[Excaliber]

I was talking about the intake (under water), not the block. Like Undy, I'm thinking intake because apparently it happened after the swap.

Of course, sometimes, logic such as that can be a red herring and it's not related at all. As fate would have it, the block or related component started to leak about the same time as the intake swap, couldn't rule it out.

Under water test is only applicable to those poor souls, like myself, without the diagnostic tools to do it another way.