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Need 5mm x 6mm bearing rollers- MFI fuel pump
Does anyone have a source for these?
I need some new ones for my Bosch 0580970001 MFI fuel pump (the electric one). Has anyone ripped apart a later CiS pump and measured the rollers in the roller cell? No one can supply here in NZ and it's getting frustrating!!
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'72 911 T/E Silver Targa |
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10-26-2016, 03:51 PM
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Any info appreciated.
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10-26-2016, 08:39 PM
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Do you have any pictures to show what you need?
Lorne M.
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10-31-2016, 07:15 PM
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Hi Lorne The rollers are on the first page of this excellent post.
MFI Open Heart Surgery II - The Fuel Pump My rollers went AWoL, not worn out.. I've done a lot of Pelican searching for MFI fuel pump parts and know this much so far! Here's some background research if any one is interested: -The Chinese replacement ones are reportedly not so good. -The Porsche replacement ones are now possibly ok, but $$ -The 'Fuelpumpking' ebay ones are the Chinese ones, but also possibly wrong physically, and likely for the carbed 911 variants. Two of the three inlet/outlets should be the same on the MFI pump, one will be smaller o/d. -The rebuilds are ok, but some leaked in the past. Lots of people have had success. - The MFI system has an inbuilt 1 Bar (15psi) fuel pressure regulator included in the fuel filter housing. Grady Clay has/had :-( some great, informative posts about how this works, and why it may not be such a great idea introducing CiS type pressures upstream of this. -Zimms (+probably others) provide a replacement 1 bar pump, probably the Walbro one, but you need to forgo originality and ditch the third fuel line back to the tank (not a real problem, but they still won't fit in the original '72 position in the rear). And then you need to relocate the pump on the front cross member, 'old style'. -Nor will CiS pumps with an aftermarket (eg PMO) fuel pressure regulator fit in the original position. From what I have seen, they all have an inlet on one end and outlet on the other. There is so little space in the rear factory position that barely the original pump fits. -Other options for parts hunters are anything original Bosch D-Jetronic. Different pressures and specs, but lots of similar internals from what I've seen. -Benz made some similar pumps for their MFI cars early '70's. Still hard to find for parts here. Alfa Montreal as well, but rarer that early 911 MFI! - Nissan 240Z in the states also used D-Jetronic. Possible cheaper parts if you can find them. -Rover SD1 used a similar roller cell Bosch pump I think. -All, from what I can see Bosch CiS pumps are roller cell, including the 044 Motorsport pump. Hence me asking if anyone is able to measure the internal bits. I'm basically asking for some parts suppliers to retain originality if at all possible. Cheers!
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10-31-2016, 11:33 PM
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.. Volvo and Saab D-Jetronic. Add them to the parts list.
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10-31-2016, 11:40 PM
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The two pumps that I have currently apart, each have a form of bronze bushings that are held in place with a plate that is staked into the case ends.
I will try to remember to post pics tomorrow. Lorne M.
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11-01-2016, 05:40 PM
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The 1 Bar Walbro pump, suitable for MFI is the GLS395. Pelicans please correct me if this is wrong.
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11-01-2016, 10:48 PM
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Edit: the D Jetronic pumps are obviously different specs to the ones we want .
What they share is the 'fabled' 0580 Bosch architecture. Easy to see in a pic of the pump. Any pump with this starting sequence is, in my opinion, silly money now. They are just fuel pumps.
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11-01-2016, 11:16 PM
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76 911S Targa
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You must have an industrial bearing supplier in Auckland. If you provide the sales clerk with the exact bearing required, he will pull it off the shelf and sell it to you, likely for less than $10.
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76 911S, 2.7, Bursch Thermal Reactor Replacements, Smog Pump Removed, Magnecors, Silicone Valve Cover Gaskets, 11 Blade Fan, Carrera Oil Cooler, Turbo Tie Rods. |
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11-02-2016, 06:36 AM
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here is a couple of pictures of the bearing from one of my Bosch fuel pumps.
Lorne M.   
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11-02-2016, 04:27 PM
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Thanks Targalid & Lorne, great answers.
Being resourceful, I have contacted all the bearing suppliers here in NZ a long time ago. I've spent hours on the web looking for these. There is indeed a supplier in China, but I only want a dozen. We have a $50K Acutom precision grinder at my work, and I've attempted to regrind the only size available, which is 2mm too long. Didn't work. I don't engage the Pelican mind trust without due diligence, but I ask that if you have an old Bosch roller cell pump in your hands then please measure the rollers. Cheers!
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11-09-2016, 07:54 PM
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