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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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05-18-2020, 06:52 PM | #57 |
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Most heater hose I've seen is rated to 275 F. As Weeder mentioned, I put some thermal sleeving on mine where they run close to the block or exhaust - just as a precaution.
If you use silicone hose the temp rating bumps up to something like 350 F. In addition, I picked up a molded 5/8" silicone 90 degree "L" to make the transition from the exit of the Forester/WRX coolant pipe to the OEM heater hose cleaner.
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05-20-2020, 03:56 AM | #58 | |
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05-20-2020, 10:36 AM | #59 |
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Why not just use the throttle body method?
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05-21-2020, 03:26 AM | #60 |
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Yes I am going to try the TB method. I wonder if anyone running into heat problem for the hose when connecting the TB? I am sure the hose would touch the metal part. Do I need to use some kind of heatshield like this one to protect the hose? https://www.ebay.com.au/itm/172355932574
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05-21-2020, 11:50 AM | #61 | |
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05-21-2020, 03:22 PM | #62 | |
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First, I bought the various parts to do the OEM(ish) approach 3 or 4 years ago and never got around to installing them. The current environment offers the time to finally put that together. Second, aesthetically, I like the cleanliness of that installation. Third, functionally. I have a hunch it may offer better coolant flow through the heat exchanger than the TB approach - admittedly, I'm just pulling that out of my ass but, oh well. If I were going to use a different variation, I'd use the feed side of the OEM approach and run the return line over the top of the engine around to the rear of the water pipe that bridges the two cylinder backs and swings around the passenger side to the upper radiator hose. There's a plate on the rear of that pipe that blocks off what on automatic trans cars is the return line from the trans cooler. I considered just buying the housing that bolts to that port and returning the coolant there. But, as I noted earlier, I already had the parts to do it this way and now have the time.
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05-21-2020, 03:26 PM | #63 | |
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05-21-2020, 03:36 PM | #64 |
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Something like this will help: https://www.spectreperformance.com/3...er-hose-sleeve
I was fortunate that the Cusco kit came with some plastic covering, but I still used the braid on a few sections, too.
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05-21-2020, 07:57 PM | #65 |
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I used Vibrant hose #20425. Highest temp rating I found (350F). One hose is more than enough - I had a bit left over.
https://vibrantperformance.com/catal...fe4e30d2eeed54 |
05-24-2020, 09:00 AM | #66 |
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Thanks guys, I will go with silicone hoses + shield
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05-24-2020, 09:33 AM | #67 |
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Bypass the TB. You don’t need the coolant heat soaking the TB.
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05-24-2020, 12:29 PM | #68 |
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05-24-2020, 01:10 PM | #69 |
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It’s only purpose is to warm up the TB when it’s below freezing and you park outside. Otherwise the 190f+ coolant will heat soak the TB, a lot of people just delete it from the loop. It isn’t going to hurt anything keeping it, but no point for most.
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05-25-2020, 09:26 AM | #70 |
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Agreed. I bypassed the throttle body on my '14 about four years ago and have had no problems in temperatures as low as 0 F.
(Incidentally I did the same mod to my Forester as well with no problems.) |
The Following User Says Thank You to T-Steve For This Useful Post: | T0rt0r0 (05-25-2020) |
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