1997 Volvo 850 GLT Turbo - very small hose above lower radiator hose in engine bay is broken.

moses3 · Post by **moses3** » 28 May 2023, 16:21

What is this hose for? Does anyone know a part number?

Post by **abscate** » 28 May 2023, 18:19

It’s a vacuum hose for the heated air motor on the air cleaner

454cid · Post by **454cid** » 28 May 2023, 18:57

abscate wrote: ↑28 May 2023, 18:19 It’s a vacuum hose for the heated air motor on the air cleaner

I thought turbos didn't get that? I switched to a turbo lower box, to get rid of mine. Mine is a 96, Though.

Post by **scot850** » 28 May 2023, 19:45

Turbos don't have them. There is a small hose that runs to the PTC nipple area on some turbos and to the top of the snorkel on the older engines if I recall correctly.

Neil.

moses3 · Post by **moses3** » 28 May 2023, 23:47

Mine has it, and it has a turbo. Maybe the turbo was added later, because I don't have a turbo gauge on the dash or an air filter box marked turbo.

Post by **abscate** » 29 May 2023, 04:14

Other vacuum operated stuff nearby…

Hot air motor noted above
supplemental air system solenoid, mounted high behind radiator
Cruise control?
EGR system, unlikely in a 1997

454cid · Post by **454cid** » 29 May 2023, 07:13

moses3 wrote: ↑28 May 2023, 23:47 Mine has it, and it has a turbo. Maybe the turbo was added later, because I don't have a turbo gauge on the dash or an air filter box marked turbo.

The GLT is a low pressure turbo.... no boost gauge or "Turbo" script on the airbox. My 99 S70 GLT doesn't have those things either.

Post by **jreed** » 29 May 2023, 07:33

I think my '97 855 GLT also had a hard white hose like this, with a crumbly rubber elbow, and it was part of the SAS system, connected to the solenoid valve on top of the radiator as abscate mentions above. If you're keeping it, I would recommend using a piece of silicone hose to replace the rubber elbow because the rubber elbows don't seem to have a long lifetime -- maybe 2-5 years at best and possibly less depending on which elbow location. The silicone hose is flexible enough to make a bend similar to what's molded into the elbow.

moses3 · Post by **moses3** » 30 May 2023, 02:36

jreed wrote: ↑29 May 2023, 07:33 I think my '97 855 GLT also had a hard white hose like this, with a crumbly rubber elbow, and it was part of the SAS system, connected to the solenoid valve on top of the radiator as abscate mentions above. If you're keeping it, I would recommend using a piece of silicone hose to replace the rubber elbow because the rubber elbows don't seem to have a long lifetime -- maybe 2-5 years at best and possibly less depending on which elbow location. The silicone hose is flexible enough to make a bend similar to what's molded into the elbow.

How can I use a silicone hose to replace the rubber connector? One side of the rubber connector is wide, where the other side is narrow?

Post by **jreed** » 30 May 2023, 05:40

I had that concern too -- flexible thick wall silicone tubing worked. You can get a tight seal on the narrow end and still be able to stretch the tube over the larger fitting on the other side.