would it be safe to use seafoam in the crankcase of my 2001 s60 turbo,
it has 244,000 miles on it. would it help clear a possible clogged flame trap?

 

Hello, If by "flame trap" you mean the breather box (located beneath the intake manifold) and related tubing I'd think not. If it's blocked it's blocked with a thick crud which took, in your case, 1/4 million miles to accumulate. A little solvent in the crankcase isn't going to touch it, in my UNEXPERT opinion. It's time to refresh those parts anyway. Kira