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Routing of coolant hoses into throttle body and IACV?
Posted: Tue Jan 05, 2010 7:13 am
by impreza_GC8
Can anybody help me figure out the routing of the coolant hoses that pass through the throttle body and the IACV? The person who built my motor bypassed the coolant ports on the TB and IACV and I'd like to reconnect them to the coolant supply if possible.
Posted: Tue Jan 05, 2010 4:34 pm
by impreza_GC8
Morning bump.
Posted: Tue Jan 05, 2010 4:59 pm
by Legacy777
The coolant fitting on the IAC that faces towards the front of the motor gets hooked to the fitting on the coolant crossover. The rear fitting on the IAC valve gets hooked to the passenger side fitting on the TB, while the driver's side fitting on the TB gets hooked to the fitting coming off the metal heater line on the driver's side.
Posted: Sat Jan 09, 2010 7:39 pm
by impreza_GC8
Ah, well I'm running an EJ20G intake manifold, which has the IACV on the opposite side of the motor. I'll just have to figure it out on my own, but it seems to run fine with no coolant running through the throttle body or IACV.
Posted: Sun Jan 10, 2010 1:36 am
by kimokalihi
It'll run fine with it bypassed. That's just supposed to keep the throttle plate from freezing I believe. Or so they say.
Posted: Sun Jan 10, 2010 10:23 pm
by ciper
kimokalihi is right about the throttle body but you should run it through the IAC to help with cold idle. It has a heat spring inside that opens when the coolant is cold.
Posted: Thu Jan 14, 2010 7:57 am
by impreza_GC8
^ I see. Well I need to find a coolant line to tap into I suppose. . .
Posted: Thu Jan 14, 2010 8:13 am
by ciper
This thread has some of the coolant routing information
http://forums.nasioc.com/forums/showthr ... ?t=1913750
Posted: Fri Jan 15, 2010 7:44 pm
by impreza_GC8
^ THANKS! This was the picture I needed:
