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Old 04-19-2011, 03:54 PM   #1
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vacuum hose / heater hose size

What size is the stock Yaris vacuum and heater hose? I.D.

Thanks
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Old 05-16-2013, 07:47 PM   #2
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I know this thread is 2 years old, but I've been needing to know this. I took a pair of calipers and measured the ID of the hose that goes from the valve cover to the intake manifold and it came out to 18.6mm. I found 19mm (3/4") hose online, but I'm not sure if this will work. My hose is leaking and I'd like to get a hose that doesn't have that weird insulated coating around it that I can get a proper hose clamp on instead of that piddly little metal clip.

Ideas? Opinions?

This is the hose I was looking at: http://www.amazon.com/gp/product/B00...1&s=automotive

As you can see this one is pretty expensive, so I don't want to buy it and it not fit.
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Old 05-17-2013, 10:58 AM   #3
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Has noone replaced this hose with a non-factory part?
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Old 05-17-2013, 11:04 AM   #4
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3/4 hose should work
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Old 05-17-2013, 11:34 AM   #5
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I can't seem to find the thread, but a while back someone asked the same thing and I posted the measurements. Rather than measuring the existing hose, measure the nipple that it will go onto at a point other than the flared area.
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Old 05-17-2013, 11:58 AM   #6
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Yeah I had asked you at one point over on MI I believe, but I never could find that thread either.
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Old 05-17-2013, 01:46 PM   #7
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Quote:
Originally Posted by 47_MasoN_47 View Post
I know this thread is 2 years old, but I've been needing to know this. I took a pair of calipers and measured the ID of the hose that goes from the valve cover to the intake manifold and it came out to 18.6mm. I found 19mm (3/4") hose online, but I'm not sure if this will work. My hose is leaking and I'd like to get a hose that doesn't have that weird insulated coating around it that I can get a proper hose clamp on instead of that piddly little metal clip.

Ideas? Opinions?

This is the hose I was looking at: http://www.amazon.com/gp/product/B00...1&s=automotive

As you can see this one is pretty expensive, so I don't want to buy it and it not fit.
5/8 hose is the one that you need.. just ask for one in the nearby automotive store.. very cheap stuff
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Old 05-17-2013, 03:15 PM   #8
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Thanks Tolmach.

Would silicone be okay to replace that valve cover to intake hose with? I read that silicone isn't safe for oil. I'm not sure how much oil goes through that hose but I know there is some, because it's all over my supercharger throttle body tube thing.
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Old 05-17-2013, 03:43 PM   #9
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It will fail early as oil will soak into it. And a lot of oil blows in to the intake that is why mine is blowing into the air, mmmm the sweet smell of oil.
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Old 05-17-2013, 04:06 PM   #10
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Mine is silicon and has been on there for about 3 years so far its held up.
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Old 05-17-2013, 04:32 PM   #11
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Quote:
Originally Posted by 47_MasoN_47 View Post
Thanks Tolmach.

Would silicone be okay to replace that valve cover to intake hose with? I read that silicone isn't safe for oil. I'm not sure how much oil goes through that hose but I know there is some, because it's all over my supercharger throttle body tube thing.
Do not know.. I am just using cheap regular one ))
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Old 05-17-2013, 08:28 PM   #12
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My Weapon R intake tube came with a silicone hose and I've had it on for about 9 months with no issues. No softening, no swelling, no discoloration, no deterioration. Now that you mentioned it, I'll keep a close eye on it for any changes and will post them if anything happens.
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Old 05-17-2013, 09:58 PM   #13
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Even though they don't look as nice (I really wanted some pretty blue hoses haha) I went ahead and just got a regular ol black piece of heater tube. It was $5 for 2 feet of it and a couple of steel hose clamps.
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