[W126 Coupe] V12 SEC

[Gregory Mailloux]

Let me introduce my personal opinion on this
conversion. First having viewed the actual install I
can honestly say that if one did not know that the 126
sec did not come with this engine that this was stock.
It is quite a tight fit and service will be a
challenge but other than that the whole car looks
sweet. What I want to know is this, Satish have you
added the cost of new rear tires into the equation?

Greg M
--- Satish Tummala <satish at tummala.net> wrote:
> You forget,
> 
> The 119 cost me $5000 total (no labor cost),  The
> V12 cost me about $8K
> (no labor cost).  If I sell the 119 with trans, it
> will cost me around $3K
> net difference to upgrade to the V12.  I spent
> nearly $16k for the 6.0L
> 117 motor, got $13,500 back so not much difference.
> 
> That makes $5K plus $2500 = $7500 TOTAL over 6
> years.  That upgraded the
> whole engine, transmission, all belt drive stuff,
> computers, etc.
> 
> Of course, if someone else was to have it done, it
> could approach $100K
> easy.  I would estimate $7000-$10000 in just labor
> alone for the V12 +
> engine.
> 
> I certainly wouldn't advise anyone to go buying new
> V12s, rather used or
> better yet, a whole wrecked car would be best.
> 
> The 10 computers plus EZLs and harnesses are $17500
> from Mercedes.  The
> long block with belt-drive items.  The two throttle
> motors are $7000 for
> the pair, the smog pump is $2000 with the clutch,
> etc., etc.
> 
> Definately, buy used stuff and go through it all.
> 
> Also, you CANNOT use a W140 V12 engine for direct
> fit.  The upper oil pan
> will NOT work at all.  It MUST be a 600SL
> motor/lower oil pan.  I bought
> an S600 motor and had to swap out the upper and
> lower oil pans and oil
> pump.  Unless you have some connections, be prepared
> to pay $2000 for that
> setup alone.
> 
> The A/C manifold from the W140 engine will not work
> with the W126 neither.
>  A new manifold from a 600SL is $780.  The air boxes
> from the W140 won't
> work as well.
> 
> However, the W140 V12 has more hp than the R129 V12.
>  The 600SL is rated
> at 389hp, the 600SEL at 402hp.
> 
> Finally, the motor mounts have to be machined from
> aluminum blocks for
> correct fit.  We have a Bridgeport in house so it
> works for us.  We even
> stamped MB part numbers on the mounts for laughs.
> 
> So....buy a whole wrecked car...shop Ebay....that's
> where I bought all my
> engines from so far.
> 
> Satish
> 
> 
> > Holy cow, you must have spent over $100,000 on
> your
> > 560 SEC over the years.
> >
> > Jim
> >
> > --- Satish Tummala <satish at tummala.net> wrote:
> >> Yes.
> >>
> >>
> >> > So is the V12 now in your car?  Making this the
> >> 4th
> >> > engine the car has seen?
> >> >
> >> > David
> >> >
> >> > --- Satish Tummala <satish at tummala.net> wrote:
> >> >> Here's a quick picture...I'll post more
> later...
> >> >>
> >> >> In summary, according the the 1992 factory
> tech
> >> >> book:
> >> >>
> >> >> M120.980 6.0L V12 - 48valves, DOHC
> >> >>
> >> >> - 402hp with cat, 418hp without cat
> >> >> - 428ft/lbs of torque with cat, 440 ft/lbs of
> >> torque
> >> >> without cat
> >> >>
> >> >> - This car doesn't have cats
> >> >>
> >> >> - 3.06 LSD rear end
> >> >> - 1st gear start
> >> >>
> >> >> More later...
> >> >> > The MB Coupes Website!
> >> >> W126 SEC Mailing List
> >> >> Postings remain property of MB Coupes, L.L.C.
> >> > The MB Coupes Website!
> >> > W126 SEC Mailing List
> >> > Postings remain property of MB Coupes, L.L.C.
> >> >
> >> >
> >>
> >> The MB Coupes Website!
> >> W126 SEC Mailing List
> >> Postings remain property of MB Coupes, L.L.C.
> >>
> > The MB Coupes Website!
> > W126 SEC Mailing List
> > Postings remain property of MB Coupes, L.L.C.
> >
> >
> 
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
> 


		
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