All I was curious to know is which way does the coolant flow into the tb. Is if from the driver side to Passenger or the other way. I'm asking because I'm working out cooling issues. Pre bypass when adjusting the forward bleeder screw that goes to the heater core it would expell fluid . NOW the pump actually suck air in that bleed screw when the water pump is running. Does the water flow to the heater core from this tube or return to the pump from the core.

 

Performing a TB bypass is basically pulling the two lines off the TB and connecting them together. Of course you want to optimize the lengths and routing for a clean install. Therefore water flow direction shouldn't play a part. The metal line that runs along the passenger side valve cover is extracting trapped air bubbles from the back of the heads and returning them to the radiator.

It sounds to me that your system is low on fluid if fluid does not expell from your bleed screws when the engine is warm.

 

Or he has air in his system, so there is probably air coming out of the bleeders instead of coolant. If you are trying to bleed the system only leave one screw open at a time, and alternate them.

 

yes I have blead them in that fassion it is jus that with engine relivly cool and running it actually sucks air into the heater core bleed screw after the tb bypass.

 

Whenever i bleed the system, i always fill it up, put the radiator cap on and let it warm up a little to build up some pressure then i open the bleeders, one at a time. It will hiss for a while while air comes out then coolant will come out. Thats it. -Jeff

 

turn the engine off before you bleed it.

1. Warm engine until it gets to about 220.
2. Shut off engine.
3. Open 1 bleeder valve, let it bleed air.
4. When it stops bleeding and coolant begins coming out, close it.
5. Open the other valve and repeat.
6. Warm car again and try to bleed again. If no more air comes out, you're done!

Usually takes 2-3 trys to bleed it completely, in my experience.

The TB bypass will not be the cause of it trying to suck in air. The bypass does nothing but route the coolant through hoses instead of the TB. It only helps.