heater hose routing

Discuss the RB20, RB25 and RB26 series engines.
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hungryjoseph
Posts: 1465
Joined: Tue Nov 07, 2006 2:46 pm
Car: s13 with rb25 and s13 with s14sr20

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which goes where?
I was almost sure 2 goes to 3 and 1 goes to 4... but just in case.
this is a series 1 25 with greddy intake mani

Image


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R32ONP
Posts: 93
Joined: Sun Jun 27, 2010 9:57 pm
Car: R32 Skyline GTS-T
RB20DET
Location: New Zealand

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it wouldnt effect it either way u put them on as they are both just inlets straight into the heater core...make sure u bleed it probly with the heater ON full

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hungryjoseph
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Joined: Tue Nov 07, 2006 2:46 pm
Car: s13 with rb25 and s13 with s14sr20

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Isntthere a directional valve in the core

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R32ONP
Posts: 93
Joined: Sun Jun 27, 2010 9:57 pm
Car: R32 Skyline GTS-T
RB20DET
Location: New Zealand

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not that i know of but unless someone knows for sure??? can u blow through it both ways?

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SullivanRacing06
Posts: 1974
Joined: Sat Apr 21, 2007 8:45 am
Car: r32 gtst, 06 350z, r32 gtr, rs4 steaga, 04 350z, f350/6bt
Location: Gainesville

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either way is fine........

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240AceX
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Joined: Mon Feb 23, 2009 6:33 pm
Car: 98 240SX SE

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For easier pipe routing and to have the pipes spaced out, I went 2 to 3 and 1 to 4 on my swap. As you will find out by trial and error if you go 1 to 3 and 2 to 4 the heater hoses will be crossed and hitting each other.

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hungryjoseph
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Joined: Tue Nov 07, 2006 2:46 pm
Car: s13 with rb25 and s13 with s14sr20

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thank you for your inputs

Joe
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Joined: Sun Feb 09, 2003 8:29 pm
Location: Phoenix, AZ

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hungryjoseph wrote:Isntthere a directional valve in the core
but there isnt one in the engine :p

it doesnt matter which ones go where. the "valve" in the heater core is just to allow coolant to flow into it so it will work.

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hungryjoseph
Posts: 1465
Joined: Tue Nov 07, 2006 2:46 pm
Car: s13 with rb25 and s13 with s14sr20

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ahhh that is true. i gues either way without the heater on the core still has coolant going through it


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