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Word of warning.....
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Word of warning.....
Our cars are getting on so, while I was doing the DISA and VANOS valve upgrades, I went over the the external hoses. What I found may well be typical of cars from that time. The first picture shows the vacuum brake booster hose....looks reasonable...until you turn it 90 degrees and then not so good. The hose was almost entirely collapsed, leading to very little vacuum being induced. Fortunately there was still enough to operate the brakes. Note: For whatever reason the photos have loaded opposite to their number, so look at the second picture first.
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Last edited by rdgreen on Thu Nov 05, 2020 3:54 am, edited 1 time in total.
Sterling Grey 2004 e85 3.0i manual.
- bigwinn
- Lifer
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Word of warning.....
Good spot and worth a check
Had they perished or just collapsed due to constant vacuum?
Had they perished or just collapsed due to constant vacuum?
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Word of warning.....
Visually the surface was almost as new....it appears to have just collapsed internally, over time, under the vacuum.
Sterling Grey 2004 e85 3.0i manual.
- bigwinn
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Word of warning.....
Off to check mine now!
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Word of warning.....
I can feel a group buy discount coming on.
- ph001
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Word of warning.....
Flexi hose not exactly the optimal solution for vacuum really! BMW should have used something more rigid.
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Word of warning.....
Happy to pick up from Soper its just down the road!
Lockdown permitting of course...
If the forum helped you, why not help the forum back. Thats the Z4 way!
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Word of warning.....
Unfortunately you need a flexible hose between the engine take off and the brake booster as the engine isn't solidly mounted to the chassis and the booster is. Obviously the original has lasted for some time, but nothing lasts forever......brake lines next for a check.
Sterling Grey 2004 e85 3.0i manual.
- Roberltd2
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Word of warning.....
Useful post. Thanks.
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1994 Eunos J2Ltd - sold and now undergoing restoration.
1963 Triumph Thunderbird.
- Ewazix
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Word of warning.....
Interesting that BMW issued a TIS technical bulletin to dealers about this apparently common condition of squished vacuum hoses, quote
"A deformed vacuum hose still has sufficient reserves for the brakes to function correctly, in no instance is the braking effect jeopardised by the deformation. In case of customer complaint, do not replace the vacuum hose!
Technically they are almost certainly right, but it makes them look like a cowboy shower of s4it!
"A deformed vacuum hose still has sufficient reserves for the brakes to function correctly, in no instance is the braking effect jeopardised by the deformation. In case of customer complaint, do not replace the vacuum hose!
Technically they are almost certainly right, but it makes them look like a cowboy shower of s4it!
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
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Word of warning.....
Ewazix wrote: ↑Fri Nov 06, 2020 4:11 pm Interesting that BMW issued a TIS technical bulletin to dealers about this apparently common condition of squished vacuum hoses, quote
"A deformed vacuum hose still has sufficient reserves for the brakes to function correctly, in no instance is the braking effect jeopardised by the deformation. In case of customer complaint, do not replace the vacuum hose!
Technically they are almost certainly right, but it makes them look like a cowboy shower of s4it!
Hose.PNG
Sterling Grey 2004 e85 3.0i manual.
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Word of warning.....
Think my car has this. I noticed feeling in the brakes was lacking, and then I remembered road side assistance did remark something about a deformed hose under the bonnet (when they were checking my broken alternator). It just looks like the one in the picture.
Think its wise to replace ASAP, did I see correctly the partno is 34336763992?
When changing, do I need to order other parts as well?
Many thanks in advance!
Think its wise to replace ASAP, did I see correctly the partno is 34336763992?
When changing, do I need to order other parts as well?
Many thanks in advance!
Current
2010 E89 Z4 35iS Melbourne Red (weekend)
Former
2004 E85 Z4 3.0i SMG Toledoblau (weekend)
2001 E46 Coupe 325Ci Orientalblau (project car)
2017 Mazda MX-5 ND 1.5 GT-M Soul Red Crystal (weekend)
2003 Peugeot 206 GTI
1998 Peugeot 106 Sport
2010 E89 Z4 35iS Melbourne Red (weekend)
Former
2004 E85 Z4 3.0i SMG Toledoblau (weekend)
2001 E46 Coupe 325Ci Orientalblau (project car)
2017 Mazda MX-5 ND 1.5 GT-M Soul Red Crystal (weekend)
2003 Peugeot 206 GTI
1998 Peugeot 106 Sport
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- Joined: Sat Feb 22, 2020 7:52 am
- Location: Adelaide South Australia
Word of warning.....
