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Discussion Starter #1
My car is nearing the 106k mark and I don't know when the lines were replaced but one of the vacuum lines crumbled on my hand a few k miles ago and so i've been thinking about replacing all the accessible ones. Is this a big job and is there a kit somewhere I can buy or anything like that?
 

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FlyPenFly said:
My car is nearing the 106k mark and I don't know when the lines were replaced but one of the vacuum lines crumbled on my hand a few k miles ago and so I've been thinking about replacing all the accessible ones. Is this a big job and is there a kit somewhere I can buy or anything like that?
Heat is the primary enemy of rubber - so at the 7 year mark,or so, you should be needing all new vacuum lines and the upper radiator hose.
Most , if not all is 3.5 mm ID vacuum hose, use the best (silicone) where there is the most heat - make the lines on the long side - they usually fail at the ends..
You will, as I have read, need about 3.5 ' or 1.1 meter.
Also, the little plastic PCV valve will need some serious cleaning if not replaced..
 

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www.hosetechniques.com , 3.5mm Silicone Vac Hose, you need 15ft to be safe, so if you mess up a few times. Whole job takes less than an hour. This is only for the 4 major vac lines, if you wanna do things like the windshield washer lines and stuff than you'll need more
 

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You need about 5 feet, not including the hose to the MAP sensor, which is silicone or similar from the factory. Stock hose was 4 mm rubber, H-459 at Napa. Silicone is a better replacement.

240 mm pcv valve to valve cover
60 mm valve cover to PCV valve
220 mm TB to MAP sensor
800 mm TB to turbo bypass valve
400 mm TB to FPR

(the last one is under other wires and hoses, and the 400 mm was longer than stock to make it easier for me to rout)

http://www.saabcentral.com/forums/showthread.php?t=49678
 

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Discussion Starter #5
A guide anywhere? Any place to order online for the hoses besides the vacuum lines. Yeah I already did the PCV and the lines for that.
 

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Discussion Starter #7
To bring this back up, is there a diagram of all the vacuum lines? And oh, should I be picking up the 3.5 or the 4.0 mm lines from hosetechniques?
 

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There is a small diagram on a label under the hood.

Opinions on the 3.5 v. the 4-mm inside dia hose vary. With a true vacuum hose size does not matter so much, because all it does is transmit the pressure inside the throttle body to some other part.

The only one you don't want to make smaller is the PCV line, there are enough problems with that already. I am using a bigger hose there. See the link for some pics and explanation (running out of storage space to post pics and thumbnails here).

http://www.geocities.com/ng900set/Vac_hoses/vac_hose.html
 
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