Paculdo

would it be a problem for the engine to get wet - say when it rains (or getting the car washed)? does it really helps to cool the engine? or purely for style?

jsc1234

no water doesnt go in even on pouring rain. i had dad's vented hood and drove and parked in the rain no problem no water in the engine

Maverick1975

Ditto

RNS-11Z

Did you guys notice reduced temps?? Oil or water?


H

jsc1234

it was the same for me just took longer to warm up and was faster to cool down

SonnyakaPig

Water hasn't caused any problems because of my hood. And I've driven and parked in some rain.

SonnyakaPig

I don't know. But, it sure doesn't hurt. I drive in crazy heat and my temps look great.

bluejae

i've got dads cf hood as well... no rain problems whatsoever

temps have gone down a couple degrees... what i noticed right away after installing the new hood was that the oil temp would fluctuate up and down a lot... i can only assume it's because of the vents... with the stock hood, the numbers may go up and down but very slowly... sometimes pretty steady... the vents definitely gives the temp gauge a workout =)

SonnyakaPig

How much do your temps fluctuate? Like +/- 5 degrees, 10 degrees, 40-50 degrees? Reason I ask is because my temps bounce around every time I press on the throttle and they fluctuate as much as 50 degrees. But, this has been going on way before I put on the hood.

bluejae

yeah.. i've read how some people have had that problem... but with my 2009 and my current 2010, i never had that issue...

i live in texas and been through a few summers in both cars... but they never fluctuated like the way some has described... i'm not sure what the problem is... maybe bad placement of the temp gauge... who knows...

i've never seen mine fluctuate that much... 50F is crazy... i'm talking 5F and under...

just as an example... i'll start at like 220F

stock - 220F (maybe 20-30 seconds or a minute) -223F - (again after a short time) - 220F

vented hood - 220F ( few seconds later) 223F (few seconds later) 220F (seconds) 218F

but the general median is a little lower with the vented hood... not drastic... but i think it improves as the car is moving

SonnyakaPig

Very cool. Thanks for the feedback.

Yeah, mine is a mystery at this point. The dealership ran a diagnostic and sent the results to AMG for review. We're going to get to the bottom of this at some point.

justthebest

I have three vehicles with functional hood vents (just realized that as I typed it), and all the vents are OEM. If having water get in / on the engine due to vents was an issue, I don't think Ford or MB would have put them there (not being sarcastic).

Paculdo

^^ i think for OEM no big deal (or no issues to worry about).. as you said, the manufacturer wouldn't put 'em there just for style points :-)
i'm more asking about for aftermarket hoods.. there's another post asking about having a BS hood to fit on a 08-11 models.. does the engine bay of the BS differ to the 'common' c63?
i guess my next question is: there are different aftermarket hoods with different placements of vents.. does it matter where (the vents) are placed?
the hood, engine bay on this car really heats up and (and takes longer) to cool down when i park it in the garage.