Meet Silvia the s211 e55 7 seater
- Thread starter merc85
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OP
So Thread Back on track today, After fitting the new Fuel module "filter" part the car seemed tobe running ok, We are going away this wkend to MB world so wanted to much sure the car was running ok, I took it on a 122mile drive to one of our suppliers in Basildon to collect some Rotating electrics we had built. On the way down there i i managed to get 30mpg, then i started to do a few hard pulls and all seemed well.
On the trip back i put the car into (s) mode and drove it hard using the paddles when overtaking just to put the pumps under some pressure, i managed around 70 miels like this then yep she's starting to cough at high Rpm thats over 4k btw she did pull but still stuttered not quite as bad as before.
That was decision made, We tackled the Walbro install.
This is the 1 half of the Pump without the level sensor
You can see the state of the Filter bottom right, and the pumps were stillquite warm even after the car had sat for 45 mins and the pump being removed.
The legs of the internal housing are glued to the pot we broke this glue using a small stanley blade tough going but effective, We have made it so everything is totally reversible if so wished so in keeping with the car. The Pipework to the side is a vent/pickup this is located in the bottom of the pot. The walbro was about 3min higher than the Oe and 5mm wider at the bottom so we cut out the bracket but left the vent connetion, Also the new filter sock was larger than stock so this was zip tide against the upper side of the pump allowing us to position the pump , sock, and vent correctly but still retaing the 3 pronged oe holder
And this is what it looked like after tweaking
Then the blooming awkward part, trying to do the same with the other half of the pump with the level sender! The level sender comes out thank god by pressing a flat blade screwdriver between the clips, and it allows the sender to slide up and out so you can serparate the 3 pronged holder and fit the new pump. This is exactly the same process as the other.
Clip to the left of the image
Once all refitted it should like like this
Then its basically cutting the loom then join the new loom/plugs to the oe connectors to the top hat of the pump assembly.
The 6mm hose supplied was jubliee clipped onto the Square connectors from the left hand level sendor/filter housing again using jublee clips supplied. Pipe length wasa bout 2 1/2 inchs any more and this would foul the lid. This was all done car primed and hey presto!! she fired into life immediatly!
The exhaust note is deeper, certainly brought back memories of my t5's after doing similar, The idle was spot on gone was the little vibe the car would get when cold it ticked over immaculately.
The increase in power is truly amazing, i always thought the car seemed slow compared with Brutus which had a Pulley and map, But now My GOD the bloody thing shifts like S*** off a stick lol, Easily lighting up the traction light on the dash even in comfort mode, until this mode id never ever seen it light up at all.
I drove the car to Colchester aprox 20miles to fill the tank and make sure the fuel light came on and went out correctly which it does
Also managed 30 mpg on the way back home.
And these are the old fuel pumps, made by VDO
Gone is the hesitation at rpm and the car seems so much quieter id definitely recommend this upgrade if your pumps are tired.
If on the other hand you want to keep it stock, the part numbers for the pumps is.
993762145 / a2c53044857z
These can be had of the net and are a direct fit for around £80.
So there you have another job jobbed
On the trip back i put the car into (s) mode and drove it hard using the paddles when overtaking just to put the pumps under some pressure, i managed around 70 miels like this then yep she's starting to cough at high Rpm thats over 4k btw she did pull but still stuttered not quite as bad as before.
That was decision made, We tackled the Walbro install.
This is the 1 half of the Pump without the level sensor
You can see the state of the Filter bottom right, and the pumps were stillquite warm even after the car had sat for 45 mins and the pump being removed.
The legs of the internal housing are glued to the pot we broke this glue using a small stanley blade tough going but effective, We have made it so everything is totally reversible if so wished so in keeping with the car. The Pipework to the side is a vent/pickup this is located in the bottom of the pot. The walbro was about 3min higher than the Oe and 5mm wider at the bottom so we cut out the bracket but left the vent connetion, Also the new filter sock was larger than stock so this was zip tide against the upper side of the pump allowing us to position the pump , sock, and vent correctly but still retaing the 3 pronged oe holder
And this is what it looked like after tweaking
Then the blooming awkward part, trying to do the same with the other half of the pump with the level sender! The level sender comes out thank god by pressing a flat blade screwdriver between the clips, and it allows the sender to slide up and out so you can serparate the 3 pronged holder and fit the new pump. This is exactly the same process as the other.
