Last edited by teknikALLEN; 10-01-2013 at 03:02 PM. Reason: Picture
It has a GM part # too. Used on some Cadillacs I believe.
It was crazy no one has posted this before.
Now thanks to you when the CRACK pipe gets broken, we can use a new part to re-make the hose...
That is the vacuum check valve that in attached to the hard plastic (CRACK) line, the line breaks and leaks vacuum. It powers the brake booster, and remember class Any Vacuum leak on the cabby is a bad thing and causes all kinds of mischief.
That check valve also contains the 2 vacuum off shoots that get man handled and broken also.
Having one when you break the line at 2:30 in the morning.... well that is a good thing.
I got my new valve in the mail, and I am going to install it, but I figured this would be a good time to ask about the following questions....
the blue arrow points to..... what IS that thing, and what good can it possibly do sitting there on its own? Does it vent vacuum or something? Is it a sensor of some sort?
The green arrow, I know what that is, but it was already in my image...so never mind that one.
The RED arrow, that's some sort of a right-angle adapter monstrosity, is it not? that line is a Frankenstein of several different diameters of vacuum line and that thing that looks like a check valve, but is what... just an adapter? If that's just an adapter of some sort I'd love to replace that whole line to the brake booster with just a single brand new vacuum line.
Red arrow: yep, a monster of an adapter. The factory piece was a hard, molded plastic pipe that was shrunk over the check valve at one end, and a different plastic nozzle on the other end, which pressed into a grommet on the booster.
Buy my Cabby!
actually the red arrow device comes on new vacuum assisted brake boosters
typically your hose goes into the brake booster with a straight valve
instead remans shove a 90*degree one way valve in there for you
and it explicitly says on the label "Do not remove"....
i have seen the blue arrow before
but i dont know what it is really
apparently it is an electronic valve that syphons vacuum...probally an idle or wot adjuster
Last edited by rabbitnothopper; 10-11-2013 at 07:50 PM.
I guess I should ask then... how much stock would I put on "do not remove"? If it's just a passthru elbow, I'm either going to remove it or use two lengths of hose to have that clean 90* turn. I am just very sketchy about the hose sections that are directly connected to other hose sections, and are starting to show signs of cracking.
I believe the blue arrow is the Up-shift indicator vacuum switch. It relays engine load to the up-shift control unit and is connected to vacuum line to/from distributor usually to the Throttle body. I normally see that closer to the distributer rather than the TB.
I have an 88... so while my instrument cluster has the shift indicator, I believe it doesn't actually have the hardware. I looked it up in my Bentley and it claimed to be something else but for the life of me I can't remember. Something to do with idle boost or something.
2012 Jetta GLI
2010 BMW 135i
2005 MINI Cooper S
2004 Volvo C70 LPT
1987 Cabriolet Bestseller