ACC1 Climate Control Servo Bypass

[derburger]

First of all, I would like to thank the members of this forum for all the help and advice you've given me so far. My car and I salute you!

Anyways, I have a 1980 300cd with the Chrysler climate control servo. The case is cracked and the servo is done for. The climate panel buttons do nothing, except defrost. I plan on buying an Aluminum bodied servo eventually but I would like heat for now.

As for the repair, from what I've read on this forum, this would restore full heat to the system, which is what I want at this point.

1. Drain the coolant from the radiator. (Is this necessary for this fix?

2. At the front and back hoses that are closest to the engine on the right, unscrew the clamps, and fit a ball valve between them. This line runs from the engine block to the AUX water pump, and to the heater core (I think)
If the ball valve would be closed, what would happen to the coolant behind it, would it just drain back into the block?

3. At the the hoses that are on the front and back left side, remove them from the servo and connect them with 1/2' copper tubing underneath the servo, or run 1/2' line instead. Am I correct in saying this is the return line?

4. Unhook the temp. sensor lines at the bottom of the servo and connect the two hoses with rubber tubing.

5. Refill the radiator with coolant, start the engine, check for leaks.



Here are some photos of my servo situation. I have read that other people have disconnected hoses at the firewall. Would what I'm planning to do work, or am I missing something? Also, is the hose 1/2 inch ID? Thanks for your support!