Clip to the left of the image
Once all refitted it should like like this
Then its basically cutting the loom then join the new loom/plugs to the oe connectors to the top hat of the pump assembly.
The 6mm hose supplied was jubliee clipped onto the Square connectors from the left hand level sendor/filter housing again using jublee clips supplied. Pipe length wasa bout 2 1/2 inchs any more and this would foul the lid. This was all done car primed and hey presto!! she fired into life immediatly!
The exhaust note is deeper, certainly brought back memories of my t5's after doing similar, The idle was spot on gone was the little vibe the car would get when cold it ticked over immaculately.
The increase in power is truly amazing, i always thought the car seemed slow compared with Brutus which had a Pulley and map, But now My GOD the bloody thing shifts like S*** off a stick lol, Easily lighting up the traction light on the dash even in comfort mode, until this mode id never ever seen it light up at all.
I drove the car to Colchester aprox 20miles to fill the tank and make sure the fuel light came on and went out correctly which it does
Also managed 30 mpg on the way back home.
And these are the old fuel pumps, made by VDO
Gone is the hesitation at rpm and the car seems so much quieter id definitely recommend this upgrade if your pumps are tired.
If on the other hand you want to keep it stock, the part numbers for the pumps is.
993762145 / a2c53044857z
These can be had of the net and are a direct fit for around £80.
So there you have another job jobbed
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Excellent stuff, well done.
So as I understand it, rather than replace the entire pump(s) pot/module you went for just changing the actual pumps?
Guessing the reason for this is the cost rather than buying the entire part from the MB dealer.
Then you went for the Walbro pumps rather then the direct VDO equivalent?
So as I understand it, rather than replace the entire pump(s) pot/module you went for just changing the actual pumps?
Guessing the reason for this is the cost rather than buying the entire part from the MB dealer.
Then you went for the Walbro pumps rather then the direct VDO equivalent?
OP
OP
Yep spot on Pat, There's nothing wrong with the pot or sender, so i thought id change the pumps, The Stock pumps flow around 300LPH each, The Walbro's flow 400LPH and my God the power is there as soon as you press the pedol lol jeez seriously it blooming flies! of course the old pumps were struggling so the difference maybe not so noticeable to anyone who has good working pumps.
OP
OP
I thinks thats been said before but yes Fingers crossed for a good drive tomorrow to Surrey
Nice MPG figureI thinks thats been said before but yes Fingers crossed for a good drive tomorrow to Surrey
Ooo to Surrey.
I would say pop by and put your car on the lift but my car is stuck their at the moment. Need to grab some parts from Mercedes.
renault12ts
MB Club Veteran
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So, the new pumps mean you have the correct pressure where needed at the right time whatever the throttle position?
I wonder if I might need a new pump, because some of what you describe (hesitancy etc) I have.
Why would the exhaust note be deeper?
I wonder if I might need a new pump, because some of what you describe (hesitancy etc) I have.
Why would the exhaust note be deeper?
OP
OP
I've no idea but it definatly sounds it, Engine seems quieter too, The Sender unit in the other side with the Filter in it regulates the fuel pressure it has a FPR in the bottom of the unit, Perhaps if the Filter is clogged the pumps then have to work harder to get the fuel to the Regulator.
Id imagine after 15 years these pumps do get weak.
renault12ts
MB Club Veteran
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The CL pump seems to be external...so an easier job...perhaps.
With the added flow rate and pressure is there any danger of blowing lines etc...in your opinion?
With the added flow rate and pressure is there any danger of blowing lines etc...in your opinion?
OP
OP
Shouldnt be any increase in pressure as thats Controlled by the reg, the Oe pumps run a Max of 4.4bar the Walbos can support upto seven.
As im lead to believe you get more flow at the same Rate of pressure. "dont ask me how that works" lol, BUt you can certainly feel the difference when you put your foot down. Up until then it drives completely like normal
Blowing lines hopefully not, We used everything supplied and i haven't touch wood had any issues like that with the other Turbo'd Volvo's ive used Walbros in before.
As im lead to believe you get more flow at the same Rate of pressure. "dont ask me how that works" lol, BUt you can certainly feel the difference when you put your foot down. Up until then it drives completely like normal
Blowing lines hopefully not, We used everything supplied and i haven't touch wood had any issues like that with the other Turbo'd Volvo's ive used Walbros in before.
chrisk2010
MB Enthusiast
I'm glad you have got this all sorted i was going to drop you a PM the other if you wanted help with the pumps but i have been so busy at home with building works, work and the kids i just plain forgot and i haven't been receiving any email updates till this morning.
OP
OP
Hey no worries Chris thankyou though bud, The chap who works for me is a Qualified mechanic and friend, i'm self taught there isn't to much we cant do, If id had a lift we had probably done the tank aswel when it was needed.
Finger's crossed "Touch wood" i wont have to touch anymore for abit.
Finger's crossed "Touch wood" i wont have to touch anymore for abit.
OP
OP
Sealed for life they said,, Errrr i think not!
I spilt some of the Black fuel upon opening but you get the idea, lots of swarf in the bottom from the pumps i reckon
No markings on the Filter, BUt i have the diamensions and a supplier of ours does them, So i've ordered a new filter and seal then a clean and reassemble it and its good togo again
To late for me but may help someone else out.
I spilt some of the Black fuel upon opening but you get the idea, lots of swarf in the bottom from the pumps i reckon
No markings on the Filter, BUt i have the diamensions and a supplier of ours does them, So i've ordered a new filter and seal then a clean and reassemble it and its good togo again
To late for me but may help someone else out.
grober
MB Master
Could be its a FEBI 39831
See if the dimensions match up?
febi | 39831 | Fuel Filter with seal ring | bilstein group partsfinder
https://partsfinder.bilsteingroup.com/pf-document/febiInfoKraftstoffein_D.PDF
See if the dimensions match up?
febi | 39831 | Fuel Filter with seal ring | bilstein group partsfinder
https://partsfinder.bilsteingroup.com/pf-document/febiInfoKraftstoffein_D.PDF
KeithJG
Active Member
Gav...I am pleased you decided to fit the Walbro`s.
Yes, me also being an ex Volvo chap as you know i did replace my fuel pump in the T4 first and again in the T5.
There was nothing wrong with either of my pumps but did the upgrade because i was tweaking the turbo and wanted to make sure the fuel was adequate for the performance.
The standard pressure on the T4 iirc was 225psi which was also the number on the Walbro pump fitted by Volvo it was GJ225.
So then to upgrade to the 400lpm Walbro did give a great deal of difference to the feel of the motor and it`s sound.
The reason it feels faster is because the pressure is now higher when the fuel leaves the injectors and the reason a different sound because the burn is more complete.
Quite a good upgrade as the fuel consumption does not alter only if you use the power.
Yes, me also being an ex Volvo chap as you know i did replace my fuel pump in the T4 first and again in the T5.
There was nothing wrong with either of my pumps but did the upgrade because i was tweaking the turbo and wanted to make sure the fuel was adequate for the performance.
The standard pressure on the T4 iirc was 225psi which was also the number on the Walbro pump fitted by Volvo it was GJ225.
So then to upgrade to the 400lpm Walbro did give a great deal of difference to the feel of the motor and it`s sound.
The reason it feels faster is because the pressure is now higher when the fuel leaves the injectors and the reason a different sound because the burn is more complete.
Quite a good upgrade as the fuel consumption does not alter only if you use the power.
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Surely there is a pressure regulator so despite a higher pump output the overall fuel delivery pressure will remain the same unless the original pump did not reach the regulated maximum? Injectors also have a flow limit unless upgraded?
Unsure how you can compare pumps directly unless you are using the same units to compare, 225psi and 400lph (not m) is not a comparison.
Also, increasing fuel flow alone without increasing air / oxygen intake and exhaust would not produce more power?
