Routing of coolant hoses into throttle body and IACV?

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impreza_GC8
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Routing of coolant hoses into throttle body and IACV?

Post 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.
-'97 Outback - EJ25 block/pistons/HLA heads, EJ22T crank/rods/ECU, EJ20G intake manifold/fuel rails/440cc injectors, VF8 @ 11psi. . . . Fuel cut > me
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impreza_GC8
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Post by impreza_GC8 »

Morning bump.
-'97 Outback - EJ25 block/pistons/HLA heads, EJ22T crank/rods/ECU, EJ20G intake manifold/fuel rails/440cc injectors, VF8 @ 11psi. . . . Fuel cut > me
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Legacy777
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Post 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.
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impreza_GC8
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Post 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.
-'97 Outback - EJ25 block/pistons/HLA heads, EJ22T crank/rods/ECU, EJ20G intake manifold/fuel rails/440cc injectors, VF8 @ 11psi. . . . Fuel cut > me
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kimokalihi
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Post 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.
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ciper
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Post 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.
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impreza_GC8
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Post by impreza_GC8 »

^ I see. Well I need to find a coolant line to tap into I suppose. . .
-'97 Outback - EJ25 block/pistons/HLA heads, EJ22T crank/rods/ECU, EJ20G intake manifold/fuel rails/440cc injectors, VF8 @ 11psi. . . . Fuel cut > me
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ciper
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Post by ciper »

This thread has some of the coolant routing information http://forums.nasioc.com/forums/showthr ... ?t=1913750
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impreza_GC8
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Post by impreza_GC8 »

^ THANKS! This was the picture I needed:
Image
-'97 Outback - EJ25 block/pistons/HLA heads, EJ22T crank/rods/ECU, EJ20G intake manifold/fuel rails/440cc injectors, VF8 @ 11psi. . . . Fuel cut > me
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