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PTC Elbow Hose missing?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
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XC70Rider
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PTC Elbow Hose missing?

Post by XC70Rider » Mon Oct 22, 2018 7:05 am

I purchased a 2007 XC70 with a 2.5LT lasy May. The dealership claimed the PCV was replaced and cleaned. No smoke and the glove test has strong vacuum on the oil cap.

When I removed the air intake hose for cleaning I noticed the PTC only has 1 hose connected to it. It's the large hose coming straight from the PCV oil trapper box. Diagrams I've seen show another small elbow hose is supposed to be connected to the smaller port on the PTC. That small elbow hose appears to come from the large PCV setup.

Image

I cannot find that small hose within the long PCV setup hose that includes the coolant pipe. Here is a photo of the large hose connect to the PTC. I replaced that zip tie with a SS hose clamp. As you can see the small port on top is naked. The port on the right side is for the purge solenoid hose I temporarily removed.

Image

Do I need to buy another PCV setup hose that includes that small elbow hose?

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prwood
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Re: PTC Elbow Hose missing?

Post by prwood » Tue Oct 23, 2018 8:50 am

On my '01 V70 2.4T, there is an empty port on the PTC nipple opposite the electrical connector. It's never had anything connected to it and I haven't experienced any issues.
Cars I've owned:
- 2015 to current: 2001 Volvo V70 2.4T
- 2007 to 2015: 2002 Subaru Legacy L Wagon
- 2003 to 2016: 2001 Toyota Corolla LE
- 1999 to 2003: 1994 Toyota Camry LE

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Re: PTC Elbow Hose missing?

Post by xHeart » Tue Oct 23, 2018 11:28 am

The smaller of the two hoses at the nipple comes from the Turbo Boost Solenoid (Pierburg). It is hung at the airbox.
Item #7 in this diagram:
Image
Image
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Re: PTC Elbow Hose missing?

Post by XC70Rider » Wed Oct 24, 2018 10:27 am

prwood wrote:
Tue Oct 23, 2018 8:50 am
On my '01 V70 2.4T, there is an empty port on the PTC nipple opposite the electrical connector. It's never had anything connected to it and I haven't experienced any issues.
The empty port on my PTC is short and has a flat edge on 1 side so it doesn't appear to be for a hose connection. I presume it must be for ventilation.

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Re: PTC Elbow Hose missing?

Post by xHeart » Wed Oct 24, 2018 10:34 am

Explore this https://www.ipdusa.com/products/9736/12 ... nder-turbo

Image

IPD's idea of color coding the vacuum lines
Image
Last edited by xHeart on Wed Oct 24, 2018 10:36 am, edited 1 time in total.
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Re: PTC Elbow Hose missing?

Post by XC70Rider » Wed Oct 24, 2018 10:35 am

xHeart wrote:
Tue Oct 23, 2018 11:28 am
The smaller of the two hoses at the nipple comes from the Turbo Boost Solenoid (Pierburg). It is hung at the airbox.
Item #7 in this diagram:
Image
Image
The turbo boost solenoid is connected to the port in the upper right side of my photo. What I'm referring to is the PTC port hose connections. It has a large port with a hose going straight to the oil trapper. It also has a very small port on top that you can view if you only zoom in on my photo. That never had a hose connected. The tiny port has a flat side so I presume it might be for ventilation?

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Re: PTC Elbow Hose missing?

Post by XC70Rider » Wed Oct 24, 2018 1:32 pm

After drawing a diagram I checked all the hoses to verify where they're connected to.

Image

Green: EVAP purge valve

Pink: PCV oil trapper

Red: Turbo boost solenoid

Purple: PTC electrical connection

Blue: ?

There is nothing connected to the PTC nipple pointing to the blue arrow. Am I missing a hose or is this tiny port for ventilation?

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xHeart

Re: PTC Elbow Hose missing?

Post by xHeart » Thu Oct 25, 2018 8:06 am

Blue is not a port. It houses sensors. The PTC can be pulled off from the pipe for cleaning, but be careful. Wetness from moisture is normal.
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Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +144mi/231km | 2001 V70XC 1st Owner +196mi/ +315km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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Re: PTC Elbow Hose missing?

Post by XC70Rider » Thu Oct 25, 2018 8:42 am

The diagram in my first post shows an elbow hose connected to it but that must be for earlier volvos. There is a thru hole in that flat sided housing section so I can see inside the air intake pipe.

That open hole had me judging that is why she is running slightly lean. No codes but she starts off at 5% lean then makes it down to 1% after a 15min warmup. I changed all the vacuum hoses. The break system holds most vacuum overnight. The vacuum pump still comes on for a few seconds only after several hours of sitting so it's not abnormal.

The PTC port for the PCV hose had no crud when I removed the air intake pipe so I just gave it another easy cleaning.

Thank you Xheart.
xHeart wrote:
Thu Oct 25, 2018 8:06 am
Blue is not a port. It houses sensors. The PTC can be pulled off from the pipe for cleaning, but be careful. Wetness from moisture is normal.

XC70Rider
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Re: PTC Elbow Hose missing?

Post by XC70Rider » Fri Oct 26, 2018 3:38 pm

I taped off the tiny PTC opening on it's housing but she still ran lean today. I'm using SW apps to detect it. I'll try to get my VIDA Dice working asap. Getting Virtualization activated on my laptop with WIN10 Pro has been a struggle.

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