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..