Vacuum Lines Replacement

Post by **MadeInJapan** » 04 Nov 2006, 09:32

It is there although difficult to decipher from the vac line diagram. It is connected to a rectangular silenoid called the TCV on the left/mid section of the diagram that has 3 hoses coming off of it. The TCV is attached under the MAF hose to the side of the airbox on the driver's side (as opposed to the front side of the car). Take a look and you'll see where 3 vacuum lines connect to this device. One of them makes its way to the very bottom of the turbo...only accessable from under the car. This one was the real bitch to replace. If you take one hose off at a time, and replace all of the rubber hoses, you eventuall run upon this one. Good luck!

dasapir · Post by **dasapir** » 06 Nov 2006, 05:11

MIJ, could you do me a big favor? I have started doing the stylinmotors silicone lines. When you wrote to Luketrash in the post on the oiltrap it appears that you might have used some silicone there also. If so, could you use the diagram from FCP Groton on their oiltrap and, using their #, list the hoses which you converted to silicone. I am sortta stumped with a few of the bigger tubes from stylin. Where do they go?
Also, how did you access the canister. Maybe by the end of the day I will get that figured out. Thank you ahead of time. Almost everything is apart except for the back of the PCV system.
dan

Post by **MadeInJapan** » 06 Nov 2006, 15:26

Hey there...sorry, still at work and have a dinner engagement tonight so I'll have to tackle your question after that. I used the fcprgroton kit for my car. I did however replaced as many of the rubber elbows with silicone as I could. Except for a few of the hoses that come with the pcv kit, I am convinced however that you could use the stylin' kit for much of this R&R. The intake manifold has to come out to get to the oil separator and its related hoses unless you can devise some way to pull of the old and attach the new as well as tighten a clamp or a zip tie by long hemostates or stiff wires (I suppose it could be done but I would think it would be very difficult and extremely frustrating). I'll post back later.

Oh, and I had a bunch of the largest diameter tube stylin' hose left over. Ended up using some of that for my A-pillar boost gauge hose to go through (to protect it from the heat) later on.

dasapir · Post by **dasapir** » 06 Nov 2006, 16:06

MIJ ,thank you for your reply. I do hope you have/had an enjoyable evening.

I have the manifold already off (last night), TB off, Air box out, did get the canister down alittle bit just so could reach one connector, then tightened is back up. Know what you mean by the turbo, though not as bad as I anticipated. I am left handed and so the reach was probably a little easier. I tried with my right and it was near impossible. I have not had enough of the smallest diameter tubing, so I reused the hard tubing and just cut end boots.

I, too, have alot of the large diameter tubing left and so I might try and use it for the PCV and oil trap. Cannot think of what else to use it for.

I do have a question, a few lines coming off the air pump have boots. Did you replace those? AndWhere is the pressure regulator? I am not sure where that line is that goes from the manifold to it and over to the PCV pipe somewhere. Maybe I got it, but do not know where.

Other wise everything is going... I must say the vacuum lines have posed a bigger challenge that the manifold. Only sorry I did not get red. Stuck to the conservative side with black. Red or Blue would have been sortta neat!
take care and again much obliged for all your help.
dan[/i]

Post by **MadeInJapan** » 06 Nov 2006, 20:47

dasapir wrote:I do have a question, a few lines coming off the air pump have boots. Did you replace those? And Where is the pressure regulator? I am not sure where that line is that goes from the manifold to it and over to the PCV pipe somewhere. Maybe I got it, but do not know where.

Do you have a picture? From the air pump I also replaced all of the hoses...but what I recall is the SAS valve (mushroom shaped brass thing that sits up near the firewall right above the turbo). I don't recall a pressure regulator. Maybe yours and my car are a bit different. I do recall a rubber boot on the power steering side of the manifold that goes to the oil separator from the pcv nipple. Hope this makes sense.

Post by **luketrash** » 06 Nov 2006, 20:57

What I assume is a fuel pressure regulator on the fuel rail on my car was the item that had a broken vacuum line. (non turbo car though... so not the same) Anyway, the FPR had a hard plastic vacuum line that ran over to what I called the vacuum tree that has like 5 fittings that hooks to the pcv stuff and intake manifold.

dasapir · Post by **dasapir** » 07 Nov 2006, 07:07

In looking at the vacuum line diagram I was not sure because of the routing the lines on the diagram, however, I think I figured it out (problem is that the Haynes manual is on its way from England and will be 3 more weeks in coming). the pressure regulator, I beleive sits on the driver's side of the block with the line going in that direction.

I do have 2 other questions regarding lines (what a lovely piece (sic) it was putting them on). First is that the line (follow your diagram) on the far left, outside, coming from the purge valve to check valve to PCV pipe does not fit snuggly on the PCV pipe nipple. It needs a 6mm line because that is what fits the check valve. Besides I am plum out of 4mm. Ran short of 3.5mm. with an abundance of 8mm and something larger. Anyway that is #1.
Question #2 is regarding the nipples coming off/out of the manifold.
The large brass one facing downward, what is this for? The reason I ask is that I switched that line to silicone and then when I cut the line off the other end going to a plastic christmas tree connector I noticed that it might be a high pressure line since it had fiber-weave reinforcement. If I cannot use the silicone then I will need to replace it since I cut the end when removing it. It weaves around undr the air-filter box headed somewhere toward the dirver's side.
After I go to vote will start to put everything back together.
thank you.

thank you

dasapir · Post by **dasapir** » 07 Nov 2006, 09:39

Sorry to have bothered anyone, I found the answers to my question from the preceeding post. To question #1 I was able to squeeze on a smaller diameter silicone line and so now it fits snuggly to the PVC air tube. To question #2 The downward facing brass nipple on the intake manifold goes to the brake servo, which is vacum assisted. I bought a new stiff 3/8 inch diameter fuel line and will take off the silicone line. It may not be stiff enough. Sorry for the unnecessary post.