Question for any one who has installed one of these. Which hose is the heater inlet hose to install the Tee into? Thanks

 

I wouldn't add it. Procedure for changing coolant in these motors is pretty simple. Older cars required a flush. With these, it's purely a drop and refill.

Drain the radiator through the petcock at the bottom of the radiator. Then open the block drain at the back of the motor between the firewall and the motor. You can hook a hose to it and control the flow if you want. Once both are dropped, close both valves and refill with a non-silicate coolant 50/50 mix. You'll only need 1 1/2 gallons so I just used Acura premix. Don't forget to bleed the system. That's what the dealer would do and also the procedure out of Helm's.

If you use the Prestone flush system, you'll introduce water from your hose into the system which is not as stable and could contain minerals. Keep your system as pure as possible. That's my