Pcv And Rubber Lines, Replacement Questions

[rmorse]

So, I'm working on my 96 855R, and I have the intake manifold off so I can clean everything up pretty good. I have a bit of positive pressure, so I'm trying to make everything nice and tight and cleaned out. Anyway, I was wondering about these three lines....

The first one, I have no idea what it is. It hooks up to the bottom of the intake manifold, by the throttle body. It's pretty gnarly. Is it OK to replace this line with a silicone line? I have a bunch of silicone line laying around and I have the car all apart, so it's no big deal.

Here's two pictures of the line. What is it?








The other question is the two PCV lines...One is the small vacuum line, goes from intake manifold to PTC. Can I replace it with silicone as well? The other one, goes from top of the box to the fresh air pipe. I plan on replacing that dude with 5/8 heater hose. Hoses in question are below:

[mikealder]

The large vac pipe in the first picture looks like the vac hose to the brake servo, you should be able to follow it to the brake servo to make sure.
As for swapping it to silicon make sure the replacement hoses are good to work with Vacuum as not all are, if the hose collapses under vac you could find little or no servo assistance when you go for the brakes which isn't good, same applies to the smaller pipe, yes you can swap it as long as it is good for vac application - Mike

[xHeart]

I have all new PCV parts on '97 850 NA. After several attempts to find proper fit, I decided to stay with OE parts and returned ALL aftermarket items. Your PCV hoses are identical to ones on mine. Do you need the PN?

Item 9a at this link:
[url]http://www.volvopartswebstore.com/showA ... =11044[url]

[rmorse]

Thanks for the help, guys. I ended up just buying 5/8 heater hose and 1/4 fuel line to use. Worked great!

[JxKenny]

I think what you really need is a 16t and tune!