Fuel Pump on Volvo 5.7GI-B

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kebbie

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We have an 2002 Cobalt 226 with a 5.7 volvo penta. Over the last three years we have had to replace the fuel pump in it.
The issue we have with it is: When it gets to operating temperature, the fuel pump starts to act up bu whinning and making noise and the engine rpms drop down to almost nothing. Then it just quits running. If we put a bag of ice on the pump to cool it off the it starts back up. The local dealer tells us that the gas is evaporating and causing a vapor lock in it which makes it act up. Has anyone had such issues and if so how did you fix them?
 
Don S

Don S

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Re: Fuel Pump on Volvo 5.7GI-B

Sounds more like you have an air leak in the fuel system between the gas tank and the engine. Air is what causes pumps to get noisy.
That, or your tank has so much crud and water in it that it over powers the filter and plugs up the pump.
Have you ever emptied the contents of an old filter to see what might be in it? Might want to give it a try. Don't reuse the old filter, always replace with a new one.

Volvo also has several versions of the 5.7 in your year range, and year of your boat doesn't mean it's the year of your engine.
Do you have the full model number and/or the Volvo serial number of the engine?
 
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kebbie

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Re: Fuel Pump on Volvo 5.7GI-B

What puzzles me is when the pump starts to act up and make noise and cut out, we can pile ice on it and cool it off and it starts right up.

engine serial # 4012064086
Type 5.7 GI-B
product number 3869136
 
Don S

Don S

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Re: Fuel Pump on Volvo 5.7GI-B

Yes, pumps overheat when they have air in them. The gas is what cools them. Have you checked the filters?????
 
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kebbie

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Re: Fuel Pump on Volvo 5.7GI-B

you said FILTERS!! is there more then one. All i know of and see is the filter that is on the fuel pump. i have not checked that one yet.
 
Don S

Don S

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Re: Fuel Pump on Volvo 5.7GI-B

Many times an additional (Larger) water separating fuel filter kit is instaled before the engine mounted filter. Due to it's small size, it doesn't take a lot of water and debris to overload it and allow it into the pump.
 
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