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R33 gtst heater lines

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Can anyone help, this is my first r33 gtst build and I am wondering what the green hose like connectors that are in the block drivers side are used for?

Are they related to heater? SEE PIC below. Thanks 


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Yeah, I'm not 100% sure on rb25 but in rb26 there is a sub loom for the engine that has knock sensors, oil pressure and temp gauges, starter motor signal and a couple of other things.

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On 8/5/2022 at 2:36 PM, AL R33 said:

Plus I need actual sensors to plug into.

Knock sensors? No. The green "hose barbs" are the plugs on the knock sensors. The knock sensor is there, screwed into the block. The o-ring is a paranoia thing to keep the connection all sealed up.

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On an R33 RB25, I think they actually are your heater lines. The hoses go from there, behind the head/block along the firewall, to the heater ports on the other side of the firewall.

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On 8/8/2022 at 11:44 PM, AL R33 said:

Ok thanks. 
Also do you know what these 2 are and what they attach to?






The hose on the left closest to the firewall is a heater core pipe. It also goes to the oil/coolant heat exchanger and the throttle body. The hose it attaches to is 92400, which is the upper heater core hose. The one to the right of that goes to the lower heater core hose. In the absence of proper photos at each step showing how everything is laid out from the factory the EPC is as good as it gets.

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