Hi everyone,

My cars cooling system is currently set up as follows:

- RE V-Mount kit (w/ Koyo rad)
- Eliminated AST
- Throttlebody coolant passage removed, looped to rear rotor

Can anyone post the definitive way to completely flush my cooling system with my mods? I've read lots of writeups, but they've all been for stock FDs. I've also read about pulling the drain plug on the side of the engine block - can anyone comment on that?

Basically I need to know where to drain to get everything out, where to fill it up from, and how to completely bleed the system to get every single bubble of air out.
Thanks in advance, I really really appreciate it!

 

There are only the two drain points:
(1) radiator bottom drain
(2) engine block drain on the left side of the center side housing. This one does drain a little more when removed.

"Throttlebody coolant passage removed, looped to rear rotor"
If you disconnect one end of this, the engine will fill faster and fuller when refilling. I disconnect mine where it comes out of the TB.
But since your mod, you now have only one choice, the tube below the TB.

 

Yeah, that's what I figured. Thanks for the points!

Can someone please give me a good step-by-step on the flushing/filling/bleeding with my mods?

I'd really really appreciate it!

 

Once you drain, there is a special coolant device that you hook-up to compressed-air, and it will create a vaccuum in the cooling system.

Then you flick a valve, and it then sucks in your new coolant.

:-) neil

 

I don't know about definitive, but I will share what I know.

In addition to the radiator drain (Obvious, but including for completeness) you
need to remove a bolt on the drivers side of the engine, near the bottom of the
'block'. Not being at home at the moment, I can't go out and look at my car, but
there are not too many choices of bolts there to pull.

Quite a bit of fluid will come out of that after draining the radiator. Jacking
the back of the car up a bit will get some more coolant out of the engine.

You will also need to disconnect the coolant lines to the heater. I
force air into one of them to drain coolant out of the other line IIRC.

Be sure to drain the overflow as well.

You may want to blow some air through the throttle body as well if

Fill it up from where the pressure cap attaches, wherever yours might be.
Fill the overflow tank also.

My car still has an AST, so it is a bit different.

I jacked the front of the car up to get the air bubbles to come up to the front, and ran the engine long enough to get warm, all without the pressure cap.

Doing this a few times, and sqeezing the air out of the hose going to the AST seem to do it.

You probably need to do this with the heat on in the car, to get the air out of the heater core.

HTH