I have a sbc 355 that has had some issues lately, While I have sorted most of them out, something strange has happened recently and I was wondering if anyone could help me out.

My engine has chrome valve covers with breather valves in each. In the last month, the right side breather cap has been blown off the engine with enough force to tear the rubber grommet.

I canot afford tokeep replacing chromed breather valves s can anyone explain to me why this is occuring?

Any help would be appreciated.