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Old 05-25-2000, 10:26 AM
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Hi, This ted again, still working on rebuilding my turbo diesel 617 engine. The #1 rod journal spun a bearing and is beyond tolerance for re-surfacing and my machinist wants to know if it is possible to build-up the journal and then regrind it to tolerance? This he has done with gas engines, but has never attempted doing it on a diesel crank. Any suggestions?
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Old 05-25-2000, 09:24 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
There are four repair sizes to the rods. I would hope this would cover it. I suppose the crank could be built up but all machining on turbo diesel cranks must be followed by a nitride bath, surface hardening. This can only be done at a few places nationally.

Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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Old 05-28-2000, 04:38 PM
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As Steve said, these journals are hardened. This is a diesel engine with 21 to 1 compression, don't even think about reusing the crankshaft without re-hardening the journal. If you do, you will be tearing it down all over again soon, or pulling out the engine to sell it as junk iron.

Good luck,

Larry Bible
'84 Euro 240D, 516K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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