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Jackd 02-18-2002 02:31 PM

Engine swap
Can a 1990 300E engine (3.0liters) be installed as a replacement for a tired 2.6liter in a 1989 (W124).
Both cars have the same transmission?
Stater/alternator/exhaust manifold/pipes system are the same?
Ignition/fuel injection the same?
Is it a direct replacement or is this looking for major problems?
Thanks for your input.

Jackd 02-18-2002 04:22 PM

Anyone has a any comments^

sixto 02-19-2002 05:19 PM

I've never done it, but it should be a bolt-on affair. Keep the fuel injection components with the 3.0l engine to be sure. You may have to transfer some electricals as well.

91 300SE
81 300SD

MIKE FREEMAN 02-19-2002 06:12 PM

Engine Swap
If I remember right the 2.6 has a 722.4 trans behind it and the 3.0 has a 722.3, otherwise it's a bolt in job.
If one were aware of the limitations of the 722.4 trans. it could be used.
The 722.4 trans is a light weight version of the 722.3 and should be treated as such.

sixto 02-19-2002 06:23 PM

260E, 300E 2.6 = 722.409
86-88 300E = 722.320
88-91 300E = 722.358
92-93 300E = 722.359

You da man, Mike.

Probably best to keep the transmission with the engine.

91 300SE
81 300SD

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