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Old 10-07-2009, 08:49 PM   #1
V9exp
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2001 SC1
Default intake manifold. coolant hoses

Ive noticed on my 2001 sc1 there is an inlet and an outlet coolant line on my intake manifold. where do they run to? what are they for? thanks
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Old 10-07-2009, 09:25 PM   #2
wishihadacamaro
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Default Re: intake manifold. coolant hoses

I'm fairly certain the smaller one goes around the passenger side of the engine compartment to the coolant reservoir, and the larger hose goes to the heater core.
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Old 10-07-2009, 09:42 PM   #3
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Default Re: intake manifold. coolant hoses

then what is the purpose, besides heating up intake air?
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Old 10-07-2009, 10:42 PM   #4
velleguy73
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Default Re: intake manifold. coolant hoses

In cold weather the throttle body can freeze up. A little antifreeze circulation makes that go away. Certainly a BIG concern in Jacksonville.
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Old 10-08-2009, 12:18 PM   #5
mattelderca
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Default Re: intake manifold. coolant hoses

To clarify there is only one coolant line on the intake manifold. It is on the drivers side rear and feeds the heater core, just below. Yes it also warms the area behind the throttle for various reasons. The coolant flows through the manifold from the head.
The very small 1/4 inch return line to the coolant resevoiur comes off of the head next to the upper rad hose.
The other hose you may be refering to is on the passenger side of the intake which carries vacuum for the power brake booster.
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Old 10-08-2009, 04:52 PM   #6
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Default Re: intake manifold. coolant hoses

thanks for the info and the clarification mattelderca
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