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Author Topic: M130  (Read 1249 times)

Saman 280SL

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  • USA, CA, Los Angeles
  • Posts: 35
M130
« on: October 28, 2019, 04:10:42 »

1970 280Sl M130
So I was changing my oil and saw metal bits
Engine runs fine but long story short I pulled the engine and the crank last bearing toward transmission is totally shot and almost disintegrated. 
Pulled crank out and sent to machine shop. 
Now I need .50mm bearing set
The engine was rebuilt 10 years ago
Btw presently compression is 150psi all 6
Q-1. Does that sound about right?
(.50mm)
Q-2 What could be the cause of one bearing failure ?
TIA

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1969 280SL 050 Cognac
1970 280SL 180 Black
1971 280SE 3.5 180 Black 111
1970 280SE  LG 904 Cognac 111
1970 280SE LG 180 Bamboo 111
1989 560SL
1994 E320 Cab.
124-1995 E320 Cab.
251-R350-4Mat

ja17

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Re: M130
« Reply #1 on: October 28, 2019, 14:50:08 »
How was your oil pressure? Did you see it decline over time? The bearing failure could be the result of the bearing not breaking in properly, possible debris contamination lack of lubrication, or improper installation. Be sure to clean all oil galleries and the oil cooler and line or it can happen again.
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Saman 280SL

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  • USA, CA, Los Angeles
  • Posts: 35
Re: M130
« Reply #2 on: October 28, 2019, 16:31:32 »
I've had the car since 1992- oil pressure great and no significant decline. I use 20W50 all the time and compression is 150 all 6
driveability and performance great.
I'm thinking it's due to improper install of that bearing- (didn't confirm proper seating before torque down?)
My question is going to oversize .50mm seems right?
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1969 280SL 050 Cognac
1970 280SL 180 Black
1971 280SE 3.5 180 Black 111
1970 280SE  LG 904 Cognac 111
1970 280SE LG 180 Bamboo 111
1989 560SL
1994 E320 Cab.
124-1995 E320 Cab.
251-R350-4Mat

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7313
Re: M130
« Reply #3 on: October 28, 2019, 21:06:26 »
The damage to the crankshaft will dictate the size of the new bearings. Your machinist should be able to tell you which size the crankshaft will clean up to.
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Saman 280SL

  • Inactive
  • Junior Level
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  • USA, CA, Los Angeles
  • Posts: 35
Re: M130
« Reply #4 on: October 28, 2019, 23:12:57 »
they recommend  .50mm
Thanks for your help
Logged
1969 280SL 050 Cognac
1970 280SL 180 Black
1971 280SE 3.5 180 Black 111
1970 280SE  LG 904 Cognac 111
1970 280SE LG 180 Bamboo 111
1989 560SL
1994 E320 Cab.
124-1995 E320 Cab.
251-R350-4Mat
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