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Vacuum line / hose diameter

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHVacuum line / hose diameter

Leading reported evidence

Replace barbed tees

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

951 ownership made me paranoid about vacuum leaks, so I also replace barbed tees with brass and zip tie all connections.

Original post Read captured discussion
Vacuum line / hose diameter
Read full discussion summary

Leading evidence: 'Replace barbed tees' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace barbed tees' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Replace existing 15 year old lines while everything is apart

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

So I am tracking down a vacuum leak on my '99 cab and figured I might as well replace the existing 15 year old lines while everything is apart.

Original post Read captured discussion
Vacuum line / hose diameter

Replace hard plastic hoses

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Also is there any reason not to replace the hard plastic hoses with flexible material?

Original post Read captured discussion
Vacuum line / hose diameter

Use (id/od)

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Does anyone happen to know the right size of hose to use (ID/OD)?

Original post Read captured discussion
Vacuum line / hose diameter
Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace barbed tees

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

951 ownership made me paranoid about vacuum leaks, so I also replace barbed tees with brass and zip tie all connections.

Original post Read captured discussion
Vacuum line / hose diameter

Replace existing 15 year old lines while everything is apart

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

So I am tracking down a vacuum leak on my '99 cab and figured I might as well replace the existing 15 year old lines while everything is apart.

Original post Read captured discussion
Vacuum line / hose diameter

Replace hard plastic hoses

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Also is there any reason not to replace the hard plastic hoses with flexible material?

Original post Read captured discussion
Vacuum line / hose diameter

Use (id/od)

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Does anyone happen to know the right size of hose to use (ID/OD)?

Original post Read captured discussion
Vacuum line / hose diameter
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So I am tracking down a vacuum leak on my '99 cab and figured I might as well replace the existing 15 year old lines while everything is apart. They are a combination of hard plastic and flexible hoses. Does anyone happen to know the right size of hose to use (ID/OD)? Also is there any reason not to replace the hard plastic hoses with flexible material? I'm planning on going non-OEM on this one unless there is a really good reason to do otherwise. Many thanks in advance.

POST 2Original post

I've done that exact thing on many past cars, I typically just measure a few of the fittings for ID then grab some bulk hose from the local auto parts store. A cheap and small caliper comes in handy here for measuring, and most stores stock in standard not metric sizes so measure accordingly. 951 ownership made me paranoid about vacuum leaks, so I also replace barbed tees with brass and zip tie all connections. Vacuum hoses are nothing exotic, it's easy to find what you need locally.

POST 3Original post

Pelican Parts - search for silicone vacuum hose. They have a good selection, black, white, red and blue in the 3.5 mm ID/7.5 mm OD.

POST 4Original post

We offer a good assortment of vac hose, by Contitech , which you may view here . Also, our steps to finding vacuum leaks may be of interest, Finding Vacuum Leaks on the Porsche 911 Carrera . Hope that helps. Mark/Pelican Parts

POST 5Original post

If memory serves me correctly the OEMs are 3mm and the aftermarkets are 5/32". I bought mine self-serve & by-the-foot at Pep Boys. The vent hose for the PS pump is 7/32".

This is a source reference. Confirm exact model applicability in the original material.