ORIGINAL: 924nutter
Take the cam tower off and have a look before guesssing. There will be some "breakthrough" swarf. unfortunately you cannont rely on particles of swarf obligingly making thier way to the sump, they will MOST LIKELY become lodged in a crevice somewhere in the head as the oil, which is under no pressure other than gravity meanders its way over all the casting webs and back into the sump through the return gallery. I am not toally familliar with the 944 head but if it follows convention then the retrun gallery will be at the back of the head and you have pierced the casting towrds the front. My guess, no way back to the sump, too many cosy recesses to hide in. If you let the alloy swarf get to the sump then that is a minor disaster. Alloy swarf, DEPENDING ON ITS PHYSICAL SIZE can sometimes float, but if it sinks it will migrate to the pump eventually, and the effects of that wont be pleasant for pump, let alone the mains and big ends. You might be lucky and get all your swarf out by changing the oil, that is if it doesn't cling to any surface during the drain, and anyway to drain the oil properly you need run the engne to warm the oil up to reduce its viscosity so that its ability to drain is optimised, and as much clinging crap as possible is flushed out with the old oil, so it's catch twenty two-there. A crumb of comfort is that where you have broken through is far enough away from the sump return for it to become lodged in the head proper, so don't lose any sleep until you have had a desmond; i.e. desmond dekker-dekko/ look. Just getting in London mode; might, and its a big might, come and show off the new hood on the turbo cab but seeing as I have just come back from Siverstone classic Pauline might object a bit.