To be honest I just went to the local auto spares outlet and bought a vacuum hose of the correct diameter that followed the contour almost exactly. Part number is ZHB12EFV and it cost me less than $20 (about 12 pounds) all up with a couple of hose clamps to replace the BMW ones that you will need to cut off carefully. You could buy the genuine BMW ones....but you would probably need to mortgage the house first.mpc007 wrote: ↑Sun Jun 06, 2021 3:49 pm Think my car has this. I noticed feeling in the brakes was lacking, and then I remembered road side assistance did remark something about a deformed hose under the bonnet (when they were checking my broken alternator). It just looks like the one in the picture.
Think its wise to replace ASAP, did I see correctly the partno is 34336763992?
When changing, do I need to order other parts as well?
Many thanks in advance!
Sterling Grey 2004 e85 3.0i manual.
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- Newbie
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- Joined: Sun May 23, 2021 11:43 pm
Word of warning.....
What fou you mean by cutting them off? Is there pressure on the hose when removing it?rdgreen wrote: ↑Sun Jun 06, 2021 10:16 pmTo be honest I just went to the local auto spares outlet and bought a vacuum hose of the correct diameter that followed the contour almost exactly. Part number is ZHB12EFV and it cost me less than $20 (about 12 pounds) all up with a couple of hose clamps to replace the BMW ones that you will need to cut off carefully. You could buy the genuine BMW ones....but you would probably need to mortgage the house first.mpc007 wrote: ↑Sun Jun 06, 2021 3:49 pm Think my car has this. I noticed feeling in the brakes was lacking, and then I remembered road side assistance did remark something about a deformed hose under the bonnet (when they were checking my broken alternator). It just looks like the one in the picture.
Think its wise to replace ASAP, did I see correctly the partno is 34336763992?
When changing, do I need to order other parts as well?
Many thanks in advance!
Current
2010 E89 Z4 35iS Melbourne Red (weekend)
Former
2004 E85 Z4 3.0i SMG Toledoblau (weekend)
2001 E46 Coupe 325Ci Orientalblau (project car)
2017 Mazda MX-5 ND 1.5 GT-M Soul Red Crystal (weekend)
2003 Peugeot 206 GTI
1998 Peugeot 106 Sport
2010 E89 Z4 35iS Melbourne Red (weekend)
Former
2004 E85 Z4 3.0i SMG Toledoblau (weekend)
2001 E46 Coupe 325Ci Orientalblau (project car)
2017 Mazda MX-5 ND 1.5 GT-M Soul Red Crystal (weekend)
2003 Peugeot 206 GTI
1998 Peugeot 106 Sport
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- Member
- Posts: 263
- Joined: Sat Feb 22, 2020 7:52 am
- Location: Adelaide South Australia
Word of warning.....
You need to cut off the hose clamps holding the hose on because BMW use clamps that are single use only. If you have pressure on a vacuum line you have other issues to worry about......mpc007 wrote: ↑Mon Jun 07, 2021 11:41 amWhat fou you mean by cutting them off? Is there pressure on the hose when removing it?rdgreen wrote: ↑Sun Jun 06, 2021 10:16 pmTo be honest I just went to the local auto spares outlet and bought a vacuum hose of the correct diameter that followed the contour almost exactly. Part number is ZHB12EFV and it cost me less than $20 (about 12 pounds) all up with a couple of hose clamps to replace the BMW ones that you will need to cut off carefully. You could buy the genuine BMW ones....but you would probably need to mortgage the house first.mpc007 wrote: ↑Sun Jun 06, 2021 3:49 pm Think my car has this. I noticed feeling in the brakes was lacking, and then I remembered road side assistance did remark something about a deformed hose under the bonnet (when they were checking my broken alternator). It just looks like the one in the picture.
Think its wise to replace ASAP, did I see correctly the partno is 34336763992?
When changing, do I need to order other parts as well?
Many thanks in advance!
Sterling Grey 2004 e85 3.0i manual.