New Member, one question, please... - PeachParts Mercedes-Benz Forum

STORMINORMAN · #1 05-22-2002, 12:43 PM

How did I ever miss this site? Never mind, that is NOT my "one question"...

We are the owners of a '91 420SEL, our first Mercedes. 120K miles, just performed the 60K major service, everything is just wonderfull! What a car!

As to the question:

Are there any sources/options available out there vis-a-vis replacement short or long-block PERFORMANCE ENGINE upgrades for this 4.2 motor? I keep reading about Mahle pistons, other camshafts, various AMG modifications, etc. This historically all seems to be directed towards the 5.0 and 5.6 motors. I'm not having any problems with my car but plan to keep it for as long as possible (it really is just broken in) and am the kind of person who tries to do the advance research & planning as far in advance as possible. I recognize this is not the same as finding a long block for a 350 Chevy or 302 Ford...

Thanks in advance for your consideration!

Kuan · #2 05-22-2002, 01:31 PM

First of all, welcome to mercedesshop! I can't answer your question, but you may have better luck asking in the performance paddock forum.

Kuan

#3 05-23-2002, 04:14 PM

I don't have an answer for you either stormin sorry. You will prob get one after a long enough post though. However, I knew a guy who was sold a goldwing by a storminnorman he said was a weather forcaster in Baltimore, MD. Any relation?

Frank X. Morris · #4 05-24-2002, 08:21 PM

Howdy Storminorman,
I don't have an answer either, I'm just trying for a hat trick

#5 05-24-2002, 10:14 PM

From what I have seen the 420's don't have the preformance parts because they are not geared towards power like the other v8s. (I'm not saying they are slow) They are known for being a very strong engine that can go for a long time. I personally think that 120k is very low mileage on a w126 and that they may look slow but they are a sleeping giant waiting to woken up.

O YA BTW
WELCOME