w124nut
Active Member
Jack,
I think that you have the M103.983 engine produced for 300CE's between 1988 - 1989.
Your engine management system is the CIS - E (continuous injection System-Electronic)
Your engine bore and stroke is 88.5 x 80.2 mm with a displacement of 2,960cc.
Compression ratio 9.2 : 1 with a firing order of 1-5-3-6-2-4
Maximum engine speed 6,200 and horsepower 177 @ 5,700 torque 188 @ 4,400
Wonderful things books and internet :0)
I think that you have the M103.983 engine produced for 300CE's between 1988 - 1989.
Your engine management system is the CIS - E (continuous injection System-Electronic)
Your engine bore and stroke is 88.5 x 80.2 mm with a displacement of 2,960cc.
Compression ratio 9.2 : 1 with a firing order of 1-5-3-6-2-4
Maximum engine speed 6,200 and horsepower 177 @ 5,700 torque 188 @ 4,400
Wonderful things books and internet :0)
bolide
MB Enthusiast
Last edited:
James1976
Active Member
- Joined
- Jul 18, 2010
- Messages
- 218
- Location
- Borough, London
- Car
- 94 300 SL-24 in Bornite, 2010 Smart Fortwo Passion
if it's a 24 valve it's an M104.
grober
MB Master
THE 300 -24 is a sort of " hybrid" Its a twin cam engine so technically a M104 but with the separate earlier fuel injection KE Jetronic and EZL ignition systems.
description from another forum
The M104 3.2 liter engine was a straight six engine from 1993-1995 in the W124 chassis '93 300E (3.2) / '94-'95 E320, from 1996-1997 in the W210 chassis E320, and from 1991-1999 in the W140 chassis S320.
The 3.0 liter-24 valve M104 engine is an early version of the 24-valve DOHC 3.2 liter M104 engine used from 1993-on. The 3.0 liter version still used the CIS-E fuel injection system, using a distributor with one coil wire and 6 spark plug wires. This is basically a mechanical injection system with electronic control.
The "modern" 3.2 liter M104 engine was used in all U.S. 1993 and later 300E (3.2)'s, 300CE's, 300E Cabriolet's, 300TE wagon's, and '94-'95 E320's. Note that all 1993 300E / CE / TE's are misbadged as the engine is a 3.2 liter engine. The badging error was corrected starting in all 1994 models, but only the logisticians at Mercedes have the answer for this one.
The 3.2 liter M104 engine uses a different ignition system - HFM (hot-film mass air flow sensor), fully electronic with integrated electronic ignition and sequential fuel injection. This system combines fuel injection and ignition control in one module. HFM-SFI systems use coils that are mounted directly on the spark plugs, replacing the distributor at the front of the engine. Each coil pack provides spark to two spark plugs at the same time, one connected directly to one plug, and the other with a short high tension lead to the next spark plug. So there are 3 coil wires and 3 high tension lead wires.
HFM fuel injection systems are designed so that idle speed can't be adjusted. Idle speed is completely controlled electronically. This HFM injection system also has adaptive technology that compensates for conditions such as engine wear and unmeasured intake air and is designed to maintain driveability as the engine ages.
HFM-SFI can retard engine knocking to just the knocking cylinders, unlike EZL technology, which retards spark timing across the entire engine. This keeps the ignition timing point as advanced as possible for maximum power output.
The 3.2 liter M104 engines also have variable valve timing on the intake cam, making the torque curve broad and flat, developing HP at a much lower rpm. This makes the power much more useable and noticeable.
Here's a short video of the 300-24V engine notice the metal pancake air filter and no "cross engine air" duct
[YOUTUBE]0ybR6SDyn70&feature=related[/YOUTUBE]
description from another forum
The M104 3.2 liter engine was a straight six engine from 1993-1995 in the W124 chassis '93 300E (3.2) / '94-'95 E320, from 1996-1997 in the W210 chassis E320, and from 1991-1999 in the W140 chassis S320.
The 3.0 liter-24 valve M104 engine is an early version of the 24-valve DOHC 3.2 liter M104 engine used from 1993-on. The 3.0 liter version still used the CIS-E fuel injection system, using a distributor with one coil wire and 6 spark plug wires. This is basically a mechanical injection system with electronic control.
The "modern" 3.2 liter M104 engine was used in all U.S. 1993 and later 300E (3.2)'s, 300CE's, 300E Cabriolet's, 300TE wagon's, and '94-'95 E320's. Note that all 1993 300E / CE / TE's are misbadged as the engine is a 3.2 liter engine. The badging error was corrected starting in all 1994 models, but only the logisticians at Mercedes have the answer for this one.
The 3.2 liter M104 engine uses a different ignition system - HFM (hot-film mass air flow sensor), fully electronic with integrated electronic ignition and sequential fuel injection. This system combines fuel injection and ignition control in one module. HFM-SFI systems use coils that are mounted directly on the spark plugs, replacing the distributor at the front of the engine. Each coil pack provides spark to two spark plugs at the same time, one connected directly to one plug, and the other with a short high tension lead to the next spark plug. So there are 3 coil wires and 3 high tension lead wires.
HFM fuel injection systems are designed so that idle speed can't be adjusted. Idle speed is completely controlled electronically. This HFM injection system also has adaptive technology that compensates for conditions such as engine wear and unmeasured intake air and is designed to maintain driveability as the engine ages.
HFM-SFI can retard engine knocking to just the knocking cylinders, unlike EZL technology, which retards spark timing across the entire engine. This keeps the ignition timing point as advanced as possible for maximum power output.
The 3.2 liter M104 engines also have variable valve timing on the intake cam, making the torque curve broad and flat, developing HP at a much lower rpm. This makes the power much more useable and noticeable.
Here's a short video of the 300-24V engine notice the metal pancake air filter and no "cross engine air" duct
[YOUTUBE]0ybR6SDyn70&feature=related[/YOUTUBE]
The early 104, right?
w124nut
Active Member
It's a M103 guys, built in 1988. So for my money, a M104 engine is out of the question.
grober
MB Master
Agreed the first 300-24v came out at the 1989 Frankfurt show-- so unless the car's had an engine transplant its going to be a M103 single cam engine.
bolide
MB Enthusiast
So we can say fairly authoritatively that:
* 12-valve = M103
* 24-valve = M104
Nick Froome
the independent Mercedes Estate specialists
w124nut
Active Member
grober
MB Master
Post a picture of your engine and we will soon tell you! You may have had a transplant?
Ian B Walker
MB Enthusiast
- Joined
- Jun 7, 2003
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- 7,668
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- Freckleton
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- 300-24, saloon and coupe, E300 24 valve diesel estate
My 1991 coupe (300-24) is a 104 engine. Like the picture in the previous video clip. If it has a black thin rocker cover it is 12 valve. Cream and wide (with a black bit in the middle) then 24 valve
