Vacuum Elbows Required with Silicone Hoses?

SwampRat5605 · Post by **SwampRat5605** » 21 Feb 2013, 07:46

I tried searching for the answer to this question, but I could not find the answer. I plan on replacing all of my vacuum hoses in the spring with special attention being placed on the secondary air system hoses. I'm currently pricing out the differences between using silicone hoses and regular rubber hoses. If I use rubber hoses I know I will have to replace all the vacuum elbows (both straight and angled elbows) on the various valves and on the charcoal canister. The price of these connections is more than I expected even when factoring in the standard elbow kit offered by IPD. I feel like I remember reading a previous thread where someone said they recently replaced all their vacuum hoses with silicone and did not need to use any rubber elbows. If this is true, then the cost of using the silicone hoses will be about the same as using rubber hoses with all the connections. So my question is, do I need to use the vacuum elbows with silicone vacuum hoses? Thanks in advance.

Also, I have a 1998 s70 non-turbo. I've read that I'll need the following hose sizes: 4mm, 6mm, 8mm, and 10mm. Can anyone confirm this?

Post by **jblackburn** » 21 Feb 2013, 07:49

Nah. It can make most of the bends without kinking.

Sizes sound right. You'll need the most of 6 mm.

http://volvospeed.com/vs_forum/index.ph ... se-how-to/

Post by **mercuric** » 21 Feb 2013, 09:57

Shop around online... And don't forget ebay.. Last time I did this I got an assortment of silicone goodness for almost nothing there.

I also prefer to use brass or stainless fittings if I need couplers, bends, etc. They don't get brittle and crack so quickly (texas heat is brutal!) and along with the purdy silicone hose, add a nice visual touch.

SwampRat5605 · Post by **SwampRat5605** » 22 Feb 2013, 06:43

Thanks for everyone's help so far. I have one more question. It's probably a long shot, but I want to know the hose size of the red hose in the attached picture. Based on the link posted by jblackburn it's either 4mm or 6mm. Anyone know?

Post by **jblackburn** » 22 Feb 2013, 06:47

Is that a hose to the EVAP canister? If so, I believe that one's 8.

Post by **cn90** » 22 Feb 2013, 06:58

Although I am a purist when it comes to ignition parts (I only use Bosch spark plugs, Bougicord wires, Bosch cap/rotor), I must admit that when it comes to vacuum hoses and their elbows, I use generic hose with appropriate sizes.

All of the elbows in my car come from generic hoses.

Post by **rmmagow** » 22 Feb 2013, 07:52

SwampRat, that diagram you posted. Is the square charcoal canister located under the driver's side front near the fender in your car?
Thanks,

SwampRat5605 · Post by **SwampRat5605** » 22 Feb 2013, 07:59

I currently don't know where my charcoal canister is located. I tried looking under the hood the other day, but I couldn't find the canister on the driver's side since the battery is in the way. Though based on the vacuum diagram on the hood of my car, I'm 95% sure the canister i located under the driver's side front near the fender. I'm doing any oil change tomorrow, so I'll be able to get a better look when doing so.

SwampRat5605 · Post by **SwampRat5605** » 23 Feb 2013, 13:32

I can confirm that my charcoal canister is located under the driver's side front near the fender. Also, it is rectangular in shape and not circular.