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Old 08-26-2010, 05:01 AM
Luke Mahon
Join Date: May 2008
Location: Australia
Posts: 96
M103 300E engine swap compatability.

So the 300E has had a slight moment, and decided to shoot a piston out the side of the engine block. Lovely.

Down to business, am I best to stick with an M103, or should I upgrade the engine, or go for more economy while I'm at it? a 2.6 perhaps?

Although it would be easier to stick with the 3.0 M103, if anyone has swapped engines successfully I'd be interested in other options.
(And if anyone in Victoria by any chance has one for under 1K, which is the current price I have on one)
I only need the main block. My trans. injection etc is fine.

Cheers guys...

1971 280SE - The S Class
1974 280CE - Sterling
1988 300E - Stanley
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Old 08-26-2010, 07:03 AM
Registered User
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 844
Got a M103 3.0 litre in Campbellfield with 80,000Ks on it for around those dollars. Comes with head and accouterments. There's a workshop there where you can fit the engine.
P.M. me if you need a contact number.
It's got it's 80,000 K transmission attached to it - if you interested in that as well.
Engine came from a 300e.
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Old 08-26-2010, 07:49 AM
Posts: n/a
Go with a 103. The 2.6 would offer no significant fuel economy gain and going to a 104 would be a nightmare given all the electronics changes that would be necessary.
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Old 08-26-2010, 11:06 AM
BAD300's Avatar
Registered User
Join Date: Feb 2010
Location: Melbourne, Australia
Posts: 510
Why would you opt for a less powerful engine? The M103 is as tuff as they come.....never do this man!

um.....why have men got nipples
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Old 08-27-2010, 02:23 AM
ps2cho's Avatar
Registered User
Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,525
As LarryBible said, don't get the 2.6L.

You will find a lack of power with A/C and a few people in the car. Compared to my 3L it is noticeable on load....Stick with the 3L for sure. It doesn't even get any better fuel economy due to the increase of foot needed.
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Last edited by ps2cho; 08-27-2010 at 02:35 AM.
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Old 08-27-2010, 06:29 AM
Luke Mahon
Join Date: May 2008
Location: Australia
Posts: 96
I was simply pondering on the 2.6 due to the possible increase in fuel economy.

Have decided to stick with the 103 3.0Litre.

What rough costs are you looking at to fit an engine... I suspect I may be getting ripped off.

1971 280SE - The S Class
1974 280CE - Sterling
1988 300E - Stanley
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