Hi I have a 1964 220 sec European model, I am looking for an aftermarket fuel pump replacement or a good used one if possible. If anyone has one for sale or could lead me to a one I really appreciate the help. Also, where is a good source to buy parts for this car on the internet?
Thanks
Mohamed

Is the pump totally shot, or maybe just frozen from gunk that has collected in it? I was able to get mine pumping again, after taking off the bottom plate, and cleaning out the goo that has crusted itself on various parts of the impeller.

If it is totally bad, then Phil here at fastlane/partsshop should be able to get it for you. (it won't be cheap)

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09 Jetta TDI
1985 300D

HI Larry
It's totally shot, I got the psi spec. from Bosch it is 12-16 psi, and I am going ot replace it soon.
Thanks
Mohemad

I know there is a rebuild kit for the ponton ones. Not sure about the finnies.

See http://www.mbzponton.org/valueadded/maintenance/fuelpmp.htm and http://www.mbzponton.org/valueadded/maintenance/fuelpump/fuelpump.htm

Len

This is an "SE" so we are likely talking about an electrical pump here.

Someone spoke about a VW pump which could be used as an alternative but I don't remember the details.

Karsten

Before changing the pump, check the filter screen at the bottom of the tank... the pump should have a flow rate of 1 litre in 15 secounds .. if not, the screen is suspect.......................

Sorry, never picked up on the SE part. I was definitely referring to an S edition.

Len

A later model fuel pump can be used. Mounting it is fun. I have a pump from a 500sel running my 6.3 at the moment.

The important thing for the pump is to deliver a large volume of fuel. The pressure isn't all that important.

And yes, you can't under-estimate the effect of a clogged tank on the fuel system. A clogged deliver line can clog the pump. It can also kill the pump by starving it for fuel.

-CTH

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Ok I found the answer, I have spoke to Bosch and was told the psi for this pump is 12-16 or 0.8 bar, all what this electric pump does is deliver the fuel to the mechanical fuel injector pump and this one has a high pressure delivery to distribute the fuel to the injectors. So any electrical pump with 12-16 psi will work or install a fuel regulator to the pump.

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The PSI is the easy part.. the important spec on these is the flow rate.. which must be at least 1 litre in 15 seconds before the injection pump.
A low volume, high presure pump will not meet this flow rate.
So, check that along with PSI.........

I have a 1965 220 seb and I could use some advice on how to clean the gas tank screen mentioned on this thread. The fuel pump wsa professionaly cleaned and the fuel injector pump canister/filter has been replaced. I have not yet had the opportunity to remove the pump and look inside to see if it is a mechanical failure due to inadequate fuel flow as previously advised.

What is the correct fuse for the fuel pump? An 8 amp fuse was in place from the previous owner but everytime the fuel pump came on the fuse blew within thirty seconds of operation.

Any help on this matter is greatly appreciated.

The best option is to drop the tank and get it cleaned at an engine rebuilders who have a hot tank.The filter is in that plastic bung in the center of the bottom of the tank.
I use an ultrasonic cleaner to clean the filer,which on your 220SE will be nylon with a fine nylon mesh.
The filter will still work even when really blocked but what does happen is the small pipe running into the tank gets blocked.
I ALWAYS check this by pushing a fine welding wire into them to check they are clear.
As for the electric pump,any 220SE pump will suffice but I just sold a couple of finnys with Pumps from 109's (3.5 liter) they work perfectly with no starving etc.As Charlie said in his post,the W126 pump will also work fine.It's not pressure you need just volume.The fuse will be blowing because the pump has seized.

Thanks for the info. The fuse was blowing before the pump siezed up permanently. I am in the process of having the tank cleaned and I have another question regarding the fuel system. Is there a specific size in-line fuel filter that should be used between the fuel tank and the pump? I had used one of the larger clear in-line fule filters and it seems the amount of fuel flow was inadequate.

Any and all advice is as always greatly appreciated.

don't do that. The pump doesn't have a lot of suction power and relies on gravity and the relative level of the pump to the fuel to keep it busy. The filter in the tank is sufficient to protect the pump, once you have the tank boiled out. Likewise, the fine filter in the engine compartment is sufficient to protect the fuel distributor. -CTH

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Yes,never use one of those inline filters in a merc EFI system,they are for Carburator engines and will not withstand any pressure on the engine side of the pump.I have found that the pumps can stripped ( undo the screws on the base ) and the brass impellor can be cleaned with brake clean .That is sufficient to unstick them.If the seal goes ,the fuel will leak out a special port on the pump.the seal is just a generic "o" ring that can bought from most engineering suppliers. The main filter is in a housing on the left hand engine mount support,it has a 13 mm bolt in the center.The same filter was used on ALL the mercedes MFI systems including the mighty 6.3 so getting one should be easy.