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  #1  
Old 10-04-2012, 07:36 AM
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Location: Augusta, Ga
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The Best 603 Diesel No one talks about

I submit the Best 603 engine you can own is 3.5 with the Factory campaign of Rods, bearings, head gasket. I looked until I found a 1990 350 SDL with verification documents and 75,000 miles in 1997. This engine is a superior engine to my friends 3.0 SDL in every respect. 15 yrs and 110,000 miles later it is quiet, uses 1 quart /7500 mile OCI. 80% interstate at 75-80 mph
avg 26mpg. The 126 S Class may be the consensus all time greatest automobile within reach of average people
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  #2  
Old 10-04-2012, 07:46 AM
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Location: Springfield VA
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Mine runs great too. Now that the turbo is sorted it doesn't use oil.

Does yours have one of these on the bellhousing: http://www.w124performance.com/images/OM603_misc/OM603.970_crate_engine/603.970j_tag.jpg ?

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #3  
Old 10-04-2012, 08:34 AM
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I just want to be clear on what you're saying becasue several 350SDL's have crossed my path since i started looking and it's still high on my list-

If the rodbender issue was resolved by Mercedes early in the cars life then this engine is bulletproof for a long time?

In the absence of good records, is there a way to tell?
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  #4  
Old 10-04-2012, 09:02 AM
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DD MOD, HVAC,MCP,Mac,GMAC
 
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Location: Mount Holly, NC
Posts: 26,129
the additional 500CC's has to make a difference in power and torque, but "a superior engine to my friends 3.0 SDL in every respect" could simply be a difference in upkeep between the two.
keep in mind, the 350 had no press in liners for repair/future rebuilding. the 350 even with the upgraded campain still has reported failures of the motor... the debate on why is HUGE...

the engine certainly falls under the overlooked catagory...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #5  
Old 10-04-2012, 12:58 PM
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Location: SF Bay Area
Posts: 20,186
Performance Products sells liners for the .96 and .97.

Sixto
87 300D
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  #6  
Old 10-04-2012, 01:58 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
Yup, they're in the EPC as well. They're quite expensive though.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #7  
Old 10-04-2012, 10:47 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,129
are they the bore block/insert machined in liners? cause the block has no liners stock...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #8  
Old 10-04-2012, 11:08 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
Yes, that's the procedure. I imagine there isn't much block left

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #9  
Old 10-04-2012, 11:50 PM
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Join Date: Sep 2012
Location: Augusta, Ga
Posts: 77
Quote:
Originally Posted by hertfordnc View Post
I just want to be clear on what you're saying becasue several 350SDL's have crossed my path since i started looking and it's still high on my list-

If the rodbender issue was resolved by Mercedes early in the cars life then this engine is bulletproof for a long time?

In the absence of good records, is there a way to tell?
You can find out from Mercedes by VIN# if the work was done. If you happen to know the Dealer that did the work it will be on their server. Lastly, Maintenance records are everything when buying any diesel. 2 other issues, stay away from mostly city driven 350's, these are one of the all time great open road cars. Lastly, these engines need full synthetic oil for as far back as you can determine. Low sulfur diesel fuel allows extended OCI with good synthetic oil.
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  #10  
Old 10-04-2012, 11:56 PM
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Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
I always wonder what about city driving did them in. I think it was the extra EGR. Eventually I want to map out the EGR duty cycle on my 350 compared to a 300.

My car gets driven quite hard, both in the city and on the highway. Guess we'll see how a crate engine holds up
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  #11  
Old 10-05-2012, 12:02 AM
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Join Date: Sep 2012
Location: Augusta, Ga
Posts: 77
Quote:
Originally Posted by vstech View Post
the additional 500CC's has to make a difference in power and torque, but "a superior engine to my friends 3.0 SDL in every respect" could simply be a difference in upkeep between the two.
keep in mind, the 350 had no press in liners for repair/future rebuilding. the 350 even with the upgraded campain still has reported failures of the motor... the debate on why is HUGE...

the engine certainly falls under the overlooked catagory...
I believe you'll find the 350's failing a 2nd time were not factory jobs but INDE repairs. The factory tear downs were shipped off. Only engine pull and re installation were performed at the dealer
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