Question about 2005 Volvo XC90
Replaced vent hose from valve cover to crankcase noise still there
The oil trap box is plugged up. You need to remove the intake manifold and replaced the oil trap box. It is the large black box mounted against the block just behind the a/c compressor. While it's apart check the nipple that goes bolts to the underside of the intake manifold. Use pipe cleaner to make sure it's clear. Also replace both seals for the oil trap box and of course the intake manifold gasket and it's a good idea to clean the trottle body while it's all apart. Use either BG air intake cleaner (available from and BG dealer or most Volvo dealers) or Berrymans B12 carbuerator cleaner. Spray it on a rag and wipe the inside of the throttle module to clean it. don't spray to much directly onto the throttle blade, it is possible it will damage the seals inside the unit.
Hope this helps.
Posted on Feb 28, 2009
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Posted on Jan 02, 2017
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