The mess under the intake

[jscribble]

Ask for 'reinforced' vacuum or oil line hose at the parts counter. See the red hose on mine.
]

Yeah, I did, and they didn't really have anything that fit the bill. Got 3 kinds of hose, stiffest was some heater hose.  They had to order 5/16 injection hose!

Sorry if it's in the thread already, but reinforced hose solved your collapsing problem? Mine doesn't quite fold over, but gets pretty squished after a few minutes.  Thank you for inspiring everyone with your write up. Probably the best "piece of mind" mod you can do to the car.

[tjts1]

It worked for me. I had the same problem initially with the black hose you can see on the first page of this thread. It would collapse under vacuum. The red stuff they gave me the second time around I couldn't squeeze with my hands no matter how hard i tried. I was a little annoyed that it was red but I didn't have a choice but to use it. If they don't have vacuum hose ask for power steering hose or AC hose. That stuff should be plenty stiff.
good luck
Justin

[jscribble]

Thanks. I might just grab enough red hose if I can find it to route all over the place. At least it will match.

[cncmastr]

What causes that nasty stuff inside the intake manifold and in the ports?

[jscribble]

What causes that nasty stuff inside the intake manifold and in the ports?

The crankcase is vented into the intake essentially. Over time, and mostly with dino oil, it builds up. Several people here have used a catch can (essentially a filter) in-line to stop oil from reaching the intake, but word on the street is running synthetic will keep your runners clean.

[JoeyBones]

http://m42club.com/forums/showthread.php?t=6334

where does the port above and to the right of your finger go?  

Also, btw, this was much more confusing than I originally thought, I've bought a bunch of fittings and such from HD just to try and make it "right"  Would be way easier to just cap off the water ports at the head, but seemed like a bad idea to me...

[cristimm]

For contrast: 2 clean ports in the foreground and 2 dirty in the background. The picture doesn't do it justice. That stuff is nasty, thick sticky and smelly. I will add a catch can to the new vent hose in order to separate the oil oil before it hits the intake.

That reason for that is the crankcase vent hose coming from the head cover. It is not a good design to put that hose in one side of the intake. BMW corrected the problem on E36 M42 by placing that hose in the TB. That way every cylinder gets his share of the oil fumes.

If it fits I strongly recommend getting an E36 throttle body and relocate that hose. See the bottom port.

[JoeyBones]

can anyone help? i want to butto this up this weekend!

[DPINEDA]

Just wondering if anyone had problems finding the 19/32” Vacuum Hose?
I've gone to Pep Boys, Advanced..., and AutoZone. No one seems to carry it. I got every other piece I need for this project except the vacuum hose.

[DPINEDA]

I found the red reinforced hose at Napa. I will try to work on this project next week and post results. Tks

[WeOnlyHaveLime]

Okay, sorry if this has been covered, but I see some confusing info. In the OP, the second picture says "One vacuum hose from the valve cover to the throttle body". However, the picture has red circles at the valve cover and the intake elbow. What's right?

I also have the later throttle body (First pic in post #246). It has (from what I can tell) 3 vacuum lines going to it. One large, downward-pointing angled connector, a tiny connector (apparently for crank case ventilation) and the medium sized connector. What ends up connected to these and where from?

I'm still reading through threads on this, but I'm a bit confused at this point.

[tjts1]

Okay, sorry if this has been covered, but I see some confusing info. In the OP, the second picture says "One vacuum hose from the valve cover to the throttle body". However, the picture has red circles at the valve cover and the intake elbow. What's right?

You are correct. The valve cover connects to the intake elbow. You don't want to put your valve cover under vacuum from the TB. I will correct it.

[WeOnlyHaveLime]

You are correct. The valve cover connects to the intake elbow. You don't want to put your valve cover under vacuum from the TB. I will correct it.

OK, thanks!

That upper connector on my intake elbow (the one closest to the TB) has never had anything hooked up to it in my car. It might be sealed off. We'll see

EDIT: Last question: So what's going to be connected to the medium sized connector on the middle of the side of the throttle body (one w/ numbers printed on it in post 246). I have that throttle body, as does the car in the e30owners writeup. He connected the downward-pointing angled one to the valve cover, and the ICV to the intake elbow, but I can't figure out exactly where that middle one goes.

I'm sure it would make more sense if I had the car with me, but it's a ways away and I need to get all the info I can before I get back to it to tackle all this.

[rjcaptsean]

If you look at this pic you will see that hose on the side of the TB going down to a valve with leads directly into the Carbon Canister on the fenderwell (next to the hose that says TDHY).

[Gooch]

Hey guys, I just did this over summer, and wrote the following up for a friend who is about to tackle "the mess under the intake".  I wish I took pictures to help document, but sadly I did not.

I got rid of the throttle body heating plates, so if you're looking to do the same, this is what you need to do:

11531714738 - coolant pipe from block
11531709157 - o-ring for pipe
13541743261 - throttle body gasket
11611717761 - upper/lower intake gasket
11611734684 - lower intake/block gasket
11531709052 - lower rad hose
64211386691 - coolant hose
13411721971 - vacuum hose from intake to ICV
13411721972 - vacuum hose from ICV to intake boot (lengthened with plastic/brass barbed fittings)
11151717858 - valve cover to throttle body (lengthend with plastic/brass barbed fittings)

Reuse a bunch of the plastic couplers, reducers, etc from the mess, you'll have a bunch extra from a lot of the stuff you'll be throwing away.

Brass barb fittings (http://www.plumbingsupply.com/barb.html)...I forget exactly what you need but with the intake off you'll be able to figure it out, you're gonna want a bunch of 1/2" splicers, a few reducers, and a 90 degree reducer, that you make out of a barb x fips and a 90 degree elbow barb x mips.  You want to use the reduceres and splicers to change between different size hoses, and also to space out like 5-6" of hose so that it doesn't collapse under vacuum.

Obviously you're going to need some  hose clamps, coolant (heater) hose, and vacuum hose for the brake booster if you mess yours up like I did.  I got the vacuum hose from rockauto (Gates part number 27230).

I did not replace the 2-3" of fuel lines between the hard lines because they looked alright.  But if you want to replace them, then you need to add some 5/16" fuel injection hose to your parts list.

Like I said before it's fairly obvious with the intake off what you need depending on what you want to do.

It is definitely way easier to use the OEM lines for the ICV to intake and valve cover to throttle body and extending them with the barbed fittings rather than using regular heater hose or vacuum hose because they have the correct bends.  Trust me I tried using regular hose and it didn't work very well.

Good luck!!!