Screws on the tins..., Tricks? Options

[Tjmrfe]

Hey Gents,
In the “well this isn’t fun category” (IMG:style_emoticons/default/headbang.gif)
I’m taking the tin’s off my 1.8... (Who’s bright idea was it to use flat head screws?)
So far, the ones going into the block are frozen...Should I apply heat?
On the exposed ones, a little nut buster and some heat they came right off, I’ve tried tapping with a hammer and a screwdriver, to no avail....
But, I’m apprehensive about using heat with ones that go into the block? Should I be?
As always, thanks in advance...

[mepstein]

Don’t be afraid to get it HOT. We use MAP gas to loosen up the area around the head studs on 911 engines. 2-3 minutes of direct flame on the aluminum or magnesium case. Your not going to hurt it and I think it’s easier on the threads to remove the hardware once the corrosion has loosened and the threads are lubricated than to try to remove dry. I happen to like using paraffin once the metal is hot. Instead of evaporating off, the heat wicks it into the threads and lubes them. I’ve used old candles with better success than the popular penetrating oils.