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Crankcase vapor oil separator

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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sparklezap
Posts: 22
Joined: 25 April 2018
Year and Model: 2004 v70xc
Location: vermont

Crankcase vapor oil separator

Post by sparklezap »

Hi. How do I get the black cap off to check my regulator valve diaphram? Looks odd with those tabs all the way around it. 2008 XC90. Thanks

Capndirk
Posts: 30
Joined: 1 November 2018
Year and Model: 2009 XC90
Location: La Conner, Washington
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Post by Capndirk »

You have to break them to get it off. I bought the Dorman diaphragm kit from Rock Auto,
DORMAN 917147 {#31319642, 31319643} DIAPHRAGM
I used a small punch to break the tabs after trying all kinds of tricks to get the cap off without damaging it. Turns out my diaphragm was fine, but installed the replacement . No problems. Took the car for a 3,100 mile romp right after, and all is well.

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