W113 Fuelpump specifications

[frav]

Hi,,

My fuel pump has stopped working in my W113 230SL -64 & I need to replace it. The original one is very rusty, but maybe restorable. The electrical engine started one time when I knocked on it with a hammer. But the second time it wouldn’t start anymore.

For the moment I haven’t got the time to restore it. So I need some other fuel pump for replacement. I have found some universal fuel pumps that looks similar to the original one.

My question is what specifications the original fuel pump has. Flow & pressure?

I have found these universal fuel pumps

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Flow: 100 l/h
pressure: 0.15 bar

Flow: 110 l/h
pressure: 0.20 bar

Flow: 130 l/h
pressure: 0.35 bar

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Flow: 130 l/h
pressure: 0.25 bar

Flow: 130 l/h
pressure: 0,27–0,34  bar

Flow: 130 l/h
pressure: 0,40–0,48 bar

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Can someone of these fit as a temporary pump?




Br
 Fredrik
 Sweden

[Naj ✝︎]

Hello, Fredrick,

Flow rate is around 4 litres/min so 240 L/Hr.
Pressure is between 0.8 to 1.1 bar (if my memory serves me right  )

naj

[Jonny B]

Good memory Naj,

The MB "Technical Data Passenger Cars" has the following for the fuel pump

Feed pressure (after fuel fine filter) - 0.8 -1.1 kg/cm2 (perhaps they meant the fuel line filter?)
Feed final pressure (after overflow valve of injection pump) at least 1.3 kg/cm2
Feed capacity at least 3 liters/min

[frav]

Hi Naj,,

I hope you are well.

-------------------------------

Then non of the suggested universal fuel pumps I have found are useful.

Do you have a suggestion where to find a fuel pump (preferably in in europe) for a good price that comply with the original specifications?

[geezer]

Fraj,

I believe DrBenz has a low mileage used pump.  It was offered to me when I was looking for a pump.  I also found a pump that I believe was in England for a great price.  Unfortunately, I have misplaced the e-mail on that one.  Perhaps he'll chime in.  I did find a reasonably priced fuel pump (is that an oxymoron) here in the states.

http://www.europartsdirect.com/epc-items.asp

[Shvegel]

If you are not looking for correctness I used a fuel pump from an older Saab circa 1985-1993.  It was a little noisier but it worked well. The Saab pumps are installed in the tank with a big rubber boot and 2 steel clamps around the pump and the tank lip.  I cut most of the boot away, loosened the clamp around the pump and slipped it over one of the mounting legs for the original pump. It worked well for years and I didn't have to drill any holes.

Actually most of the Bosch fuel injection fuel pumps should work except for maybe Audi which usually uses a tank mounted pump with a big screen built into one end. Volvo 240s (1980ish)are under the car as well.  Try to find one that has good waterproof connections.

[ja17]

Hello,

Also the Bosch electric fuel pump used on the early electronicallly injected 350SLs and 450SLs also the sedan versions, use a pump with almost exactly the same specs. It was smaller simpler used one for years with no problems in a 280SE sedan (M130 injected).  I will try to find a model number and post a pic.

Yes Shvegel, is correct, most of the modern Bosch electric pumps are also more than adequate. In fact they produce such high pressure that a bypass should be fitted to lower the fuel in the system. This procedure is explained in the W107 workshop manual I believe.

Anyway the wrecking yards are full of these pumps. Just be sure to check the pressure to make sure it is high enough and not too high.

[geezer]

ja17,

Are you saying that the later electric fuel pump for the CIS & EFI engines will work in place of the very expensive electric fuel pump for the early MFI systems?

[thelews]

My fuel pump (tall) also stopped working.  When it happened last year, I blew it out and cleaned it up and it worked again...for 900 miles.  Then, this year it pooped out again.  I took it to an electric motor shop where they custom made and replaced the brushes.  Works great now.  $78, two days.

[KUMARB]

It is good to know that the electric fuel pump can be restored by having the carbon bushings replanced at a reasonable price.

I see brand new Bosch electric pumps for 1964 230SL for sale at Autohaus Arizona for $550.

[frav]

Hi,,

Why does this engine need that high fuel flow? >180LPH@1.3kg/cm2 . I have learned that a normal injected engine needs approx 40LPH / 100HP (But i don't know if thats the true). So then a 60LPH should be quite enough for the 230SL engine with 150HP.

Can anyone explain?


Does this MB engine have a FPR (FuelPressureRegulator)? If so, what pressure does it have?

[KUMARB]

I was looking at the MB Parts manual. MB has the part no. 001 091 52 01 for a fuel pump for 1964 230SL. Same part no. is used for a 300SEL 6.3. That means. a fuel pump which is suitable for a 6.3 liter engine must be way oversized for a 2.3 liter engine.

A 230SL cruising at 110Km/Hr uses 11 liters per hour of fuel. This translates into 23.6 miles per gallon(US) of fuel consumption at 69 miles per hour of car speed. Fuel pump discharges the fuel at a constant pressue. Fuel not used is returned to the fuel tank. All the fuel pumps you have listed above perhaps do meet the flow requirement but not the discharge pressure requirement. If a pump is not designed to pump at a continuous pressure of 0.8 - 1.1Kg/sq cm will not work. The pump will either not pump at all since its discharge pressure is not sufficient to pump against 0.8 - 1.1 Kg/sq cm of pressure, or the pump will run overloaded and burn up.  

