R56 won’t start after replacing aux water pump + coolant expansion tank after finding multiple cracks. I also installed an aftermarket intercooler while the car was on jacks, but I figured that couldn’t have caused a no-start. The car cranks a bit sluggishly, but doesn’t turn over. I’m charging a jump starter as I type this but is there a possibility it’s something else?
Maybe an electrical connector I missed reconnecting somewhere?