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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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01-24-2006, 12:01 PM | #1 |
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S13 SR Turbo Coolant Return (please read and comment)
Problem:
Okay, here's the problem. The stock S13 SR20DET turbo coolant return line is routed to the back of the motor at the factory. When the motor is already installed in the car, it is very difficult to get back there since there is very little clearance. Plus there will be additional chances of damaging the hose fittings back there, which would be very difficult to repair. This picture shows the return hose. Note where the braided line goes. It's very hard to get to that fitting without having to pull out a lot of wiring and hoses. I checked with a few sources on how to re-route that line, and I wasn't very happy with what I found. Solution 1: Install a new line and fittings/clamps when you prep the motor out of the car prior to installation. This is definitely the best way if you still have the motor out. Not good if it's already in. Solution 2: Install a water outlet from an S14 or newer SR20DET. Nissan addressed this problem in the newer generation motor by tapping the water outlet for the return line. You can see the new water outlet below, and the full write-up is here: http://www.sr20tuning.com/fittingaturbo.html This part is very hard to find. I already tried calling all the local shops. Then I started contacting major Nissan parts supplier, and nobody can get a hold of one. If you're lucky, you'll find a blown S14 motor and you can pick it off, but I wasn't so lucky. Solution 3: Fabricate a tap with the stock water outlet. This could work, but it's also very difficult to source a stock S13 water outlet so I could not risk the machine shop damaging the part. Solution 4: Blitz makes a silicone upper radiator hose for the SR. It comes with a bung meant for the water temperature probe. I imagine you could insert a hose fitting and tap it for the water return line. The cost is around $120 shipped. Solution 5: I got in touch with a vendor over on SR20Forum. He manufactures custom water outlet adapter plates (amongst other things) that has fittings for a coolant return line. He doesn't have any RWD application at the moment, but I've been corresponding with him to try to help him develop some adapters and bring them to market. Cost will be around $40. His site is under development: http://www.customsteel.com/sr20/ So right now I've put the words out on #3 so that's out of my hands. A couple of shops are looking for me but chances are slim. I'm going to look more into #4, and he's working on #5. If anybody has a good solution to this, please post up. Thanks for your time. |
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01-24-2006, 12:22 PM | #2 |
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Just to touch on solution 5, i toyed with that exact idea. The problem is, take a look at your water outlet neck. Theres not enough room for that spacer. If you look at it, you'll understand what I mean. The water neck is a good idea, I would go that way. Just tap the one you have now. Tapping is not hard at all, just take your time and make sure you use the right size.
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01-24-2006, 12:24 PM | #3 |
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I just used a hack saw to cut the stock coolant return line further down where it starts heading towards the turbo, and stuck on the new braided line. All with the motor in the car....beacuse you're right, it's impossible to get at the back of the motor with all the wiring and brake lines in the way.
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01-24-2006, 12:26 PM | #4 |
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I also noticed that the rear hose was really hard to install when the motor was already in and the fact that it is hard to run the line without damaging it or other stuff.
I just kept the factory hard line since it is easy to bend out of the way and it only installs with a factory hose clamp. The s14 water neck would be the easiest fix if you could find one. |
01-24-2006, 12:42 PM | #6 | ||
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Okay, thanks for the comments.
Quote:
Quote:
Please keep the comments coming. |
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01-24-2006, 12:54 PM | #9 |
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I worked my way around all the local shops. Then I started going down the list with places people here usually go to. Most places don't have it. Some places don't like to answer their phones and emails. Courtesy told me they don't have it. I have Performance Nissan looking for an OEM part from Japan for me. That would be ideal, but I think that's a long shot.
I'll keep looking I guess. I was toying with #5 because he only wants $40 shipped for it, and it doesn't look too bad. |
01-24-2006, 12:56 PM | #10 |
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call shops in CA
sr20store.com phase2motortrend (email them) ooh my friends at Garage WOrks probably has one www.garageworksltd.com um..venus auto, who else...jspec..mmmm g-dimension.com etc etc etc heavy throttle? jarco? i called like 8 shops and i found one by 2 day and had it in hands on day 3. takes time and energy but it pays off. |
01-24-2006, 01:23 PM | #11 |
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Thanks for the tip. I already contacted a few of the ones you posted there.
