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#1
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Rod bearings: replacement on M130
I have got bad rod bearing(s) on the 1971 W114. The noise sounds like a SICK ENGINE.
![]() When I remove the caps and inspect the crankshft, and if I find no evidence of scoring or gouging on the crank journals, will a replacement set of rod bearings fix the car? Otherwise, its' headed for the boneyard. Sad to see end up there, there is no little rust.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old |
#2
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I would get some plastigage wax rods to measure the bearing clearance and see if they are in spec.
http://www.hastingsmfg.com/Tools/plastigage.htm
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Bill Reimels Now down to one: 1972 300SE 3.5 W109 (Euro delivery) |
#3
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I'll mike the cranshaft...
the best I can tomorrow, from underneath the engine. I drained the oil into a pail with a pourus fabric on top, but I didn't find any metal particles. I expected something. Maybe the rod bearing hasn't spun and destroyed the crankshaft.
Those oil pan hex bolts are tedious. The engine shock absorber prevents me from removing one bolt. I cannot figure out how to remove the shock absorber. I got the bottom nut off, but the top of the shock absorber disappears behind the harmonic balancer. Any ideas? (besides a Dremel)
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old |
#4
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Its been a while but I believe I was able to get a wrench on the top bolt and spin the shock body with pliers. Not the factory method I'm sure, but it worked.
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Bill Reimels Now down to one: 1972 300SE 3.5 W109 (Euro delivery) |
#5
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Thanks for the reply
I guess I have to search harder.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old |
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