Specifications

Procedure
1. Thoroughly clean the original thermal film from the mating surfaces (circled below) of
the bottom housing and thermal pipe. Use a plastic stylus to scrape the surfaces
clean. Note: Do not use an abrasive material or liquid cleaner.
2. Squeeze a thin film of thermal paste onto the thermal pipe. Spread the paste evenly.
3. Replace the bottom housing. Warning:
The bottom housing has four torx screws
that must be tightened to at least 17 in.-lbs. If you do not have a torque
driver, you will have to make sure these screws are tightened by hand
FIRMLY, BUT NOT FORCIBLY. Or, purchase the service tool (076-0899) in
order to ensure the thermal pipe is firmly mated with the top base. If the
bottom housing is not securely attached to the base in this fashion, the CPU
may overheat and become damaged.
Important: Diagnostic service cables allow the unit to run while the bottom housing is
open (as shown above). However, the computer cannot run for more than five minutes with
the bottom housing open. If it is open longer, the CPU may overheat and become
damaged.
Thermal Paste Application
iMac (Flat Panel) Take Apart - 15