I use CRC Lectra Clean. It's great. About $6 a can, but it dries almost
instantly, leaves no residue and according to the label has no flash point,
though I wouldn't use it on a hot engine. Goes a long ways, too. I bought 3
cans when my engine was real greasy and only used 2, but it was spotless.
There's enough pressure and one of those little straw type inserts to reall
get it where you want it.

If you have a compressor, get a cleaner nozzle (the kind with a bottle or
pickup tube) and use paint thinner. Also works great.

My A&P suggested cleaning the engine with one of these and then powdering
the engine around the suspected leak area, fly it for a while adn look for
the leak in the powder. I didn't need to do this to find my leak, but it
sounds good.

mike regish

"Robert M. Gary" wrote in message
om...
Looks like I've got an oil leak in my 550 hr SFNEW IO-360-A3B6
Lycoming engine. My mechanic says I should clean the engine and see
where its coming from. I feel strange cleaning the engine. He said to
use an automotive engine cleaner and then wash it off right away. I
guess its not different than flying through a level 5 rain shower but
I can't see spraying my mags down with a hose. How do most of you do
it?