1991 300D 6-cyl - What's it worth? - Page 2 - PeachParts Mercedes-Benz Forum

400Eric · #16 12-07-2016, 03:41 AM

Quote:

Originally Posted by nicholas

Turns out it really is a om603 (6-cyl) with the newer head style. Runs pretty well, almost no blowby that I could tell through the oil filler cap. I think it needs a new glowplug or two since it misses and puffs smoke when starting and cold a bit. I've put in new synthetic diesel oil and capped the EGR. It cruises along pretty well. I feel like it could be faster, though - no turbo surge as I'd expected, and kind of underwhelming off the line. I'll be doing a diesel purge and reaming the glowplug holes as well (maybe clean out the intake manifold at same time).

I'm still a little confused. So it really is a 91 W124 that really came from the factory with the six?

nicholas · #17 12-08-2016, 06:30 PM

Yeah, it's the 6-cylinder with the later head stamp (17). In Europe and Japan they continued to have the W124.133 combination (W124 6-cylinder turbo). In US, apparently only 1987's had the 6-cylinder. After which only the turbo 5-cylinder (300D 2.5) was available. I think MB maybe limited the US to the 5-cylinder to mitigate warranty repairs for the early #14 head cracking issues on the 6-cylinders they had been dealing with.

400Eric · #18 12-09-2016, 04:26 PM

Maybe also because they wanted to upsell/force U.S. buyers seeking a six to buy an S-class.

That is quite a find!!!