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Old 22-04-2016, 12:36   #16
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Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
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Re: Low Hour Volvo Intermittently splutters And Builds Oil Pressure

Originally Posted by wedivebc View Post
The pressure in the crankcase is cause by a clogged screen in the breather and that in turn is causing pressure behind the pump diaphragm to prevent it from pumping fuel. I expect you have another crank vent other than the one on the valve cover.
If understand you the one with the spring on the valve cover is just a safety pop off. That makes sense.

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