gtroth

What's this? What's it do? It's p/n 944.616.104.00, which PET calls a heating tube and Pelican call an oil heating tube. It's loose so I'm worried about vacuum (I can pull it right out by hand). It's attached to a "bushing" that looks like it used to be glued to the manifold but now comes right out. The other side of it Y's out to the oil filler and to the J-tube right ahead of the throttle. I want to glue the bushing back on, I think. Epoxy?

Thanks for your time.

SoCal Driver

The base for the plastic item is pressed into the manifold. You will need to enlarge the contact diameter of the base or shrink the hole it presses into. OR figure out a way to make a bracket coming off of the bolt in the upper right that holds the item into the manifold.

Find some one that can weld aluminum and spot weld the fitting into the manifold.

mark944turbo

Its magnesium! The 2 S's that I have both have that delted, I think the factory makes a cap for it but I am not sure of the part number. I also dont know what the other end attatches to, but its just emissions stuff.

gtroth

The bushing that fits into the manifold fits pretty tightly with only a few mils of slop, and it seems to have been glued in the past (I can see the old film of glue that failed - that's what I'm pointing to in the picture). If I had to guess I'd say the factory glued it. The plastic part still mounts nicely to that bushing.

The assembly is not going to fall out or anything. That thick vacuum hose loads it all pretty well into the manifold.

KuHL 951

JB Weld is your friend...don't mess with trying to weld the fitting in.

gtroth

Yup - glued the bushing down with a thin layer of JB Weld today. Never used it before - that stuff seems perfect for this. What is it, epoxy with filler? If so, any idea what it's filled with?

Still don't know what that part does, but at least it's mounted well now.

apierce918

ones liquid steel type resin and the other is a hardener

gtroth

Hey, you know, that loose fit must have been I significant vacuum leak. I wasn't expecting much, but the car seems to generally run better and pull stronger. Of course, it also seems to handle better so it could be all in my head.

Seriously, though, even the last little shimmy in my idle is gone. The idle vacuum measured a little over 15inHg immediately before sealing this up (maybe 20 inHg under load) . I'll measure it again this weekend and see if the difference is measureable.

wizkid - yeah I saw they call it steel - epoxy filled with steel/iron I suppose. It is magnetic.

joseph mitro

hmm, i had my S engine in and out twice and rebuilt the entire damn thing, and i never saw anything in the intake manifold that remotely resembled what you are pointing at. interesting.

gtroth

Just what I want to hear. 1988 engine, Joseph?

joseph mitro

no, 1987. maybe they added that a year later. i have no idea what it is.

gtroth

Sealing this loose fit didn't affect the vacuum reading one bit (still ~15inHg). But I am now absolutely sure the care is running better. Maybe measuring vacuum at the fuel pressure damper is not telling me the whole story?

You know how in your wife's newer car you can't tell if the car is running at idle? Believe it or not, mine's like that now most of the time. I keep thinking it's stalled.

Anyway, still a mystery as to what this part is...

aribop

The 'S' intake I have has that hole plugged.

Operator

ive got it. 88S here.
and you know, it doesnt feel like its loose whatsoever!

aribop

I just checked out an '89 944 that also has this item. I followed the hose coming off of it and it goes connected to the J-boot. The wiring triggers the valve which lets vaccum pass from the intake after the throttle body to the intake before the throttle body. More emissions crap is all that is.