I dare say, with some work its possible to install a 300D Turbo 617.952x engine in the 220D....

But, Then it aint 'original' You'll have to source motor-mounts from a 240D 3.0 to physically fit it and the drive-shaft will be different length....

The oil-filter will need re-locating as the 617 turbo has it at the back and not at low-level like the 220D.....

Anything is possible, just time and dosh....

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

The motor itself isn't that old... about 9 years or so. It has the same pep it did when rebuilt.... I was just curious if I could get a little extra. I have used it a lot in city... this is my first job where 650+ mile weeks are becoming common..

That mileage problem comes from the low cetane excuse that's being sold as road diesel nowadays. When your car was built, the average cetane of pump diesel was about 48 to 50. Today, you're lucky to get anything close to 40...basically, 17% less energy per gallon.

I would make sure the engine is to spec...valves adjusted, etc. Use synthetic lubricants and add a cetane booster like Power Service or Stanadyne cetane additive to your fuel at each fill-up.

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Never a dull moment at Berry Hill Farm.

I did notice a nice gain with the cetane boost I have been using.... about 40 miles or so a tank more

Try to only drive downhill.

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1979 240D, 4spd manual, Power Sunroof, manual windows, 147k miles, Pastel gray/Black MB Tex.
1991 300D 2.5 - Smokes like it's on Crack!

Propane it.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Your car already has a cold air intake.

Power costs fuel. The more power you want, the more fuel you will use. Your car has a pneumatic injection pump governor so adding a turbo will cause problems.

23-25 MPG is exactly what a 220D should average.

That won't increase economy, it will substitute fuel use and give an imaginary MPG increase.

I was hoping to get just a little more

why was the motor replaced? Did someone make a mistake and ruin it?

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

At your own risk get a presure reading of your base fuel pressure in the injection pump. Make sure it is adaquate on the highway.

You can read all the threads on stretching the relief valve spring. This is just for general knowledge. I would not overboost that pressure but just make sure it is high normal at cruise. If the pressure is very low at present it will have some negative effects milage and power wise. The car will still seem to run normal though.

There is no risk in checking and if required bringing it back to about where it should be if the need is indicated. Actually just a part of good general maintenance anyways.

The risks start if you elevate the fuel supply pressure beyond normal. It could have even been substandard the last time the engine was rebuilt unless someone checked it. At that time highly unlikely if it ran reasonable.

These cars like the 240d want everything that was present at the time of being new still functioning properly. Pretty inexpensive area to look into as well. Cost you a cheap glycercine filled 0-30 pound gauge. A piece of hose and a few fittings to start.