake Michigan iTrader: (17)	engine heat + brake rotor heat its normal, dont worry about it unless you see flames. Then thats bad.
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08-19-2007, 10:16 PM	#5
Tag this is the way 18167 Rep 8,530 Posts Drives: N-1 starfighter Join Date: Jan 2007 Location: Chicago iTrader: (3)	Yup, approximately 70% of the energy generated from your 6 banger is lost in heat.
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08-19-2007, 10:17 PM	#6
drexplode Brigadier General 1785 Rep 3,068 Posts Drives: G26 i4x Join Date: Jul 2007 Location: Walled Lake Michigan iTrader: (17)	mmm 335 direct injection is mucho better-o (yes i speak spanish)
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08-20-2007, 11:52 AM	#10
hotrod2448 grand poobah 254 Rep 2,253 Posts Drives: F80 M3, F10 535i Join Date: Dec 2006 Location: Charlotte, NC iTrader: (0) Garage List 2011 335d [0.00]	The engine bay in these cars definitely seem to keep more heat in them than any other car I've ever owned. I've thought about this before and I wonder how quickly the rubber and plastics under the hood will degrade because of this? If I recall the last gen RX-7's had a big problem with the heat under the hood cooking and cracking vacuum lines. Hell, the engine bay in my Evo didn't seem get this hot or stay hot for nearly as long as this car does. I have to think that if we vented the engine bay a little better either through evacuators in the hood (like M3 GTR hood) or modifying the undertray to draw more out of the engine bay if we would see a noticeable difference in engine bay temps and maybe even in engine temps. Last edited by hotrod2448; 08-20-2007 at 12:29 PM..
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08-20-2007, 12:24 PM	#13
E90330iS Major General 143 Rep 6,333 Posts Drives: BMW M4 Join Date: Jan 2006 Location: Arcadia, California iTrader: (56) Garage List 2006 330i [0.00]	Yup, the M3 grilles really help cool the engine bay a lot! __________________ 2017 BMW M4 DCT Lease Transfer: https://f80.bimmerpost.com/forums/sh...8#post23736398
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08-20-2007, 12:43 PM	#14
cooljoe164 New Member 0 Rep 9 Posts Drives: E92 TiAg Black Leather, PP CWP Join Date: Mar 2006 Location: Morristown, NJ iTrader: (0)	If you look at in in a physics perspective, as long as you start and stop at the same elevation, 100% of the energy is lost as heat. Either from the engine, brakes, drivetrain, air resistance, rolling resistance from tires, speakers vibrating the air, lights, etc. As air rolls over the car, it "bumps" other air molecules and creates heat. Tires heat the air inside them, the track, and the rubber itself. No wonder global warming's a huge issue.
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08-20-2007, 03:42 PM	#16
Jose Ruiz New Member 0 Rep 6 Posts Drives: E90 2006 325 Auto Trans, Join Date: Aug 2007 Location: Guaynabo, Puerto Rico iTrader: (0)	Mine too! I have 325/06 Auto Trans, I think I can cook a steak midium well in minutes, I live in Puerto Rico and here gets real hot Some times when I flame it, I open the hood for some time in my driveway. I learn a lot from this forum and LOL with the funny replys in this thread. Keep cool, Jose
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08-20-2007, 04:28 PM	#17
carl_lazlo Doctor of Journalism 28 Rep 352 Posts Drives: E 92 335i Sapphire Black Join Date: Nov 2006 Location: Jersey iTrader: (0)	I noticed this same problem with my 335! I got so tired of it I decided to take a thick wool blanket and wrap the engine with it. Problem solved!!
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08-20-2007, 10:04 PM	#20
AlB Private First Class 11 Rep 194 Posts Drives: 2006 330i MT gry/blk Join Date: Jun 2007 Location: SF iTrader: (1)	Please, none of you quit your day job... If anyone is interested try putting you hand on the center of your hood after a 10 minute drive, now place it on the fender just abov/behind the crappy looking amber reflectors. at least twice as hot (hood is rather cool). I would expect hood and windshield area to be hotter that a relativley forward area such as the fenders __________________ 06 330i gry/blk everything but iWreck, nav & pdc carbon splitters, door trim, grill, roof spoiler CDV delete, B&M Short shifter, cyba scoops
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