Had that issue myself... all in all, a process of elimination has to be done.
A few questions to narrow it down more... we can help better to know a few things first.
1. Anything new or changed in coooling system lately/reciently?
2.Any sign of coolant in oil or VS?
3. It does this 10 minute heat up with or without 160 thermostat? is that right? Has there been a leakdown or cyclinder pressure test?
4. Water pump: is it new? pushing coolant to fast? Electric or man? If electric, does it have a sender/relay/fuse failure?
5. What kind of fan... distance between it & rad?
6. Motor- is it newer/fresh install... hows the oil pressure? How about smoke/color? any white smoke?
7. Radiator... I think a 3 core is ok, 4 is better, but if one core has been comprimised, it can seriously cause blockage issues. Should do a bench flow test on the radiator alone... it could simply be blocked from coolant breakdown, long term corrosion etc... Do you have any external coolers (oil,etc..) mounted to the Radiator?
Sorry for the 20 questions, but 10 minutes or less means something is seriously comprimised & it is hard to say w/o knowing a few more things. Good luck!!