Unknown part with disconnected hose

s3bi · Post by **s3bi** » 21 Nov 2019, 23:22

Hi,

I've found a hose which is not connected that's coming from this part:

Unfortunately the part number is worn and not readable. I also couldn't find a detailed overview of the parts in the engine bay, where it would be mentioned.
The hose ends at the right side the air filter box.

Can someone tell me what this part is and where the hose is supposed to go normally?

It's a 1996 Volvo 850, 2.5L 10V 106kW.

Thanks in advance.

Post by **abscate** » 22 Nov 2019, 03:34

It looks like one of the air box hoses that control the hot air flapper.

Look for two fittings on the rear of the air filter box and see if one is open without a hose

There are also cruise control hoses in that area, those go under the air box , I believe

Post by **volvolugnut** » 22 Nov 2019, 10:38

It looks like the hose attached to the device in the second photo is near to failure. The hose diameter change at the end of the hose nipple is showing failure cracks. It would be good to replace now before it fails.

Soap Box Rant Alert!

Everyone attempting to service a modern vehicle should periodically check vacuum hoses for signs of failure - swelling, cracking or hardening. Replacement is cheap and often does not require tools or knowledge. Failures may leave you stalled in the road in the dark and wet. Replacing them at your convenience is better and you will learn some about the hose routing. Just be sure to replace with same size and remove only one hose at a time. You might also find some fluid leaks.
Soap Box Rant End.

volvolugnut

Stu70 · Post by **Stu70** » 22 Nov 2019, 10:49

Hey, nice engine ! Without that pesky turbo pipe in the road and the collectors edition “DOHC” cover.

Stu70 · Post by **Stu70** » 22 Nov 2019, 10:52

+1 for hose coming round that side of box being cruise vacuum motor line...
Or
From the bottom nipple of air box flap control just been tucked out of the way...

s3bi · Post by **s3bi** » 18 Jan 2020, 22:34

Thanks, I'm going to order a few new parts from Skandix soon (also lost a wheel cap and need a mounting bracket for the gas tank), so I'll get some vacuum hoses as well.

I've encountered another problem, there's a squeaky noise coming from the front right at lower speeds, even when riding over small bumps. I couldn't see anything suspicious in the wheel suspension or the damper when I removed the wheel. I gave everything a good shake but also nothing was loose. A friendly car mechanic thought it could be a part of the wheel fairing, he put on some mounting adhesive but this didn't fix it. Are there any known common causes for this? I could also upload a audio file if it helps.

s3bi · Post by **s3bi** » 27 Jul 2020, 14:17

I was able to find out what it is now. It's neither for the hot air flapper nor the cruise control, but for a cold running regulator which did not come with the car but was added afterwards to achieve a better emissions class (Euro2) so the car costs less in taxes.
The vacuum hose that connects to nothing actually connects to nothing, it once had a small air filter piece on the other end, where it pulled in the air that this valve lets through while the motor is cold. There are also variants that use the air filter of the car but there's no hole drilled in for this one.

bronco · Post by **bronco** » 27 Jul 2020, 16:26

volvolugnut wrote: 22 Nov 2019, 10:38 It looks like the hose attached to the device in the second photo is near to failure. The hose diameter change at the end of the hose nipple is showing failure cracks. It would be good to replace now before it fails.

Soap Box Rant Alert!

Everyone attempting to service a modern vehicle should periodically check vacuum hoses for signs of failure - swelling, cracking or hardening. Replacement is cheap and often does not require tools or knowledge. Failures may leave you stalled in the road in the dark and wet. Replacing them at your convenience is better and you will learn some about the hose routing. Just be sure to replace with same size and remove only one hose at a time. You might also find some fluid leaks.
Soap Box Rant End.

volvolugnut

Don't sell your soapboxes short!

I know someone who buys old wooden ivory soap boxes and resells them for a nice profit