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PVC valve system on Volvo 940?

Updated: 12/11/2022
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15y ago

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Volvo 940s do not have PVC valves. They do however have positive crankcase ventilation. Non torbo models have a flame trap that can clog, cause excessive crankcase pressure and blow out the oil seals. The flame trap should be checked every oil change. Change to the new plastic one if you still have the old brass finned one. It clogs faster. It is smaller than a Golf ball. It mounts atop a 1/2 inch hose comming up from the oil box on the engine under the intake manifold between #3 & #4 cylinders. It has a small hose out the side and a "Ball Cap" hose on top.

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Q: PVC valve system on Volvo 940?
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