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Valve Cover Oil Deflector - squealing noise

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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Joined: Thu Nov 02, 2017 8:35 am
Year and Model: 2010 XC90 3.2
Location: Columbus Ohio

Valve Cover Oil Deflector - squealing noise

Post by [email protected] »

Hello Volvo brains! My XC90 3.2 is engine is squealing due to failure of the Valve Cover Oil Deflector. I think this is a pretty common issue, but can find much on the subject.

My question is, should I replace the entire deflector assembly with the gasket? Or just the gasket? I understand Volvo recommend replacing the deflector every 100K miles and there was an extended warranty on this issue at some point.

Thanks for your input.

Resources:
Similiar issue here:
viewtopic.php?t=63820

Whole part:
https://www.amazon.com/gp/product/B00NT ... b76fd93d80

Just gasket:
https://www.amazon.com/gp/product/B00L2 ... D7Q7&psc=1
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ggleavitt
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Re: Valve Cover Oil Deflector - squealing noise

Post by ggleavitt »

Other links- http://forums.swedespeed.com/showthread ... ost2878257 and http://forums.swedespeed.com/showthread ... -Box-Noise and

Not seeing the diaphragm sold separately, likely only option is to replace the oil trap/breather box (PN 31319642) and gasket (PN 30731243). I'll update this post if I can find the diaphragm separately.
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Re: Valve Cover Oil Deflector - squealing noise

Post by Masscomguru »

It's actually the diaphragm in the PCV (round valve on top). You need to replace the whole box. It is also referred to as the AirBox by some dealers.
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Re: Valve Cover Oil Deflector - squealing noise

Post by jimmy57 »

There is an ebay seller selling the diaphragm only.

item 172267660060
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ggleavitt
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Re: Valve Cover Oil Deflector - squealing noise

Post by ggleavitt »

^^^ Excellent, thanks for noting! ^^^
Last edited by ggleavitt on Fri Nov 03, 2017 3:15 pm, edited 1 time in total.
2005 2.5T AWD-201k
2008 V8 AWD Sport-132k
[email protected]
Posts: 2
Joined: Thu Nov 02, 2017 8:35 am
Year and Model: 2010 XC90 3.2
Location: Columbus Ohio

Re: Valve Cover Oil Deflector - squealing noise

Post by [email protected] »

Thanks everyone. I appreciate the help.

It's going to take a few days to get the parts. Should I completely avoid driving it until it's fixed?
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