Re: [MBZ] More on 350SD

[Luther]

The 300 block came in my SDL, the 350 head was found on Ebay.

Luther

Rich Thomas wrote:
Where would one find a 300 block?  Did you have that and put on the 
350 head?


--R

Luther wrote:

My SDL is a 300 block and 350 head.

Luther



Jim Cathey wrote:
6-cylinder OM603 350SD turbo diesel. We have to advice against the 
350SD because of its tendency to develop cracks in the cylinder 
head. Best buy is the 300SDL, both because of the long wheelbase 
option and the better performance (145 HP against 120 HP of the 
OM617).


So, this car I looked at supposedly had a bad head gasket, this 
seems to suggest cracking head could be a problem.  Anyone have an 
(relevant) opinion?  If I got this thing would it be a boat anchor, 
or if the head is indeed cracked, would a good one be findable?


300SDL heads crack, 350SDL rods bend.  350 heads on 300 bottoms
is what works.

-- Jim

--
Luther   KB5QHUAlma, Ark
'87 300SDL (281,xxx mi)
'85 Ford F250 6.9 diesel (x59,xxx mi) BioBeast
'82 300CD (183 kmi)
'82 300D  (74 kmi) getting donor engine-sold
'85 300D (280,176) parts car sans engine "The Accordion"


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Re: [MBZ] More on 350SD

[Mitch Haley]

Rich Thomas wrote:
Where would one find a 300 block?  Did you have that and put on the 350 
head?


Exactly. His SDL is a 1987 300.
Wilton's is a 350.

Mitch.

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Re: [MBZ] More on 350SD

[Rich Thomas]

Where would one find a 300 block?  Did you have that and put on the 350 
head?


--R

Luther wrote:

My SDL is a 300 block and 350 head.

Luther



Jim Cathey wrote:
6-cylinder OM603 350SD turbo diesel. We have to advice against the 
350SD because of its tendency to develop cracks in the cylinder 
head. Best buy is the 300SDL, both because of the long wheelbase 
option and the better performance (145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this 
seems to suggest cracking head could be a problem.  Anyone have an 
(relevant) opinion?  If I got this thing would it be a boat anchor, 
or if the head is indeed cracked, would a good one be findable?


300SDL heads crack, 350SDL rods bend.  350 heads on 300 bottoms
is what works.

-- Jim 

--
Luther   KB5QHUAlma, Ark
'87 300SDL (281,xxx mi)
'85 Ford F250 6.9 diesel (x59,xxx mi) BioBeast
'82 300CD (183 kmi)
'82 300D  (74 kmi) getting donor engine-sold
'85 300D (280,176) parts car sans engine "The Accordion"


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Re: [MBZ] More on 350SD

[Luther]

My SDL is a 300 block and 350 head.

Luther



Jim Cathey wrote:
6-cylinder OM603 350SD turbo diesel. We have to advice against the 
350SD because of its tendency to develop cracks in the cylinder head. 
Best buy is the 300SDL, both because of the long wheelbase option and 
the better performance (145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this seems 
to suggest cracking head could be a problem.  Anyone have an 
(relevant) opinion?  If I got this thing would it be a boat anchor, 
or if the head is indeed cracked, would a good one be findable?


300SDL heads crack, 350SDL rods bend.  350 heads on 300 bottoms
is what works.

-- Jim 

--
Luther   KB5QHUAlma, Ark
'87 300SDL (281,xxx mi)
'85 Ford F250 6.9 diesel (x59,xxx mi) BioBeast
'82 300CD (183 kmi)
'82 300D  (74 kmi) getting donor engine-sold
'85 300D (280,176) parts car sans engine "The Accordion"


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Re: [MBZ] More on 350SD

[OK Don]

The '86-'87 300SDL with the OM603.961 tends to crack the original head (#14)
if overheaded. I had one with well over 250k miles that was fine.

The '90-'91 350SD and 350SDL have the OM603.97x engine that bends rods, but
has the new head (I forget the number - higher than #17?).

The best combination is a 603.961 engine with the later head from a 603.97x,
or new from Rusty.
I don't think that a car with a known bad engine is worth more than $500
today.
On Wed, Mar 25, 2009 at 2:36 PM, Rich Thomas <
richthomas79td...@constructivity.net> wrote:

> So what would the numbers be on the offending and acceptable parts?
>
>
> --
> OK Don
> W124 Diesels
> KD5NRO
>
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Re: [MBZ] More on 350SD

[Kaleb C. Striplin]

the 300SDL cracks heads, the 350 bends rods

Rich Thomas wrote:
OK I am still obsessing.  Found this "official" 126 site, 
http://www.s-klasse-club.de/gb/index.html  wherein it says:


