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Fuel accumulator 0438170004

Started by adamb, 06 February 2021, 01:06 PM

adamb

I've ordered and received a replacement fuel accumulator Bosch 0438170004. This is a two port accumulator and is the correct part for my 1977 6.9. Reading other posts I see that later models have a one port accumulator. The item is stamped Bosch, made in Germany, as per the pics. Surprisingly it is not painted dark green, instead it looks like it's made of stainless steel. Anybody else seen these? Can I be certain that it's a genuine unit and not a copy?

daantjie

Daniel
1977 450 SEL 6.9 - Astralsilber

ptashek

Did you order from Mercedes or is it NOS of some 3rd party site? The OEM part I got a couple years back from the dealership wasn't  made by Bosch, but some company in Czechia. Colour is right though.
1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE

Jed

My bosch unit from a few years ago was also dark green.  I have never seen that finish myself...
1979 Mercedes 6.9 #5206 - restored
1979 Mercedes 6.9 #6424 - ongoing restoration
1976 Mercedes 6.9 #484 - restoration?

nathan

I would think its legit.
whilst in the garage, I pictured this one TJ gave me for my m110 280te resto.
as described, the green type
1979 116 6.9 #6436
2018 213 e63
2011 212 e63
2011 463 g55
2007 211 e500 wagen
1995 124 e320 cabriolet
1983 460 300gd
1981 123 280te

tcj

Bosch moved the production to another plant 2 years ago, and by this they changed to an eco-friendly coating, so accumulators of current production are silver in appearance now.
112.021
113.042
116.028
116.036

Eyeman

I finally got my 6.9 back after over a year long suspension rebuild.  Unfortunately my mechanic did not seem to think fuel accumulators were available.  Even after just shutting my car off for a minute or two I have to crank for 20secs to get fuel back into the system.  Just checking to make sure this thread is correct and that's the part I'll need?  Thanks for your help.
1963 190SL(project)
1977 6.9 (Euro)
1994 Porsche 968 Cabriolet
1994 Porsche 968 Coupe
2008 BMW 135
2017 AMG GTS

rumb

Beside the accumulator, if your injectors are old and leaky it will present the same problem.  If you have issues 1 minute later I would look there.
'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio

Eyeman

Thanks.  I stopped and got gas yesterday.  Took 10secondsish to get fuel back into the system after just a few minutes at the pump.  Mechanic was sure it was the accumulator, is that part number correct?
1963 190SL(project)
1977 6.9 (Euro)
1994 Porsche 968 Cabriolet
1994 Porsche 968 Coupe
2008 BMW 135
2017 AMG GTS

UTn_boy

There were two different accumulators used on the 6.9.  You need to make sure that it is, in fact, a two port version before you buy one.

Up to chassis number 005692 part number 000-476-01-21 is used.  This is the two port version. 

From chassis number 005693 part number 000-476-04-21 is used.  This is the one port version. 

Both show to still be available new from Mercedes.  The single port currently retails for $595 USD and wholesales for $428 USD. 

The two port version currently retails for $386 USD and wholesales for $285.

Both are also readily available on ebay and other parts sources. 

Both accumulators were used on all CIS fuel injected modes, and not just on the W116.  They were also used on R107 and W123 cars. So if you see a listing that mentions only R107 or W123 then it'll be the same part.  Some people aren't all that knowledgeable when they list parts. 

Here is one in Latvia with free shipping for 250 Euros.  And yes, that is a good price.  Don't question it.  https://www.ebay.de/itm/384370812471?epid=1014631496&hash=item597e492637:g:izAAAOSwbP9hMkPC

1966 250se coupe`,black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3,papyrus white/dark red leather
1975 450se, pine green metallic/green leather
1973 300sel 4.5,silver blue metallic/blue leather
1979 450sel 516 red/bamboo

rumb

IF the injectors leak then all the system pressure goes away.  You then have to crank to build the pressure up again. 
Bad accumulator exact same symptoms.

If you haven't ever checked your injectors I would bet that all are leaking. You can get uncle kent's injector cleaning kit, or even better  find a local diesel shop and they can rebuild them. I have kent's tool.  It's amazing how poor nearly all old ones are spraying at first.

0000785623  plus you will want new seals 1160780873 about 2 buck each.

You can get new from MB for about $40 each. Rebuild will cost half that.
'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio

TNNBENZ

I have read several times not to try to remove the plastic holders the injectors are in because that almost always break into many pieces and fall into engine. Is this correct and will  uncle kent's injector tool keep the from breaking ???
Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
Project of Compassion ~ Respect
Silver Green Metallic / Toast
Left Hand Drive
Sliding Roof

rumb

That is precisely why you want to replace them.  They get old and hard.  I dont think they fall apart when you remove them, maybe someone here has had that experience?

The Tool I refer to is used to clean the injectors once you remove them from the car.

https://mercedessource.com/store/cis-gas-fuel-injector-spray-pattern-tester-and-nozzle-cleaner

'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio

Eyeman

Cool, thanks for the help.  Weird enough after my car sat all night it started right up.  Drove it to the gym and it had the same fuel leakdown issue.  I'm mainly worried I'll kill my battery having to turn the motor over so long.  My car has always been a tad difficult to get started.  It might just be tuned better now or maybe before it would flood, but it actually starts great now, it just usually has that long fuel leakdown lag. 
1963 190SL(project)
1977 6.9 (Euro)
1994 Porsche 968 Cabriolet
1994 Porsche 968 Coupe
2008 BMW 135
2017 AMG GTS

rumb

"or maybe before it would flood"
If the injectors leak, then it does create a "flood" situation.
'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio