W210 E300TD OM606 – injector question.
Thread Starter
Junior Member
Joined: Jan 2007
Posts: 56
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From: Dublin, IE
1997 W210 E300 TD Estate
W210 E300TD OM606 – injector question.
Are the injectors mechanically or electronically controlled?
Also What Pressure does the Fuel Pump work at, (roughly)?
Also What Pressure does the Fuel Pump work at, (roughly)?
Super Member
Joined: Jul 2005
Posts: 731
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W210 W140
I wish I could answer these questions for you. Hopefully someone will be able to chime in. If not, also check out the www.mercedesshop.com website. There are a bunch of dieselheads on there that may know the answer.
I'm curious to learn the answer as well. I will take a guess and say that the injectors are electronically controlled.
I'm curious to learn the answer as well. I will take a guess and say that the injectors are electronically controlled.
Super Member
Joined: Mar 2006
Posts: 545
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From: Northeast
e300d
There are no electrical connections to the injectors. I'm sure the FI pump would be condsidered electronically controlled.
The newest diesels inject fuel around 2000Bar. VW diesels built around the time of the W210 diesels were around 20,000 psi. The Benz is likely somewhat lower than 20,000 psi since it's IDI. I'd guess around 12,000 psi for the turbo cars...perhaps higher.
Banned
Joined: Apr 2006
Posts: 1,116
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From: Federal Heights, CO
1982 300D VNT, 1980 240D 3.0T, 1982 300TD
The injection pump is electronically controlled. The injector nozzle pop pressure is 135bar (1,958psi). Feed pressure to the injection pump is about 14psi.
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From: Toronto
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
I am amazed at the difference in nozzle pressure between the old and new diesel engines - 10 times. Does it mean the old engines will last much longer than the new ones? With 20,000 psi you can cut rock sheets open with water.
Banned
Joined: Apr 2006
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From: Federal Heights, CO
1982 300D VNT, 1980 240D 3.0T, 1982 300TD
The lifespan is not significantly different. The 20,000psi injection system was designed from the start for those pressures. It only becomes a problem when poorly designed aftermarket tuners crank up the rail pressure to get more power from the engine.
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From: Toronto
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
It is good to know the electric high pressure injectors do not affect the longevity of the engine. I do not like certain features of my 2006 CDi and the two most obvious ones are:
1) The lack of dipsticks. I do not know why MB did that. The oil one returned in 2007.
2) The shrouding of the engine bay, top and bottom with black plastic. All leaks are hidden from view until the warranty is over. Maybe that is one of the reasons MB is using the suction method in oil changes too. There is no need to remove the bottom shield (savings in labor).
I had the oil changed today and found the transmission leaking from the "sealed for life" device. Same area as my sold E55 - where the transmission sensor goes into the transmission. Going to MB next week for warranty work!
1) The lack of dipsticks. I do not know why MB did that. The oil one returned in 2007.
2) The shrouding of the engine bay, top and bottom with black plastic. All leaks are hidden from view until the warranty is over. Maybe that is one of the reasons MB is using the suction method in oil changes too. There is no need to remove the bottom shield (savings in labor).
I had the oil changed today and found the transmission leaking from the "sealed for life" device. Same area as my sold E55 - where the transmission sensor goes into the transmission. Going to MB next week for warranty work!
