Quote Originally Posted by winfred
the back two spark plugs usually catch most of the oil when it's sucking it past the plate, i've seen em barf in a couple years i guess the diaphragm in the plate could get stuck and let it suck on the crankcase, massive vacuum at the cap ain't a good sign, i've popped the oil cap on some that was like flipping the tab on a beer SHHHHICK
Hah!

No, there's no noticable noise coming from the oil cap when you open it, it just starts to make a weird noise from the PCV plate - I wonder if it's trying to slam shut and not quite sealing properly...

Will get the plugs out and consider re-sealing the rocker covers again... the PO practically glued them down with haematite, but they're still leaking a bit, maybe it's going down the back of the block.

I *do* tend to rag the balls off the car mind, so it may just be normal use for a car driven hard.