98 V70 NA vacuum tube replacement

Post by **98v70dad** » 01 Dec 2015, 17:14

I have replaced most of the major mechanical parts in the evap recovery system except the tubing and connectors. I am tired of getting random codes indicating leaks so I'm thinking of replacing ALL of the tubing.

I'm pretty sure others have done this. How many feet of what size(s) do I need to buy? I've already replaced the big hose over the driver side wheel well and all the little rubber shaped tubes on top of the charcoal canister.

Post by **98v70dad** » 02 Dec 2015, 15:43

Does everyone else just go and buy a lot of vacuum hose and either come up short or waste the leftovers?

Post by **erikv11** » 02 Dec 2015, 16:39

Actually, I will guess that very few people have done a full replacement, so "everyone else" is a pretty small slice of the viewers here. Anyway, I don't have the info you need, regrettably.

But in a general sense: Neither. When I need vacuum hose, I try to estimate how much, and then buy a little more so I don't come up short. However I don't "waste the leftovers" either, I put them in the toolbox for the next job. You're basically restoring your '98 through an impressively systematic run thorough it, I am sure you can appreciate that soon you may need more vac hose.

Post by **98v70dad** » 03 Dec 2015, 08:00

My issue is that I have a leak somewhere and I don't know where it is. I keep getting the codes for either a small or large leak. I may go 3 weeks with no codes and then get 5 in a 5 day period. I've already replaced the tubing and fittings that are prone to leaks as well as the most of the valves, etc that are prone to failure.

I'm just sick of messing around with it and figured I could spend an afternoon taking out old hoses and putting new ones in and probably (hopefully) be done with it.

When I replace one bad hose I do exactly what you do...I buy a little more than I need. I usually take a razor blade and cut off about an inch and take it along with me to the auto parts store so I am sure to get the right size. I leave the hose I'm replacing attached on one end with a piece of tape on the hose and one the fitting so I know where to hook it up when I get back from the store with the new hose. None of that will work work well if I'm trying to do them all at once.

Just knowing the different diameters to buy would help a lot. There are many sizes and measuring an 18 year old hose isn't real accurate.

Anyhow. I guess I'm breaking new ground. I've seen a bunch of pictures on the site of silicon vacuum hose upgrades. You generally have to order that stuff online and I figured since others have already done that they would remember what they had to order. I don't really want to spend the money for the silicon but I figured the knowledge is out there since others have done it.

Post by **cn90** » 03 Dec 2015, 10:33

Vacuum hoses are inexpensive.

Take some random hoses from your car, measure the I.D. and buy appropriate amounts.

What I do: my time is limited and with the time-gasoline lost running to the stores just to get different hoses...
So, I go to the store and buy packages of vacuum hoses, usually sold in 6-foot package, about $2-$4/package.
They can be sold by the foot too.
Buy different diameters, 4 packages and $16 later, I am good to go.

As erikv11 said, save the rest for other odds and ends jobs. Your time should be worth more than $16...lol...

Post by **98v70dad** » 03 Dec 2015, 16:04

cn90 wrote:Vacuum hoses are inexpensive.

Take some random hoses from your car, measure the I.D. and buy appropriate amounts.

What I do: my time is limited and with the time-gasoline lost running to the stores just to get different hoses...
So, I go to the store and buy packages of vacuum hoses, usually sold in 6-foot package, about $2-$4/package.
They can be sold by the foot too.
Buy different diameters, 4 packages and $16 later, I am good to go.

As erikv11 said, save the rest for other odds and ends jobs. Your time should be worth more than $16...lol...

I've never seen vacuum tube in a package. I guess I'll have to look for it. At the stores I shop its available by the foot behind the counter. What you suggested will work for sure. I currently have lots of left over vacuum tubing from old cars that is the wrong size or too short for the V70.

I'm a DIY person for everything around the house. I have a lot of left over stuff that I keep in my 8 x 10 workshop (wood working, plumbing, electrical painting and carpentry) which doubles as my wine cellar and wine making work space. Space is limited and lately I've been trying not to add to the stuff stored in it.

Post by **98v70dad** » 08 Dec 2015, 19:22

Thanks for the help regarding vacuum hoses. I found an excellent post by erikv11 that covers the issue of size and length of the different hoses required.

Post by **erikv11** » 09 Dec 2015, 07:48

MVS VRD to the rescue! I didn't think of that post, apologies.

To help the next googler: https://www.matthewsvolvosite.com/forums ... =1&t=65002

Post by **98v70dad** » 09 Dec 2015, 08:36

I have a tough time finding things on this website, especially the archived repairs. There are hundreds of pages to scroll through in the major repair area. The search features help, but its not a straightforward thing. Going straight to google helps but still doesn't really take you right where you need to be.

Anyhow, I just made a site contribution due to all the valuable info I have gotten here. Your vacuum tube post along with the posts I used for the timing belt change from rspi (videos), cn90 and deepsouth inspired me to contribute.

I had some related follow up questions on evap system leaks in a recent post (today) if anyone wants to comment on any of them. Each is a simple question but I like to try to provide all of the details so its a fairly long post. People seem to shy away from responding long posts.

Post by **Ozark Lee** » 09 Dec 2015, 17:08

98v70dad wrote:I have a tough time finding things on this website, especially the archived repairs. There are hundreds of pages to scroll through in the major repair area. The search features help, but its not a straightforward thing. Going straight to google helps but still doesn't really take you right where you need to be.

I need to talk to Matt about that. At least with the old repair database format you could use <ctrl> f and key word search the titles and find the appropriate repair pretty easily but the new format makes that tougher since <ctrl> f searches the loaded page. I run Ghostery so the search function doesn't work for me unless I turn it off. Even with the search function it brings up everything where the search term is mentioned in the body of the entry, not just the title and it the results are voluminous.

...Lee