Vacuum Lines

[bar10dah]

Still working on the intake air leak in my '99 Box w/ 70K miles. Related codes P1124 and P1126. I think Porsche today said codes 27 and 35.

I'd like to replace vacuum lines labeled 25, 26, and 27.



What size lines do I need to order? PET doesn't say a part number, just says:

#25 120 mm
#26 40 mm
#27 240 mm




Looking at Pelican's site, they list sizes (I understand ID is interior diameter and OD is outer diameter):

3.5 mm ID, 7.5 mm OD
5 mm ID, 10 mm OD
7 mm ID, 12 mm OD
9 mm ID, 14 mm OD
12 mm ID, 17 mm OD
14 mm ID, 17 mm OD



So, the numbers don't translate directly. How do I figure this out? How much of what size lines do I need?

[paulv]

The 120, 40, and 240 mm sizes are the hose lengths. Do you have any info on parts 19 & 21 in that diagram, like the diameter of the mating nipples that the hose need to connect to? The other alternative is to remove a hose and measure the ID and OD.

Regards,
paul...

[bar10dah]

Ah, makes sense. Thanks Paulv. Looking at the hoses, they do appear to be about those lengths.

[bar10dah]

Based on the information from Paulv, I relooked at the PET. Maybe that part number above those hose lengths is the part number, 000-043-205-01, for that hose. Appears then that the size is 4 x 1 x 210 mm.

So, if those hoses are 4 mm, will a 3.9 mm do the trick? Autozone didn't have any metric sizes, so I bought a 5/32" OD hose which is also marked 3.9 mm.

[paulv]

That's a good question since the difference is 0.1mm (0.0039") which doesn't seem to be critical since it's within 2.5% tolerance. You're probably safe buying the 5/32 hose. Good luck.

Regards,
paul...