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dubluvv
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PostPosted: Wed May 25, 2011 5:28 pm    Post subject: Brake Booster Vacuum Hose Reply with quote

1976 2.0L FI

OK, so I *accidentally* threw out my OG hard plastic booster vac hose that resides in the engine bay. The two piece one that has the check valve inbetween.
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So, since I haven't been able to find another OG one, I'm trying to replace this line with a reinforced brake vacuum hose. The problem that I'm having is that from what I've read this vacuum hose is 12mm ID, 13mm OD (this is what Ratwell says). The issue is that I can get a 12mm (roughly) hose that the check valve will fit into, but it is so thick (larger than 13mm OD) that it won't fit into the rubber "tee" at the intake manifold. I am reluctant to stretch the tee out trying to cram it in there. I looked at some other hoses that would work but they are not reinforced and I know that won't work.

I was thinking of getting some copper hose or something similar and using two small pieces of rubber hose to connect the check valve. I did peruse the copper tubing at the home depot and there may be a few sizes there that will work, but i'd definitely do something else if it was simpler. Thoughts?
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'76 Westy 2.0L FI "Lucy" Project Thread
'84 Rabbit L Diesel - Potential Greasecar Project

chazz79 wrote:
"Aw honey, I got another one of those bay-bus things on my shoe again...dammit"


Last edited by dubluvv on Wed May 25, 2011 6:56 pm; edited 1 time in total
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barefootwestie
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PostPosted: Wed May 25, 2011 6:40 pm    Post subject: Reply with quote

Check my blog out here for the part numbers I used for replacing the vacuum hose.

http://tangerinemoons.com/myvwbus/2011/03/18/stay-tuned-lots-to-share/
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dubluvv
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PostPosted: Wed May 25, 2011 6:56 pm    Post subject: Reply with quote

barefootwestie wrote:
Check my blog out here for the part numbers I used for replacing the vacuum hose.

http://tangerinemoons.com/myvwbus/2011/03/18/stay-tuned-lots-to-share/


I'm going to look into that, but your hookup is a little different where in your application the hose slides over a nipple on the carb, whereas mine the whole OD has to slip into a vacuum tee, hence the thickness issue.

I think i'm going to try getting a small chunk of 15/32" hose tomorrow and see if it fits.
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'76 Westy 2.0L FI "Lucy" Project Thread
'84 Rabbit L Diesel - Potential Greasecar Project

chazz79 wrote:
"Aw honey, I got another one of those bay-bus things on my shoe again...dammit"
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SGKent
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PostPosted: Wed May 25, 2011 7:00 pm    Post subject: Reply with quote

we had to get ours off a bus that was being parted.
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busman78
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PostPosted: Wed May 25, 2011 7:56 pm    Post subject: Reply with quote

Gates 15/32 DOT Booster hose from NAPA works great.
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dubluvv
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PostPosted: Thu May 26, 2011 5:48 pm    Post subject: Reply with quote

busman78 wrote:
Gates 15/32 DOT Booster hose from NAPA works great.


OK, going to give that a try. And it fits inside of the vacuum tee OK i assume?
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'76 Westy 2.0L FI "Lucy" Project Thread
'84 Rabbit L Diesel - Potential Greasecar Project

chazz79 wrote:
"Aw honey, I got another one of those bay-bus things on my shoe again...dammit"
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germansupplyscott
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PostPosted: Thu May 26, 2011 8:00 pm    Post subject: Reply with quote

dubluvv wrote:
And it fits inside of the vacuum tee OK i assume?


no.

try to get the original hard plastic tubes, it will be so so much easier. without it you have lots of mucking around with gender changes and size changes. each end of the rubber Y is a different size, the plastic booster hose is different sizes depending which end you look at - one end is flared.

you might be able to use the rubber booster hose, a check valve grommet and a short piece of thin wall 1/2 steel tube to make the plenum end of the new hose assembly fit into the rubber Y.
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busman78
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PostPosted: Thu May 26, 2011 8:09 pm    Post subject: Reply with quote

Scott nailed it, a piece of tube will, the hose has too big an OD to fit in the tee.
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dubluvv
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PostPosted: Fri May 27, 2011 6:03 am    Post subject: Reply with quote

That is what I thought.

I have been trying to source the original tube for the better part of a year to no avail. Every Bus that I have found locally that is getting parted either had no booster hose at all or it is rigged up with any number of different hoses.

