[DML] Re: Engine cover screens - necessary or not?

["Welmoed" <welmoedj@xxxxxxxxx>]

Although I'm not an engineer, I feel the openings in the engine cover are there for a reason.
In school we have learned that hot air rises.
It doesn't need any force as it is nature.

So when a car idle hot air can go away (in our D) but is more or less stuck under the hood/bonnet of a front engine car.

While driving a front engine car's engine gets better cooling as the air - forced by speed - travels along the engine and helps cooling. Hot air in such engines leaves the engine bay and travels underneath the car towards the rear.

In a D the rear engine is handicapped regarding the air as the air is being somewhat forced by the car's speed, but travels underneath the car beyond the deflector shields. At that point the hot air from the engine moves up (natural law) and creates a kind of under pressured area making the colder air rise and follow the hot air.
If there wouldn't have been openings in the engine cover all hot air would be trapped causing a build-up of heat and making it harder for the engine to keep "it's cool".

Covering the holes in the engine cover therefore IMO more hinder cooling than help.

If you look at modern mid-engine designs you often find extra vent openings or fans to assist the fluid cooling system of such cars.
Of course those engiens usually are far more powerful than the one in our D but nevertheless one should not obstruct cooling only because it may cause water to enter the engine bay from above.

If that's your only concern, I would consider buying a car cover or a cover for the engine (louvre/engine cover) itself.
The other option: parking a car inside (garage) to keep it dry, is not always possible for oldtimer owners.

Welmoed.


--- In dmcnews@xxxxxxxxxxxxxxx, "Tom" <dmctom@...> wrote:
>
> Hello everyone,
> 
> Has anyone ever tried to get rid of the screens in the engine cover?
> Does the car really need them? Are they necessary?
> I'm sure it will raise the engine compartment temperature a little but is it something that will actually make a difference? Most cars do not have any vents in their engine covers so why would a DeLorean need them?
> I'm just wondering as I hate to see the engine get all wet every time it rains. I don't like the idea of water dripping right on the belts and corroding the A/C clutch. And I'm sure you all know about water getting into the throttle cable and then freezing.
> So, the idea is to just remove the screens and fill in the holes. What do you think?
> 
> 
> Greetings from Poland!
> Tom Niemczewski
> Vin 6149 plus 2418, 3633, 5030, 16473, 17086
> Google earth: 52°25'17.66"N, 21° 1'58.40"E
> 
> [Non-text portions of this message have been removed]
>




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