On Sun, 19 Jun 2005 21:55:34 -0400, Chas Hurst wrote:
Yuck. I just bought a 84 'Euro' (some cool stuff, like rear headrests,
cloth seats, small bumpers, and power front, crank rear windows) 300D with
a locked-up engine that stopped "suddenly". I haven't had time pop the
valve cover, but this sounds real likely. So when you say "A bunch of
parts", what typically get's lunched? I would assume some bent valves, and
one or two pistons with valve prints on them - but then the nightmares
start - are the connecting rods robust enough to stand up to this kind of
abuse - and, worse yet, how stout is the crankshaft - that flywheel is
pretty heavy, and I would imagine it's trying real hard to twist the
crankshaft during the split second when the pistons are introducing
themselves to the valves.
And one further question - I understand that there are different timing
chain/sprocket options for these engines - specifically single vs. double
row. Anyone know about this, how interchangable the two are and how
desirable any such change would be?
All the diesels have 2 row chains. The last engine I repaired that suffered
a broken timing chain had a broken camshaft, a coupla broken cam bearing
stands, a few bent valves, a broken chain of course, cam sprocket ruined,
injection pump sprocket or as Benz calls it "timing device"- ruined, this is
an expensive item, and a crankshaft sprocket ruined. Plus new gaskets and
seals, timing chain tensioner and rails. This adds up to big bucks for
parts, plus about 20 hours in labor. It's conceivable that more damage could
The customer really liked the car-a 1980 300SD- and spent more money than
the car was worth to repair it.
On Tue, 21 Jun 2005 17:52:59 -0400, Chas Hurst wrote:
Many thanks. I'm surprised pistons weren't on the list- they must be
pretty tough. If this can be done in 20 hours, I'm guessing that either
you're pretty fast, or that one doesn't have to pull the engine to replace
the timing chain goodies.
I don't know how to determine what these cars are worth. By one measure,
it's worth what you can get one for on eBay. Or what you find in one of
the Bluebooks. But I think you could put $10k into restoring one of these
beauties, and have much more car for a much longer time than you could get
with by just buying a $10,000 chevy. No?
Yes, if you are willing and able to fix the things that will break. If
you need to have a shop fix everything then it's simply too expensive.
The other consideration is parts cost. Parts for say a 300D are
reasonable because of the model's relatively large population, but
that's not so for low volume models like a 6.9 V-8 or V-12 for example.
And buy and "expensive" car - that's one that's in premium condition and
has a complete maintenance record for it will be cheaper to own that
some old dog that really should be in the bone yard.
As I said, it's conceivable more damage could occur. In the example I posted
it was unneccesary to pull the engine, so the major portion of the labor is
removing the head which is not a big deal especially when the timing chain
is already broken.
What a car is worth is purely a personal matter. If I had $10k to spend, I
would by a Benz I can drive away. Check Kelly's BB, you'll be surprised how
much of a Benz $10k will buy.
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