I'm waiting on one place, and if they can't come through then I'm going to hit up everybody else left. |
01-24-2006, 01:32 PM | #12 |
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Thanks for the info on the S14 coolant neck. That is the route I would take.
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01-24-2006, 01:36 PM | #13 |
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hahaahah I'm a moron, my apologies. I commented about a FEED, not a return. I thought you were trying to get the feed to the turbo, in which case you would have needed to tap off where the thermostat is, on that housing. If that was the case, you couldn't fit the adapter in question there. But if your talking about the RETURN, that bracket your talking about should work if he makes you one.
Of course, you can always just use the Throttle body coolant lines, like the FWD guys do.
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01-24-2006, 02:25 PM | #15 |
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[QUOTE=g6civcx]
That's a good idea. The only problem is there is still a rubber hose back there to connect the two hard lines together. It would suck if you blow that hose on the track and the motor is smoking hot so you can't get back there to seal them up. QUOTE] Good point..... Back to the drawing board |
01-24-2006, 02:57 PM | #16 |
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I pulled off the hose that connects the metal coolant return line to the block. You can see it here. It's connected by little spring clips that were very difficult to get. It took a lot of patience to get out. I can't imagine doing this at the track when the motor is hot and you're short on time.
The rubber has hardened, and the weave is starting to stray. It looks good on the outside, but the rubber coating is really just cosmetic. It's the weaving inside that gives the hose its strength and structural integrity. If you're curious where it mounts, look at the picture below. The red line is that rubber tube there. It mounts up to the block and connects to the blue line, which is the turbo coolant return line. If you get the Taka S13 T25 kit, it replaces both the rubber and metal lines. |
01-24-2006, 07:55 PM | #17 |
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Also, http://www.performancenissanparts.com/ can get it by special order from Japan for about $75 apiece.
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01-25-2006, 11:49 AM | #18 |
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even if you go with S14 waterneck deal, you still have to get to that hardline to plug it up. So why not just do the SS line??
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01-25-2006, 12:32 PM | #20 | |
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Quote:
The problem isn't working with the car in the shop. When it's here, I have as much time to do whatever I want. The problem is when you are at the track, and that coolant line ruptures, you have a hot motor, leaking coolant, and limited time to fix it while your precious track day is winding away. I am after reliability, simplicity, and cost savings in both time and money. Plugging up that hard line isn't a big deal. It's a one shot deal. I just don't want pressurised hot coolant running back there since it increases the risk of a rupture. Nissan already thought about this and this is why they changed it for the S14. We're just retrofitting the solution to the older redtop. |
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01-25-2006, 12:35 PM | #22 |
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ill be up at GW working on my friends car alllllll day long. (rebuild w/ big turbo going in again)
soill look for one if they have one ill buy it and sell it to you w/ shipping costs. kepe u updated and let u know friday. peace |
01-25-2006, 02:42 PM | #23 | |
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Quote:
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01-31-2006, 01:23 PM | #25 | |
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Quote:
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01-31-2006, 02:31 PM | #26 | |
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Quote:
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01-31-2006, 03:03 PM | #27 |
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if you can use the s14 sr neck for a return line, where can you tap for a feed? (rwd sr20de doesnt have the feed tapped into the block) closer to the turbo would be better
Last edited by nsn240; 01-31-2006 at 07:31 PM.. |
01-31-2006, 04:10 PM | #28 | |
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01-31-2006, 11:02 PM | #29 |
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I hooked up the braided line to the back of the redtop tonight, and surprisingly it wasn't as difficult as I thought. I had to remove the brake booster hose, heater hoses, coil packs and a few misc brackets and from there it was pretty easy.
Also if you remove your turbo a lot, just disconnect it at the turbo and leave the line on the motor. I was easily able to attach it to the turbo after the line install by tilting the whole manifold/turbo assembly upwards. Of course your DP and elbow must be off. |
01-31-2006, 11:10 PM | #30 |
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You can get to it from the left side by tucking under all that wiring and hoses. It's hard to get at the factory hose clamps so replace them with better clamps.
It'll be hard to get the return line where it meets the turbo since it's on the other side of the turbo, wedged between the turbo and the block. |
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