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  #1  
Old 07-23-2002, 09:58 PM
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Con rod weight

I regards to the rebuild of my '80" 240d engine, I have run into a snag and could use some help. The block is at the machine shop ready for sleeves and new pistons. Two con rods are NG so I got a couple from another 240d but they are close to 20 grams more in weight (ea). Can not my rods be ground down to match the weight of the lighter ones? And if that is done would that affect the balance of crank, flywheel or what ever? The shop seems reluctant to chop 20 grams off two rods.
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

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  #2  
Old 07-24-2002, 01:08 AM
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Yes,there are two different sets of rods for that engine. You seem to have been lucky to have found a knowledgeable and concientious machine shop.You are probably going to have to get another pair. What weight do you need? perhaps someone in this group has some.

Good luck,
Peter
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  #3  
Old 07-24-2002, 10:44 AM
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" Peter

Thanks for that. The heavier of the two sets, which is what I need ,are between 868 and 866.9 grams. The mechinest could not see any numbers that would really distinquish between the two types. Both have 616 502 cast in and something about a smaller number over another number that seemed differant. I would think that there would be something really obivious with such a big differance . In other words if someone should have a couple of rods it might be hard to know which they were without a gram scale. If anyone should have what I need I would be most greatfull. contect me on the forum or at fidlersg@olympus.net
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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  #4  
Old 07-24-2002, 11:25 AM
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Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
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Steve,
That's exactly why I used a tripple beam scale when I used to buiold them back then. I'll look around the shop.

Peter
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  #5  
Old 07-25-2002, 12:17 AM
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Peter

I put out a plea on the MB news group also but how many people have a gram scale in their shop? hopefully you'l find a couple rods lying around . Thanks for your help. Have a good evening.
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #6  
Old 07-25-2002, 12:54 AM
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Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
Posts: 2,225
Triple beam scales are a must for building engines. I used to use the scale in the days of the M110 engine with solex carb to check for heavy floats. They are also great for counting small widgets for inventory. I know a guy who owns a company that designs and manufactures body piercing jewelry;his little one small building company did over a million dollars last year. You can imagine how a triple beam scale could quickly count those expensive little puppies. At any rate I am checking around with other shops for a couple of rods.

Good luck,
Peter
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