vacuum hose / heater hose size

[cali yaris]

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

Thanks

[47_MasoN_47]

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.

[47_MasoN_47]

Has noone replaced this hose with a non-factory part?

[kou]

3/4 hose should work

[CTScott]

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.

[47_MasoN_47]

Yeah I had asked you at one point over on MI I believe, but I never could find that thread either.

[TOLMACH]

Originally Posted by 47_MasoN_47

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

[47_MasoN_47]

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.

[kou]

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.

[YarisSedan]

Mine is silicon and has been on there for about 3 years so far its held up.

[TOLMACH]

Originally Posted by 47_MasoN_47

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 ))

[tooter]

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.

[47_MasoN_47]

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.