Join Date: Jun 2002
Location: USA & Singapore
Ferrari Life Posts: 5,509
I had some helicoils in my toolbox and I checked and they are ferrous, a magnet does capture them. So that answers that question.
I'm not familiar with the 348, but I've never seen a manual gearbox with a dipstick; they usually have a fill/level plug, I'm guessing that is what you mean. I can't imagine the oil flow would be too dramatic in the box but at high RPMs I am guessing it would slosh around pretty good, maybe enough to overcome the magnet. I think my 308 tranny has a pan that can be removed, maybe your tranny also has a pan that can be taken off to clean out any junk in the case?
As for the "proper" fix, there is nothing wrong with using a helicoil, I've used them for years on cars and motorcycles fixing everything from oil drain plugs to spark plug threads. When you put in a helicoil because the original aluminum threads stripped out, the new helicoil setup is actually stronger than the original threads because with the larger hole needed to put in the helicoil the load is spread out over a larger area. Personally, I'd rather put in a helicoil than drill and tap for a larger bolt or plug.
'79 308 GTS, '82 Jeep CJ7 Jamboree
"Time is what prevents everything from happening all at once."