# SR20DET Heater Hose Install **URL:** \ **Category:** SON240sx Automotive\ **Created:** [May 18, 2009, 11:41am UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579 "2009-05-18T11:41:42Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 11:41am UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/1 "2009-05-18T11:41:42Z")
I’ve searched for friggin hours trying to get the orientation of what hoses are plugging into what. I can find a full wiring schematic for a kouki cluster, but I can’t find one photo or anybody who could explain what goes where. I’m not exactly a mechanic but I can still understand what’s shown/explained to me if it’s a good photo/explanation or what not. I have my kit, 3 hoses, 5/8"-3/4" adapter (connects U hose to L hose), and 6 hose clamps. If anybody would be so kind to tell me what the crap to do with them now that’d be AWESOME. I know this isn’t extremely difficult, but I don’t exactly know my way around just yet ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 18, 2009, 12:15pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/2 "2009-05-18T12:15:20Z")
Use the U and L hoses to do the lines from behind the head to the top port on the firewall Use the S shaped hose to do the line line from under the intake manifold with the bottom port on the firewall > **[FRSPORT Gates OEM Heater Core Hoses Conversion for USDM 240SX with S13 SR20DET](https://frsport.com/Gates-OEM-Heater-Core-Hoses-Conversion-for-USDM-240SX-with-S13-SR20DET_p_8951.html)** > > Part No. 1139 SKU: 8951 | Gates OEM Heater Core Hoses Conversion for USDM 240SX with S13 SR20DET All hoses included Straightforward install | Price: 22.13 ![http://www.frsport.com/images/detailed_images/OEM_SRHeaterHoses_1.jpg](http://www.frsport.com/images/detailed_images/OEM_SRHeaterHoses_1.jpg) ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 1:44pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/3 "2009-05-18T13:44:28Z")
> [@A bike that i have wanted for years is made.](https://forums.speedlife.net/t/a-bike-that-i-have-wanted-for-years-is-made/22040/13): > > Use the U and L hoses to do the lines from behind the head to the top port on the firewall > > Use the S shaped hose to do the line line from under the intake manifold with the bottom port on the firewall > > [http://www.frsport.com/Gates-OEM-Heater-Core-Hoses-Conversion-for-USDM-240SX-with-S13-SR20DET\_p\_8951.html](http://www.frsport.com/Gates-OEM-Heater-Core-Hoses-Conversion-for-USDM-240SX-with-S13-SR20DET_p_8951.html) Ok I will try this…sounds easy. trying to picture it in my head. The U and L connect together using the 5/8"-3/4", right? ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 2:35pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/4 "2009-05-18T14:35:41Z")
Also, with no heatercore, this would just be exhaust heat pumped in uncontrollably into the cabin from the engine? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 18, 2009, 2:38pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/5 "2009-05-18T14:38:40Z")
Yes I believe a reducer barb is needed. I forget the exact sizes but 3/4 -\> 5/8 sounds about right I think. Pics here: [http://forums.freshalloy.com/showpost.php?p=1526473&postcount=33](http://forums.freshalloy.com/showpost.php?p=1526473&postcount=33) ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 2:40pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/6 "2009-05-18T14:40:06Z")
> [@951 winter progress](https://forums.speedlife.net/t/951-winter-progress/19571/84): > > Yes I believe a reducer barb is needed. I forget the exact sizes but 3/4 -\> 5/8 sounds about right I think. > > Pics here: > > [Freshalloy.com](http://forums.freshalloy.com/showpost.php?p=1526473&postcount=33) yep I got all the parts needed. but back to my no heatercore theory…therefore there would be no controlling the heat exhaust from engine into cabin? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 18, 2009, 2:50pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/7 "2009-05-18T14:50:59Z")
Not sure what you mean but the heater core is just another radiator who’s ambient heat is blown inside the cabin with a fan. > **[Heater core](https://en.wikipedia.org/wiki/Heater_core)** > > A heater core is a radiator-like device used in heating the cabin of a vehicle. Hot coolant from the vehicle's engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air. Fins attached to the core tubes serve to increase surface for heat transfer to air that is forced past them, by a fan, thereby heating the passenger compartment. The internal combustion engine in most cars and trucks is cooled by a water and antifreeze mixture that is circulated through... ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 2:53pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/8 "2009-05-18T14:53:49Z")
