3.6 M104 engine

[MDMB69]

I have two M104 engines both 1995, one is a 2.8 and one is a 3.2.
I’m looking at up-rating to 3.6 spec.

I’ve been trawling through the parts listing on the internet from different sources and as far as I can see all of the top end and the fuel system is identical for all 3 engines.

E.g. All of the following part numbers for all 3 engines are the same.

Camshafts (both)
Inlet and exhaust valves
Fuel injectors
Fuel pressure regulator
Fuel pump (although there was a change to twin pumps on some models)
Throttle body (actuator)

Can anyone correct me if they know for a fact that this is wrong?


Obviously there is a capacity increase.

From what I’ve read on the internet:

The 3.6 engine starts as a 2.8 and is oversized to 3.6 (with 3.5 diesel crank)
It uses the 3.2 inlet manifold (I can’t confirm yet that this is different to the 2.8)


Things I know for fact also are:

There is also has a better exhaust system, extra inlet pipe to the airbox, (same box though) and a bigger cross section inlet pipe across the top of the engine.

I’m sure the ECU will have different settings for fuelling e.t.c. but can anyone enlighten me on any other differences.

 

[grober]

I,m guessing but uprated CRANK bearing material and an uprated oil pump??? forged pistons? Bigger radiator?? Since camshaft timing is variable via the ECU the standard cams would be OK. there are guys on here who own said machinery so they would know for sure. Some folks suggest using the early C class 3.6 motor since its essentially the same.
RENNTECH in the states still appear to do a conversion at a price! http://www.renntechmercedes.com/PDF/Models/W124_E.pdf

 

[aka$h]

The Rads are the same size on a 3.6 as a 3.2. If your thinking about boring the bottom end out of a 3.2 Ive looked into it and youll find most places will only want to go as far as taking it to a 3.4.
id be interested to know the differences too, if its possible to modify the 3.2 then great!