Do not use the in-tank pump... EVER
04-30-2011, 08:28 PM
#1
Supercharged
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Do not use the in-tank pump... EVER
So today I pulled the in-tank pump from my car. This was installed new, two years ago! This is what it looked like when I pulled it out today...
04-30-2011, 09:01 PM
#4
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It was added for hot climates and low vapor pressure fuel. AFAIK, people have removed them from all models of the 928 with no adverse affects.
The hose failure and the drive pin failure on the pump are likely due to Ethanol additives in modern fuel. Quite often these cars sit for a long time and the fuel will begin to separate.
The hose failure and the drive pin failure on the pump are likely due to Ethanol additives in modern fuel. Quite often these cars sit for a long time and the fuel will begin to separate.
04-30-2011, 09:22 PM
#7
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What king of fule are you pumpin' through that thing Andrew????
Local guys recycycling evil stuff thought the gas pumps now? (You sure Brian hasn' t been near yer car ?)
Hell hath no fury......
Local guys recycycling evil stuff thought the gas pumps now? (You sure Brian hasn' t been near yer car ?)
Hell hath no fury......
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04-30-2011, 09:56 PM
#10
Essentially correct. That rubber sitting in fuel can't be good. Especially if the fuel is over 10% ethanol you could have some softening of the rubber if it is natural rubber. If it were a flouro derivitave of some sort would be better.
If the pump flows the fuel past the windings and they are not covered, then the copper can corrode from the water in the 10% ethanol.
The 10% should not be catastrophic in two years. I believe that there has been ethanol in fuel for quite a while, and they did not fail as often when first installed.
It's a quality issue. But with older cars not designed for ANY alcohol in the fuels, there will be issues even with the newer parts.
The strainer assembly is a much better option for this area
If the pump flows the fuel past the windings and they are not covered, then the copper can corrode from the water in the 10% ethanol.
The 10% should not be catastrophic in two years. I believe that there has been ethanol in fuel for quite a while, and they did not fail as often when first installed.
It's a quality issue. But with older cars not designed for ANY alcohol in the fuels, there will be issues even with the newer parts.
The strainer assembly is a much better option for this area
It was added for hot climates and low vapor pressure fuel. AFAIK, people have removed them from all models of the 928 with no adverse affects.
The hose failure and the drive pin failure on the pump are likely due to Ethanol additives in modern fuel. Quite often these cars sit for a long time and the fuel will begin to separate.
The hose failure and the drive pin failure on the pump are likely due to Ethanol additives in modern fuel. Quite often these cars sit for a long time and the fuel will begin to separate.
04-30-2011, 09:58 PM
#11
04-30-2011, 10:06 PM
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Rubber in fuel tanks is not all that uncommon. The last few cars I have put larger pumps into have had rubber lines submersed in the tank and show no signs of cracking and what not.
That is a very disturbing photo though.
That is a very disturbing photo though.
04-30-2011, 10:51 PM
#14
I think its a matter of the manufacturer not updating the materials for these pumps.
04-30-2011, 10:52 PM
#15
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