Yes, any cracks in the precup are a big problem - probably the biggest problem faced with the IDI engines. They can grow very quickly and once the prechamber is cracked through it will hammer into the piston destroying both the piston and head. Sometimes the pieces will fall into the cylinder destroying the rod and block as well.
...BTW your Bieber avatar is awesome.-Malone
I took a closer look. The one in question is hard to tell if its a crack, looks more like a scratch.. But I'm not positive. It does not appear to have a gap like a crack would. On #4 pre cup there does appear to be a super dooper small crack. Leaky injectors cause them to crack. At least that's what I was told. Call Frank Irving he should be able to tell you where to find them, as they are something he deals with on a regular basis. He knows where to get AAZ ones as well. I would think they would all be the same.. But I guess not?
Frank Irving? Could you elaborate?
Quote from: camboscams on March 05, 2013, 10:51:48 pmFrank Irving? Could you elaborate?Google Franks TDi's