*Diesel:*
The Diesel versions were only produced for the North American export 
market. Over here, they are quite rare, therefore we have only limited 
information about their performance. Even the best MB workshops 
generally do not know how to handle these cars when they require 
service. More often than that, spare parts for these cars are sought in 
123 spare parts lists, not always the most reliable source. Most 126 
diesels in Europe are privately converted gasoline engine versions. We 
have to advise against those: Quality of such projects is hard to 
describe! Those who are looking for an original diesel should look for 
the telltale US markings: Combined mileage/kilometer counter, fat 
bumpers front and rear, English text on switches, VIN plate visible 
through the front windshield and the characteristic sealed beam 
headlights and taillights with integrated running lights. The diesel was 
available in three main engine variants: the 5-cylinder OM617 300SD 
Turbo diesel (until 1985), the 6-cylinder OM603 300SDL turbo diesel 
(only available as long wheelbase version) and the 6-cylinder OM603 
350SD turbo diesel. We have to advice against the 350SD because of its 
tendency to develop cracks in the cylinder head. Best buy is the 300SDL, 
both because of the long wheelbase option and the better performance 
(145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this seems to 
suggest cracking head could be a problem.  Anyone have an (relevant) 
opinion?  If I got this thing would it be a boat anchor, or if the head 
is indeed cracked, would a good one be findable?


--R
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--
Kaleb C. Striplin/Claremore, OK
 95 E300, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL,
 89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2,
 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D,
http://www.okiebenz.com

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Re: [MBZ] More on 350SD

[Rich Thomas]

So what would the numbers be on the offending and acceptable parts?

Here is what

http://en.wikipedia.org/wiki/Mercedes-Benz_W126
says
W126.125 	1986-1987 	300 SDL 	OM603.961 
 3.0L straight-6 
 diesel 
 	
W126.134 	1991 	350 SD 	OM603.97 
 3.5L straight-6 
 diesel 
 	
W126.135 	1990-1991 	350 SDL 	OM603.97 
 3.5L straight-6 
 diesel 




I went back and looked at the car, it is in very good shape, 185k on it, 
built 12/90.  Offered $750, guy says he wants $1k, and if it was him he 
would put a new engine in it (he owns a garage, doing that would be no 
problem, he probably knows then he would have more in it than it is 
worth).  We talked about that a bit, he thinks the car minus good engine 
is worth $1k because it is in good shape otherwise.  I figure by the 
time you dick around with the engine, whether a new one entirely or 
pulling the head and checking that out, you're into $2k territory, and 
no one is buying anything now, so that would be a crapshoot, then if you 
gotta do the whole engine transplant...  I don't know, I'll think on it 
some more.  With a good original engine it would be worth a lot more I 
would think, but the market as it is...



--R

Jim Cathey wrote:
6-cylinder OM603 350SD turbo diesel. We have to advice against the 
350SD because of its tendency to develop cracks in the cylinder head. 
Best buy is the 300SDL, both because of the long wheelbase option and 
the better performance (145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this seems 
to suggest cracking head could be a problem.  Anyone have an 
(relevant) opinion?  If I got this thing would it be a boat anchor, 
or if the head is indeed cracked, would a good one be findable?


300SDL heads crack, 350SDL rods bend.  350 heads on 300 bottoms
is what works.

-- Jim



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Re: [MBZ] More on 350SD

[Jim Cathey]

6-cylinder OM603 350SD turbo diesel. We have to advice against the 
350SD because of its tendency to develop cracks in the cylinder head. 
Best buy is the 300SDL, both because of the long wheelbase option and 
the better performance (145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this seems 
to suggest cracking head could be a problem.  Anyone have an 
(relevant) opinion?  If I got this thing would it be a boat anchor, or 
if the head is indeed cracked, would a good one be findable?


300SDL heads crack, 350SDL rods bend.  350 heads on 300 bottoms
is what works.

-- Jim



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[MBZ] More on 350SD

[Rich Thomas]

OK I am still obsessing.  Found this "official" 126 site, 
http://www.s-klasse-club.de/gb/index.html  wherein it says:


*Diesel:*
The Diesel versions were only produced for the North American export 
market. Over here, they are quite rare, therefore we have only limited 
information about their performance. Even the best MB workshops 
generally do not know how to handle these cars when they require 
service. More often than that, spare parts for these cars are sought in 
123 spare parts lists, not always the most reliable source. Most 126 
diesels in Europe are privately converted gasoline engine versions. We 
have to advise against those: Quality of such projects is hard to 
describe! Those who are looking for an original diesel should look for 
the telltale US markings: Combined mileage/kilometer counter, fat 
bumpers front and rear, English text on switches, VIN plate visible 
through the front windshield and the characteristic sealed beam 
headlights and taillights with integrated running lights. The diesel was 
available in three main engine variants: the 5-cylinder OM617 300SD 
Turbo diesel (until 1985), the 6-cylinder OM603 300SDL turbo diesel 
(only available as long wheelbase version) and the 6-cylinder OM603 
350SD turbo diesel. We have to advice against the 350SD because of its 
tendency to develop cracks in the cylinder head. Best buy is the 300SDL, 
both because of the long wheelbase option and the better performance 
(145 HP against 120 HP of the OM617).


So, this car I looked at supposedly had a bad head gasket, this seems to 
suggest cracking head could be a problem.  Anyone have an (relevant) 
opinion?  If I got this thing would it be a boat anchor, or if the head 
is indeed cracked, would a good one be findable?


--R
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