924Board.org

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

I'm trying to get down part numbers for the vacuum lines in the engine. I'm having trouble working this out because the numbers are hard to read and I haven't found any online parts catalogs with pictures of these things. Right now I have:

944.105.149.01 - $18.00, cheapest at dealer
944.110.217.00 - parts catalog says fuel hose?, looks more like a vac line and plugs into the 3-way connector at the front of the engine. can anyone confirm/deny this part number? 14.00 online
944.107.162.01 - to different 3-way connector on car, this part number doesn't seem to be in any catalog
944.110.361.02 - $32.00, very expensive for a rubber hose with a metal thing inside!
944.110.214.01 - short vacuum line shaped like an 'S.' Awfully small to be $10.75. Mine has a 2-inch split on the side!

The other 3 lines I pulled from the car have no part numbers so I guess they're standard sizes. The smaller sized, hard lines I will just get from a local store since they're not numbered.

Has anyone replaced all the vacuum lines on the engine and still know what the part numbers are, and where they cost the least? Is it possible or a good idea to just switch them all to standard vacuum line that's available for $$/foot at regular parts stores? Thanks!

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

Ditch all the hard plastic vac lines and get brass or plastic T connectors and 4mm ID silicon hoses like the sport compact crowd uses. The work great, route more easily and last a lot longer. But get good hose, not gee wiz brand X crap. Hose Techniques seems good.

The hoses that run between the ISV and intake boot and the ISV and plenum are shaped and have different IDs on either end. You can't just use some random-ass hunk of hose. I got them all from Paragon, as well as the one that goes to the top of the oil mist seperator, and you are right, they are not cheap.

The part numbers I got were:

944.110.217.00
944.107.187.01
944.110.163.05

I don't recall which went where but it is pretty plane to see when you are installing them.
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Michael Manning
1988 924S Undergoing weight loss program

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

I have them all labelled really well so there's no mixing them up when it comes to putting everything back together.

Thanks for the recommendations - I haven't come across many places online that sell these things yet. Where did 944.110.163.05 go? I don't have any numbers similar to that one.

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

Oops, sorry, that was the wrong part number off of the invoice. 944.110.163.05 is the intake manifold gasket part number of which you need 4.

The part numbers are:

944.110.217.00 which goes from the idle stabilizer valve (ISV) to the intake boot. $13.05

944.110.214.01 which goes from the plenum to the ISV. $10.13

944.107.187.01 which goes from the oil mist seperator to a connector pipe which then connects to the intake boot. $14.90

Paragon calls the ISV the Idle Speed Regulator by the way. If you order through them call and talk tell them what you need since I am pretty sure they don't list the hoses on their site. You'll wind up talking to Chuck or maybe Jason who are both really nice and super helpful.
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Michael Manning
1988 924S Undergoing weight loss program

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

Great info - I'll have to call them up as soon as I can. What are the other two lines I had?

944.105.149.01
944.110.361.02 - this one is expensive, looks like the other stock vacuum lines except wtih a metal thing inside. I wouldn't replace it if it weren't for the fact that all these lines are 17 years old and I might as well since I'm in there...

That line going from the plenum to the ISV is trashed. It has cracks everywhere and a 2 inch long split going down one side. I really wish I could've heard what the engine sounded like with that blown line.

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

I have no idea what that expensive hose is. I don't have one on my car. It only shows up as "hose" on the PET and attaches to a Y pipe with a little "restrictor" shoved up is end, part number 944.110.241.02.

If I'm reading the diagrams right, the Y "venturi tube" part number 067.133.753.A, sits in the middle of 2 sections of hose (other than that little hose), one that connects to the plenum then connects to the Y (944.110.219.01) and the other connects to the Y and then to the brake booster (which doesn't show a part number on the PET). On my car I only have a single length of hose between the plenum and the brake booster, number 944.110.219.00. I suspect the part I have may have superceded the parts you have. What year is your car? And what does the small hose attach to?
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Michael Manning
1988 924S Undergoing weight loss program

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

Mine is an '87.

