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Rebuilding Bosch fuel pump?
Has anyone rebuilt a Bosch fuel pump? I have a 76 930 with fuel leak. Upon further inspection I loosened a few screws on the cap of the pump and found a cracked o-ring. Can this be replaced and the pump reused? Should it be pressure tested or sent out to be tested? To whom or where? The pump worked fine but just dripped a bit of fuel. Tempted to replace the o-ring and test it out but would hate to have a failure (or fire) later on because of half-assed fix. Normally I'd just replace but I'm having a tough time finding a direct replacement. Thanks, Jeff
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11-17-2010, 02:16 PM
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Max Sluiter
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What is the part number? It is not an "001" MFI electric fuel pump, right?
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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11-17-2010, 05:09 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,508
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The front fuel pump is a 1975 CIS pump that was used on the 75 cars in the left rear. It has the electrical connection on the side of the pump. A replacement shouldnt be difficult to get new. The rear pump is turbo application only.
Bruce |
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11-18-2010, 04:06 AM
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,554
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I dont think these are rebuildable... But even if they were, why risk it?? If the pump goes bad while in boost, you might very well have a lean condition...causing major engine damage.... These pumps are very easy to find....
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-3584RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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11-18-2010, 05:34 AM
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Registered
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It's a CIS pump made by Bosch # 0 580 254 990. I can't find the specs (gph or psi) on this pump either. Maybe it's the same as the 75 pump Bruce is talking about. The electrical hook-up is on the side of the pump. Anyone have any info. Thanks, Jeff
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11-18-2010, 05:51 AM
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,554
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-3584RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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11-18-2010, 06:49 AM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,508
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Ive owned a 76 930 for 18 years. When the front pump went I used an SC pump which is the one the 77 on uses. The 76 Bosch number is Fuel pump,0580254990 is actually turbo specific. Sorry for the misinformation
Bruce |
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11-18-2010, 09:39 AM
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Registered
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Yes, checked the host. It is listed at $880 and last I checked NLA. Someone has to have used an alternate pump. Suggestions close to the same specs as 0 580 254 990??? Jeff
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11-18-2010, 03:15 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,508
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The pet says the SC pump which also includes the 77 S pump is used on the Turbo.
Bruce cis fuel pump, fits 911 77-79; 924 77-80; 928 78-79; 930 77-79 front; aka bosch 0580254984, 0580254967 |
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11-18-2010, 04:42 PM
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Registered
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 4,184
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The $200 Bosch motorsport 044 pump in my daily driver is still working fine (and supporting 350+ RWHP as the sole fuel pump) two years after you first asked this question Which fuel pump????
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'77 S with '78 930 power and a few other things. |
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11-20-2010, 11:49 AM
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Registered
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Spuggy- Thanks for the update. I wonder if I replace that back pump with an 044 if I would have to put a fuel regulator in-line. Goes to show 2 yrs. and have yet to replace. Zero miles in 2 yrs. What a shame!!! Definitely need an easy fix. Thanks, Jeff
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11-20-2010, 11:56 AM
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Registered
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 4,184
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Quote:
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'77 S with '78 930 power and a few other things. |
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11-20-2010, 04:10 PM
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1971 Porsche 911S
