Heat Exchanger connection

I used a add a circuit fuse adapter to power the relay for the heat exchanger pump relay. I connected it to the O2 heater circuit because it does not carry a signal, just heats the O2 sensor. This turns on the water pump with ignition on.

I mounted the pump to the driver side radiator mount with a 2.5 inch clamp mount with the intake port upside down and the output pointing to the heat exchanger out front. Make sure there is noting rubbing where vibration can cause a problem latter.

I had mounted the reservoir higher than the ports on the lid to help bleed the system.

I ran the line from the lower lid port to the pump inlet. To the heat exchanger , back to the reservoir then in to the top port on the lid.

Don't fill the system yet.

Bleeding the system is a bitch. I had to drain the $20 a gallon coolant to use a garden hose to get all the air out. The pump out ran my hose nozzle and I had to connect the hose to the reservoir and let the system drain in to a bucket so I could see the air. Run the hose, start the pump and listen to the pump cavitate, watch for air leaving the system. once you are sure all the air is out turn off the pump and then the hose. Do not let the air back in the system.

Now you have crappy city water in your brand new LSA. Let the water out till about 1 inch from bottom of reservoir by spilling the hose to the reservoir in to a bucket.

Add $20 a gallon coolant. The coolant will push the water out. keep pouring till the water is out and the coolant color coming out is dark. mine was orange.

Reconnect the hose to the reservoir and turn on the pump. there will be more air so connect a battery charger and let it run till the coolant flows clear and there is no more milky air mixed in.

All in all it took about half a gallon to fill and purge the system. keep checking the levels for the next few days when the system runs.