....I have NO engine lid seal....
I know from experiance that if you forget to latch your engine lid on a type 1 powered 73 bus and run down the road at 55, it's suck all the hot air and exhuast coming from under the rear bumper right back up into the engine compartment . . . and unless it's really cold outside, it will run hot. I don't know for a fact, but I'd bet that no seal would be about as bad.