Fuel pump alternative on a 72 450SL

[meltedpanda]

getting ready to do some longer trips in ol Pearl and I want to have a spare fuel pump. Mine is original , and is working but it has been getting noiser. what are my after market alternatives ( if any) so I dont have to take out a loan.

I think the Bosch number is 0.580.464.005

[Graham]

Originally Posted by meltedpanda

getting ready to do some longer trips in ol Pearl and I want to have a spare fuel pump. Mine is original , and is working but it has been getting noiser. what are my after market alternatives ( if any) so I dont have to take out a loan.

I think the Bosch number is 0.580.464.005

Ron,
Bosch now have a replacement pump and they told me number was 0 580 454 999. I have not yet seen this for sale here.

This is the link Bosch sent me:
http://www.automotive-tradition.de/en/teile/media/Produkt_Profil_EKP_0580464999_en.pdf

and this is from their German site:

http://www.automotive-tradition.com/de/teile/media/Produkt_Profil_EKP_0580464999_de.pdf

These links should both be for the 0 580 464 999 pump, but they bring up different documents with different order numbers!

Confused yet? All I know if that there should be a new D-Jet pump available.

I was able to buy a Bosch pump a year or so ago. I checked with Bosch Germany and they knew nothing about it. But they checked with Bosch USA and they said that it was a pump that they had sourced. I believe it is used on Nissan 280Zs and some other cars. I have it new in box still.
(more here http://www.benzworld.org/forums/3911049-post32.html )

Some have used cheap aftermarket pumps, but most of those lack the internal pressure relief that protects from having the rubber hose connectors blow off in a case when FPR or return line is blocked. (see drawing in this message: http://www.benzworld.org/forums/4693055-post5.html )

By the way, I have heard that many D-jet pumps make some noise - Filling the tank sometimes quietens mine down. I am still running on the original.

Lets know if you find anything.

[meltedpanda]

thanks for the info, well the search begins....

[Graham]

Originally Posted by meltedpanda

thanks for the info, well the search begins....

I did a search and the Nissan pump comes up at Advance:

http://www.advanceautoparts.com/1/1/560003-electrical-fuel-pump-by-bosch-part-69612.html

That is the pump I bought, but have not tried. I suspect it is same as MB pump, but it would be interesting to ask Bosch for the specs (Flow/pressure/etc)


The Bosch USA site has a parts finder and says that part 69610 is the correct number for the Mercedes while 69612 is for the Nissan. I have asked Bosch Canada what the difference is, but no reply yet.

[meltedpanda]

thanks , let me know what you find out, in the meantime I will probably order one of these as a spare.

[meltedpanda]

still a lot of cash

[meltedpanda]

so I wonder , if we need about 28psi at the pump , why won't any pump capable of delivering that pressure due??

[rowdie]

I think it has something to do with the internal pressure relief valve. There are 2 used ones on Ebay but almost the same price. $299.00 and $225.00.

[Graham]

Originally Posted by meltedpanda

so I wonder , if we need about 28psi at the pump , why won't any pump capable of delivering that pressure due??

You need a pump that will deliver 1 litre in 30sec when voltage is at least 11.5V and fuel pressure is 2 - 2.1bar (29 psig)

There are many pumps that might do that, but the ones for CIS engines can put out a lot more pressure - maybe 90 psig or more when dead headed.

As pointed out earlier, the D-jet pump has an internal relief valve that limits output pressure so that rubber hose connections (that CIS engines don't have) won't blow off (and perhaps cause a fire) if for some reason pump is dead headed.

You could probably buy a cheap Airtex or similar pump and keep it just as a spare to get you home. They are all small in diameter and need a rubber mounting sleeve.

Or you could look for a used MB or Nissan pump on eBay and again just carry it as a spare. Some other cars also use a similar pump - Citroen, Saab, ?? but we would have to double check specs.

Or you could pay ~$300 and get a new pump. (Mine cost me $500!). That is actually quite a good price for a brand name fuel pump.

The other spare that I don't have (but maybe should), is a fuel pump relay. It's hard to get at. I think if I ever get it out again, I will just install a pair of wires and a fuse holder so it can be easily jumpered if it fails.

[meltedpanda]

Originally Posted by Graham

The other spare that I don't have (but maybe should), is a fuel pump relay. It's hard to get at. I think if I ever get it out again, I will just install a pair of wires and a fuse holder so it can be easily jumpered if it fails.

where is that on ours again, getting old
and your right about the pump , I just need to get the right one

[Graham]

Originally Posted by meltedpanda

where is that on ours again, getting old
and your right about the pump , I just need to get the right one

The relay is, I THINK, the top one just in front of fuses. On mine it has some other stuff on top of it.

PS: I found I had taken some pictures when I removed mine.

[meltedpanda]

do you have the part number on the fuel pump relay , I cant find it in EPC

[rowdie]

Same as all the ice cube relays. 001 542 02 19

[meltedpanda]

got an extra lying about

[rowdie]

Yes. And if you had come to the GTG I would have given you one.