I added a picture to my photo album that has a good shot of the line in question - It's in the engine head folder
http://photos.yahoo.com/matt_j79@sbcglobal.net
The line with the restrictor is in the front of the picture VacLines1.jpg (directly above the balance belt, the part number shows up well) and runs from that 3-way connection above the belt cover back to a 3-way connection under the intake manifold. This hose and one running to the master cylinder connect at an angle. It can be seen pretty clearlyfrom the side in the other picture, VacLines2.

944.105.149.01 runs from the airbox to the belt housing. You don't have this line, or was it just not replaced? On my car, the small line 944.110.214.01 goes from the intake manifold to a part above the center of the engine labeled "Bosch 0 280 140 501." I'm not sure what exactly it does to be honest.

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

The part labeled "Bosch 0 280 140 501" is the ISV with the Bosch part number versus the Porsche part number. It controls cold idle. On my car the hose that comes off of it (944.110.217.00) plugs into that black plastic T, which also connects to the intake boot. However, the other nipple on the T is capped, so there is nothing connected to it.

The hose off of the brake booster only connects directly to a metal nipple on the plenum on the intake manifold. The hose off of the oil mist seperator connects to the metal T connector with a smaller hose coming off of it for the fuel vapor recovery system, IIRC, and the other large end connecting directly to the intake boot. I don't have the other hose and Y connector, etc. and that is how mine came stock. I bet a dollar you can delete those parts.

944.110.214.01 is supposed to go from the intake manifold plenum to the ISV as you described.

944.105.149.01 from the belt cover to the airbox can be deleted. Porsche issued a service bulletin stating so much several years ago. You can leave the nipple on the belt cover open or go by a plastic chair tip, I think 1 or 1 1/8 inch, at the hardware store and cap it. There is a Porsche part number but I don't know what it is since the chair tip works just fine. I know the correct size chair tip (no I'm not pulling your leg) for the airbox is 1 1/8 inch.
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Michael Manning
1988 924S Undergoing weight loss program

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

Interesting - it'll take me a couple of days to comprehend everything. The plastic tip shouldn't be hard to come by, I work in the aerospace business and there are these round caps which actually go with something on the planes that workers take and stick over the end of their mechanic stamps. They don't need to do that, it's just more opportunity for FOD on the planes...

It'd be a lot easier if the online parts stores had pictures of these vacuum lines, rather than part number and "rubber hose!" There are a lot more parts to deal with than I'm used to, this car is a lot newer than anything I've worked on in the past.

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

Maybe this will help

I hope this doesn't get anybody in trouble with P-cars. Sorry John D for borrowing server space.
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Michael Manning
1988 924S Undergoing weight loss program

Manning · Joined: 29 Feb 2004 Posts: 151 Location: Akron O-Hi-O

In the first picture, "hose" part 21 is part number 944.110.214.01 and "hose" part 22 is part number 944.110.217.00.

Part 18 is the ISV which canbe found with the Bosch number you listed before.

The hoses at the bottom of that pic are also show at the bottom of the second picture. The "hose" part 21 in the second picture is what I have on my car, and is part number 944.110.219.00

On your car are parts 19 and 20. I only show a part number for part 20 which they list twice for some reason; once with the same part number as part 21 (like I have on my car) and once with part number 944.110.219.01. The hoses on you car are connected in the middle by part 18, part number 067.133.753.A. They do list a hose that isn't illustrated with a general part number 999.239.011.40 between part 18 and 20 on the parts list. This leads me to beleive they thought better of the earlier design (1987) and went with the design on my '88.

The "hose" of interest in the third picture is part 18, part number 944.107.187.01.
_________________
Michael Manning
1988 924S Undergoing weight loss program

The Fife · Joined: 17 Mar 2004 Posts: 241 Location: San Antonio, Texas

Thanks - I made sure to save the pictures, by the way! It looks like some kind of design change was made. Actually, the gray 3-way connector that the expensive hose (944.110.361.02) connects to has VW and Audi on it.

I've got all the Porsche vac lines I need on order. The dealer has them for under $5 more than I'd get them for online and there's no shipping involved so that's where they're coming from. The expensive line looks just fine, and I don't have to remove anything to get to it so it'll go back in until it needs replacing. The other lines in and around the intake are showing more wear from being up against the hot engine for so long.

I swear, this project seems like it'll never end. I need to scare up a flywheel lock so I can have a look at the water pump and front end seals. Then there's the new head, getting it cleaned, and installed.