Mercedes 2.5-16 engine swap... - Mercedes-Benz Forum
 
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post #1 of 9 (permalink) Old 12-14-2014, 06:22 AM Thread Starter
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Question Mercedes 2.5-16 engine swap...

Hallo people
so i'm new in this site, actully first post i write here .
Recently i bought a 2.5-16 engine because i like it , and i thought to replace the old engine in my MB W123 84 m102 2.3 from W124.
so my question is have anyone done that here? i need help any information will help. what do i have to buy? will it cause problems, like replacing or changing engine Bases? Gearbox change? Diffs, Axles
i have enough knowledge but not sure
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post #2 of 9 (permalink) Old 12-14-2014, 06:26 AM
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Good, high-rev'ing motor.... but not a good match for the W123.

The motor is also costly in maintenance.

You can probably make it work, but don't expect the car to act and feel anywhere like a 190E with that motor.
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post #3 of 9 (permalink) Old 12-15-2014, 05:09 AM Thread Starter
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Exclamation Thank you Dr.Grillz

i'll take your advice not to swap the engine, i better look for 190E for it.
What engine do you recommend that reaches approximate 200HP and can Handle a Supercharger or Turbo for W123
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post #4 of 9 (permalink) Old 12-15-2014, 05:51 AM
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M104 =>


turbobandit.com

1992 190E 1.8 <=>2.0 201.018 =>
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Don't leave that there I'll take it to bits
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post #5 of 9 (permalink) Old 12-16-2014, 03:07 PM
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or m110 with a turbo, or a m103, or a om602/3/5/6 with turbo and modded pump, or a regular 2.3 liter m102 from a w124/w201...

200whp isnt that much


no matter where you put that engine, do the timetaking valve adjustment, its a cosworth head okay :P and burning a few valves wont be cheap :P


btw, the w123 chassis withstand ridiculous amounts of power without any mods, a 2.5 16v wouldnt be bad at al in my world..
a sleeper is always fun...
my w123 om602 keeps up without a problem to my brothers 2.3 16v 190E, althout cornering isnt the same obviously since i have stock high springs in the w123. got other cars where springs+shocks is taken care of, and they behave ridicously well.

Daily: w123 om602 7.5mm 200whp
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Last edited by swampmonkey; 12-16-2014 at 03:10 PM.
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post #6 of 9 (permalink) Old 12-16-2014, 11:16 PM Thread Starter
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Lightbulb problem with Diesel

The problem is Diesel engines not allowed where i live, it would've been a perfect solution, here we have very bad quality Diesel.

i think i'm ganna go with M103 or M104 seems promising engines
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post #7 of 9 (permalink) Old 12-17-2014, 04:32 AM
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Quote:
Originally Posted by caucazi View Post
The problem is Diesel engines not allowed where i live, it would've been a perfect solution, here we have very bad quality Diesel.

i think i'm ganna go with M103 or M104 seems promising engines
it will be quite tight towards the front and back of engine,

a w124 radiator fits in there without a problem, both the largest and the thinner one, might be an idea to remove the mechanical fan, and go with a large electric one in front of the radiator. you save some space that way..

(ive got a om606 in a w123, the sixcylinder diesel, and sizewise, they are about the same as the m104) and no way to fit the mechanical fan in between the radiator and engine.

a large w124 radiator is quite an upgrade from the stock w123, and since it is plugandplay there is no reason to not go there.

ive got the w124 300d enginemounts on the engine in the w123, and it works good, althou it is quite tight towards the back of the engine. you dont have to fabricate as much new as one could think.


are you going for manual/automatic? where do you live?

a different differential, 3.07/2.88 or something alike will do good to fuelconsumption and comfort with a fivespeed, and if going for fourspeed automatic, something even higher geared, 2.65 or something.
PlaneCrazy likes this.

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post #8 of 9 (permalink) Old 12-18-2014, 08:33 AM Thread Starter
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the radiator will not be a problem, Large electric fan will do or intercooler if i mount Turbo to engine.
and ofcourse manual Gearbox, I already have it on w124 m104 engine, 5-speeds i guess that will do good?!
I recently changed the Diff Ratio:3.69 but its not very good, any idea where to find LSD for w123?

I live in Jordan , here in jordan the MB W123's alot alots of them but no Diesel Engines some of owners put 1jz engines
i dont like the idea of putting Japanisch engine in Deutsches Autos.

if you have more thoughts please do share because it'll be useful to me.

Regards.
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post #9 of 9 (permalink) Old 12-18-2014, 11:08 AM
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Quote:
Originally Posted by caucazi View Post
the radiator will not be a problem, Large electric fan will do or intercooler if i mount Turbo to engine.
and ofcourse manual Gearbox, I already have it on w124 m104 engine, 5-speeds i guess that will do good?!
I recently changed the Diff Ratio:3.69 but its not very good, any idea where to find LSD for w123?

I live in Jordan , here in jordan the MB W123's alot alots of them but no Diesel Engines some of owners put 1jz engines
i dont like the idea of putting Japanisch engine in Deutsches Autos.

if you have more thoughts please do share because it'll be useful to me.

Regards.
a w124 radiator and a intercooler in the front is doable and good..
the om606 i talked about btw
Enginebay | Mercedes-Benz turbo

the gearbox probably wont survive any powerincrease, what gearbox do you have? are atleast 6 normal on the w124....
if you want power you need another, the fivespeed from the 2.5 16v 717.404 or a sixspeed from a 270CDI (717.65x) or a fivespeed from the w123 200T or 230E... (717.401)

LSD = 450SE 6.9 or some 380SE or 500SE w126, the r107 and w116 450 might have it to...
different gearings on al of them.

Daily: w123 om602 7.5mm 200whp
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