When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I've decided to try and eliminate vacuum leaks as a source of my troubles, but I can't seem to find any info about these two hoses on top of the throttle body on my B230F engine. They both disappear somewhere under the battery maybe? I can't seem to see where they go. The Bentley manual is absolutely no help on this, and I can't find replacements if I don't know what they are called. The vacuum hose diagram under the hood calls them "Purge" and "Vacuum Control (Black)" (they are both black, BTW), but I can't find either of them listed at IPD or FCP Euro, or CarID, or any of the usual places that carry Volvo parts. The larger hose looks like a generic 8mm I.D. air hose, no big deal there. The other one looks to be special.
the bigger one typically goes to a one-way valve (black/white disk thats inline on the hose),and from there to the power brake booster. it might T off and go through the firewall to the ventilation controls.
the bigger one typically goes to a one-way valve (black/white disk thats inline on the hose),and from there to the power brake booster. it might T off and go through the firewall to the ventilation controls.
No, they both go to the charcoal canister in the front of and below the battery. (740/940NA)
the bigger one typically goes to a one-way valve (black/white disk thats inline on the hose),and from there to the power brake booster. it might T off and go through the firewall to the ventilation controls.
The brake booster hose comes off the back side of the intake manifold and loops under then over the brake booster. I think you're thinking of the "Mystery hose" in my pic:
It does indeed have a one-way check valve, and it disappears behind the firewall on the passenger side.
Originally Posted by lev
No, they both go to the charcoal canister in the front of and below the battery. (740/940NA)
OK, that's where I thought they might go, but I didn't take the time to remove the battery to look under the battery shelf.
So, where do I find replacements if they turn out to be leaky? I've looked at all the usual places, but nobody goes by the names that the sticker in the engine compartment gives them.
OK, so if I replace all the hoses that may be leaky, I'll need
- "Accordian" duct that comes off the MAF sensor
- Flame Trap assembly (might as well, and they don't sell the hose separately)
- Brake Booster hose and new check valve (just to be sure)
- Idle Air Control hose (which may be OK, it looks brand new)
- "Mystery" hose with new one-way valve, and rubber "boot" for the hard line
- Purge hose
- Vacuum control hose
I need the actual name of the "Mystery" hose, and the names of the Purge and Vacuum Control Hose, because I can't find them anywhere.
I already got a FPR hose. The guy at O'Reilly didn't charge me cause it was the last 12" of that size hose in the scrap hose box. ...And he knows I'll be back...
just get some vacuum host of the same inner diameters. that hard plastic thin stuff is sold by the foot, and you can get the soft bendable joiners too, that fit on the nipples. if you bring a few pieces to your friendly LOCAL auto parts store that carries euro (vw/volvo/bmw/audi/etc) you'll be golden. cut to fit, assemble.
your mystery hose looks associated with the flametrap/crankcase breather, it looks like its coming off the top of the oil seperator box thats under the intake manifold... IPDusa sells all the bits for that, FCPEuro probably does, too.
The "mystery hose" runs the flaps for the HVAC ducts within the cabin of the car. I runs from the manifold through the 1-way check valve to a vacuum reservoir in the center console. From the vacuum reservoir there is a line that runs to the HVAC control buttons (defrost, heat, etc). The HVAC control buttons have lines going to the flapper slave servos.
Like Pierce said, those hard lines and rubber connectors can be found as universal parts. Just measure the diameter of the hard plastic tube. I had a to replace a lot of these items on my Mercedes and they didn't even stock it. I found it online (my guess is that is 8mm plastic tubing). Just make sure it is intended for automotive use - generally heat and oil resistant.
The "mystery hose" runs the flaps for the HVAC ducts within the cabin of the car. I runs from the manifold through the 1-way check valve to a vacuum reservoir in the center console. From the vacuum reservoir there is a line that runs to the HVAC control buttons (defrost, heat, etc). The HVAC control buttons have lines going to the flapper slave servos.
Like Pierce said, those hard lines and rubber connectors can be found as universal parts. Just measure the diameter of the hard plastic tube. I had a to replace a lot of these items on my Mercedes and they didn't even stock it. I found it online (my guess is that is 8mm plastic tubing). Just make sure it is intended for automotive use - generally heat and oil resistant.
OK, good to know where the "mystery hose" goes.
VolvoPartsWebStore has all the hoses and connector bits for less than a Benjamin, other sites have all but the connectors. Regarding the Evap Canister; I can't find these anywhere, and apparently they aren't even made anymore. Is this a "lifetime part"? Or should it be replaced? Or can I simply remove all that noise and plug everything because the car is old enough to be exempt from emissions? I'd rather not, but if it's useless otherwise...
you could always find a similiary shaped and sized one from a different car model and adapt it, its just a cannister of activated charcoal with a pair of vacuum hose connections...
What are these hoses? And where do they go?
