Hey guys, I’m about to replace the heater core in a buddies 08 ex35. I looked all over for good info on the process and couldn’t find much for this model. I downloaded the fsm for cooling system and heat and ac and didn’t see anything in either. Also I’d prefer to do it the easiest way possible and not rip the whole dash out if possible. I saw a video where the guy cut a metal piece in the driver footwell that supposedly blocks access to heater core and is the reason the dash has to come out. He was able to do it from there but not sure it was a ex35. Any help will be greatly appreciated

Nico has the FSM for the '08 EX35:
https://www.nicoclub.com/infiniti-service-manuals

There are very few Nissan products where you can short cut the heater core or evaporator, the dash almost always needs to come out. You'll find the dash removal drawings and instructions in the Interior (INT) section and disassembly of the HVAC in the Heater/AC Control System (HAC) section.

Correction, the R&R and disassembly instructions are in the Ventilation (VTL) section. Here's a link:
https://www.nicoclub.com/service-manual ... %2FVTL.pdf