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PCV Blues

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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PCV Blues

Post by Khorn09 » Thu May 16, 2019 7:34 pm

Hey guys, as you've probably seen i've taken on an xc90 project. It's an 03 with the 2.5t and aw55. The truck failed the glove test initially so I changed the oil trap, checked all my hoses to make sure they were clear. Checked the ptc valve but it wasn't clogged at all so i put it back on because it was clear, cleared the block oil passages, cleaned the banjo bolt and fitting where it connects to the IM (it was clogged, but i cleaned it good and check to make sure it worked by blowing in the passages) and still it fails the glove test. At idle it barely inflates the glove, not fully by any means, but you can see there is some tiny amount of pressure there. When i step on it and bring the rpms up, the glove stands up but doesn't blow off or over inflate(i'm testing at the oil cap). I'm at a loss here, where should i start looking?

- I vacuumed the elbow at the ptc fitting and the glove deflates when the engine is off. so I know that should be working.
-and I vacuumed the lower oil trap passage and pulled up oil. So i know for sure that's clear.
-I sprayed all around the vacuum lines and got no change in idle.
-I did have to change the headgasket 3 weeks ago.

the truck runs well, and it doesn't use oil and i haven't spotted any leaks so far.

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Re: PCV Blues

Post by RickHaleParker » Fri May 17, 2019 2:56 am

Did you check the Crankcase Vent Hose for leaks? $390 part.

ÜRO makes a rebuild kit for the Crankcase Vent Hose, which can be found on eBay for as low as $50.00

Yea I know ÜRO does not have the best reputation but $50.00 vs $390.

As far as I can see ÜRO the only ones that make a rebuild kit.


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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Re: PCV Blues

Post by tardcart » Fri May 17, 2019 4:27 am

if you are sure the PTC hole is open, then its the hose. either clogged breather or broken vacuum.

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