I know, but the hoses go from engine through firewall into the heater core. from there it is routed to vents by the heater core. Say there was no heater core there, then the ambient heat from engine through hoses would dump into the cabin with no routing or control. Yes? ---
**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\ **Post date:** [May 18, 2009, 6:47pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/9 "2009-05-18T18:47:21Z")
this “ambient engine heat” you speak of is actually hot coolant. a liquid. with no heater core and no bypass loop, you would just dump coolant on your floor… wth are you trying to do? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 18, 2009, 6:50pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/10 "2009-05-18T18:50:24Z")
Like I said, the heater core is just another radiator. Think about what would happen if you took out the radiator up front? ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 6:52pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/11 "2009-05-18T18:52:26Z")
Thanks for clarifying that it’s a hot coolant. so what’s coming through the hoses is hot coolant once connected. Wth it is that I’m trying to do is restore my climate control. I have to hook up my hoses to my SR, but before that I need a heater core cuz the knobend previous owner took it out. Step 1: install heater core Step 2: install hoses Do not skip Step 1 (basically :P) ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 18, 2009, 6:57pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/12 "2009-05-18T18:57:06Z")
The prev. owner took out the heater core? ON the KA motor? How did he have his lines setup then? Strange. ---
**Author:** ![Sempre\_5](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sempre_5/32/5701_2.png) [@Sempre\_5](https://forums.speedlife.net/u/Sempre_5)\ **Post date:** [May 18, 2009, 7:08pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/13 "2009-05-18T19:08:35Z")
> [@FESTIVUS!](https://forums.speedlife.net/t/festivus/22046/2): > > The prev. owner took out the heater core? ON the KA motor? > > How did he have his lines setup then? > > Strange. I dunno, he was tard. car came with SR, no heater core no glovebox, ecu hangin out…lots of issues NEVER buy from Brampton again:confused: ---
**Author:** ![DirtySpec](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dirtyspec/32/5918_2.png) [@DirtySpec](https://forums.speedlife.net/u/DirtySpec)\ **Post date:** [October 9, 2010, 3:26pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/14 "2010-10-09T15:26:49Z")
> [@Sempre 5](#): > > I dunno, he was tard. > car came with SR, no heater core no glovebox, ecu hangin out…lots of issues > NEVER buy from Brampton again:confused: Shit son, I wish I read that befor I bought a 89 240 in Brampton lol I have oil coming from the SS and rad fluid just poured out and I think I have this issue. I couldn’t find where it cam from it was dripping off the base of the car ---
**Author:** ![DirrtyDevo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dirrtydevo/32/5547_2.png) [@DirrtyDevo](https://forums.speedlife.net/u/DirrtyDevo)\ **Post date:** [October 9, 2010, 11:45pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/15 "2010-10-09T23:45:37Z")
Theres 2 lines on your firewall, ones a inlet and the others a return line. In the cabin of the car one of those lines had to have been recirculated to the opposite line to complete a circuit otherwise you’d have one huge coolant leak. ---
**Author:** ![DirtySpec](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dirtyspec/32/5918_2.png) [@DirtySpec](https://forums.speedlife.net/u/DirtySpec)\ **Post date:** [October 12, 2010, 9:01am UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/16 "2010-10-12T09:01:17Z")
I’m not exactly sure what went wrong. I had the car a few days, took it out, spun out twice in the parking lot came home and I see coolant pissing off the bottom off the car under where the passenger’s seat would be. I trided looking under a few days after to see if I could find where it came from but no luck. Can you see the hoses from the top or bottom or both?? Anyone in the Hamilton region with a shop who knows 240’s and SR’s?? ---
**Author:** ![DirtySpec](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dirtyspec/32/5918_2.png) [@DirtySpec](https://forums.speedlife.net/u/DirtySpec)\ **Post date:** [October 13, 2010, 3:43pm UTC](https://forums.speedlife.net/t/sr20det-heater-hose-install/124579/17 "2010-10-13T15:43:01Z")
Found the problem the hoses consisted of piping, hose and clamps. Not very fashionable… The engine movement would cause leaks and a guess the pressure as well.