I have bought MB parts from Autohous Arizona on previous occasions and their prices are reasonable.  I do not know if they ship internationally. They are listing Bosch Pump No. 044 220 10 02 for $550.

These are my thoughts. Please correct me if I am wrong.

Thanks,

[frav]

Hi,,

I think your thoughts are quite right regarding the flow & pressure.

So if the fuel system pressure can stay be between 0.8 - 1.1Kg/cm2 there must be some kind of FPR fitted? I read some thing about "fuel overflow valve" here http://www.sl113.org/wiki/Fuel/Pump, thats maybe the same thing?

Are the MB part.no. 001 091 52 01 & Bosch Part.No.: 0 442 201 002 equivalent?

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I found a list that says the following;
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BOSCH ELECTRIC FUEL PUMP PART # 0 442 201 002

MERCEDES BENZ 220SE 
year Type liter
1965  L6  2.2 
1964  L6  2.2 
1963  L6  2.2 
1962  L6  2.2 
1961  L6  2.2 
1960  L6  2.2 
1959  L6  2.2 
1958  L6  2.2 

MERCEDES BENZ 230SL 
year Type liter Notes
1967  L6  2.3  Late version 
1966  L6  2.3  Late version 
1965  L6  2.3  Late version 
1964  L6  2.3  Late version 
1963  L6  2.3  Late version 

MERCEDES BENZ 250SE 
year Type liternotes
1968  L6  2.5   
1967  L6  2.5   
1966  L6  2.5   
1965  L6  2.5   

MERCEDES BENZ 250SL 
year Type liter Notes
1968  L6  2.5  Late version 
1967  L6  2.5  Late version 

MERCEDES BENZ 280SE 
year Type liter
1972  L6  2.8   
1971  L6  2.8   
1970  L6  2.8   
1969  L6  2.8   
1968  L6  2.8   

MERCEDES BENZ 280SEL 
year Type liter
1971  L6  2.8   
1970  L6  2.8   
1969  L6  2.8   
1968  L6  2.8   

MERCEDES BENZ 280SL 
year Type liter
1971  L6  2.8  Late version 
1970  L6  2.8  Late version 
1969  L6  2.8  Late version 
1968  L6  2.8  Late version 

MERCEDES BENZ 300SEL 
year Type liter
1971  V8  6.3   
1970  V8  6.3   
1969  L6  2.8   
1968  L6  2.8   
1967  L6  3.0   
1966  L6  3.0   
1965  L6  3.0
   
MERCEDES BENZ 600 
year Type liter
1972  V8  6.3   
1971  V8  6.3   
1970  V8  6.3   
1969  V8  6.3   
1968  V8  6.3   
1967  V8  6.3   
1966  V8  6.3   
1965  V8  6.3   
1964  V8  6.3

[frav]

I also found this;

http://www.automotive-tradition.de/en/teile/media/Product_profile_EFP.pdf

Part.No.: F 026 T03 006

[mdsalemi]

I myself, as most know, believe in earnestly trying hard to keep things original.  So, if the Bosch fuel pump fails, I'd replace it with a Bosch, the same model or one designed as a replacement.  Unlike some fuel pumps, for example the notorious SU fuel pumps on early British cars, the Bosch is very reliable.

However I also live in the world (Detroit; The Motor City) where modified vintage cars are all over the place--and so are the parts to make it all happen.  Many early cars (a Deuce coupe, for example) have been refitted with modern engine (350 small block Chevy crate engine, for example) and suspension bits.  For many years, Detroit used mechanical fuel pumps and for the "tuners" these just don't cut it.  Almost all 'rods and similar modified cars have been retrofitted with electric fuel pumps and there are a plethora (there's that word again, Mr. Madison) of sources for them.  Since these are not OEM pumps they almost always need a fuel pressure regulator to balance the pump's capabilities with the needs of the engine.

A good place to start looking is:

http://www.summitracing.com and search under fuel delivery; there are pumps and regulators by Mallory, Summit, Aeromotive, and more.
http://www.jegs.com/

You can also easily find the manufacturer's websites directly; Stewart-Warner and Edelbrock also make electric fuel pumps and regulators.

So, armed with the specs for what you need for a W113, and a few sources, you have the ability to find what you need.  My guess is you can get good, new, high-quality parts for about half the price of the Bosch.  Your issue(s) will be in mounting said pump and regulator, and in ensuring you have the proper fuel line fittings; minor challenges at best for those in the realm of this consideration.

Good luck!

[KUMARB]

Bosch F 026 T03 006, as you indicated, might just do the job.

The Mercedes Electronic Parts Center lists part no. 001 091 52 01 as the fuel pump for 230SL. This is the current Mercedes parts bulletin. This part no. is probably the most desirable replacement, and also the most expensive option. Perhaps, $1,300 or so?

Mercedes Technical Data for Passenger Cars (Printed 1969) indicates Bosch 044 220 007 for fuel pump. Discount parts stores are selling Bosch 044 220 1002 for fuel pump for 230 - 280SL's for $550. These two part numbers look very much identical. One must be later version of the former, I guess. Discount part no. would be my second choice.

I do not know about Bosch F version. Unless I am getting a hell of good deal on Bosch F version, I would consider the above two options first.

With best wishes,