I guess I'll get some hose and some tubing for now and try and make it work.

Thank you all for the input!

Mitch
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'76 Westy 2.0L FI "Lucy" Project Thread
'84 Rabbit L Diesel - Potential Greasecar Project

chazz79 wrote:
"Aw honey, I got another one of those bay-bus things on my shoe again...dammit"
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ser123ser
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PostPosted: Fri May 27, 2011 6:20 am    Post subject: Reply with quote

I just went throught this whole deal. the hard plastic tubes do not exist as new and any old ones will probably give up the ghost in a year or two then you will be chasing vac leaks.

buy the 15/32 hose and clamp it with new clamps. these are vac lines so you don't need reinforced rubber. cheapo water pump hose is fine. The metric stuff as noted on the Rattwell site is great if you can find any at any price. if you can't get the 15/32 then use 1/2 inch. the purist will laugh at me but it works when clamped and unlike the high pressure fuel lines that absolutely should be metric they wont catch your bus on fire.

just get the hose put it on and move on. I just installed my FI 2 litre engine and after weeks of looking i just put on the 15/32 and everything is just tits.

steve outstanding in my field
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aeromech
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PostPosted: Fri May 27, 2011 6:40 am    Post subject: Reply with quote

I might have the hard plastic hose that you need. Send me a pm.
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PostPosted: Fri May 27, 2011 9:21 am    Post subject: Reply with quote

Call Ken at the Bus co. or Chris at Busted Bus or Avery's aircooled or way out salvage. Get an original one used and be done with it.
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PostPosted: Fri May 27, 2011 9:30 am    Post subject: Reply with quote

Hoody wrote:
Call Ken at the Bus co. or Chris at Busted Bus or Avery's aircooled or way out salvage. Get an original one used and be done with it.


X2 - the old plastic hoses are near bullet proof. It is amazing how well the original parts work. We paid maybe $5 for parts plus the cost of the replacement rubber bushings that go at the fittings.
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aeromech
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PostPosted: Fri May 27, 2011 9:37 am    Post subject: Reply with quote

replacement rubber bushings that go at the fittings.

Are those the same part or similar to the brake reservoir hard plastic tube rubber bushings?
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PostPosted: Fri May 27, 2011 9:38 am    Post subject: Reply with quote

aeromech wrote:
replacement rubber bushings that go at the fittings.

Are those the same part or similar to the brake reservoir hard plastic tube rubber bushings?


yes - they actually have the same part number but with a different alphbetical ending if I recall. The old ones turn to like a gum.
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PostPosted: Fri May 27, 2011 9:45 am    Post subject: Reply with quote

Last week I worked on a 1971 camper and the owner was complaining of brake fluid leaking. The bottom of the plastic tube where it connects to the lower MC reservoir didn't have any bushing installed at all. The upper reservoir had black electrical tape acting as the seal.
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PostPosted: Fri May 27, 2011 9:48 am    Post subject: Reply with quote

The grommets look like dissolved electrical tape when they rot.

The part for the brake fill line is 211611833 C

The part for the servo hose on a late bay is 211611833 D

See here a photo of both: http://bughaus.com/type214.htm
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aeromech
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PostPosted: Fri May 27, 2011 10:05 am    Post subject: Reply with quote

I'll be heading down to my local VW parts house this afternoon. I'll ask to look at both. I wonder if they are interchangeable?
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PostPosted: Fri May 27, 2011 10:09 am    Post subject: Reply with quote

aeromech wrote:
I'll be heading down to my local VW parts house this afternoon. I'll ask to look at both. I wonder if they are interchangeable?


hard to say - one has notches and one does not but when you hold both in your hand that question will go through your mind because they are so close to the same. I wondered that too.
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dubluvv
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PostPosted: Fri May 27, 2011 4:43 pm    Post subject: Reply with quote

Thank you all for the info- I have PM'd aeromech and we will see if I can get one from him. I would ideally like to have the original.

I have inquired about it at Bustedbus recently and Chris did not have any there.

Mitch
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'76 Westy 2.0L FI "Lucy" Project Thread
'84 Rabbit L Diesel - Potential Greasecar Project

chazz79 wrote:
"Aw honey, I got another one of those bay-bus things on my shoe again...dammit"
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