the rod & main bearings

Discussion in 'Ask An Owner Operator' started by bigtruckisgood, Jul 10, 2007.

  1. Jul 10, 2007 #1
    bigtruckisgood

    bigtruckisgood Bobtail Member

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    Jul 10, 2007
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    Hi everybody .I just bought a 1997 Volvo wia.It has around 850000 miles on it.I been told that to be safe i need to change the rod & main bearings.Can anybody explain to me what the reason to do this.Thank you.
     
    bigtruckisgood, Jul 10, 2007
    bigtruckisgood, Jul 10, 2007
    #1
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  3. Jul 10, 2007 #2
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    the road less travelled
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    Engines are made to run within a tolerance of clearances, as the bearings wear, these clearances increase to the point where the tolerance is exceeded and the part can fail. Connecting rods can break and bearings can seize to the crank causing a spun bearing and a damaged block and crank that is usually cracked but at a minimum has to be reground. Rods and mains is called by some a precautionary rebuild. There are other things usually done at the same time.
     
    25(2)+2, Jul 10, 2007
    25(2)+2, Jul 10, 2007
    #2
  4. Jul 10, 2007 #3
    bigtruckisgood

    bigtruckisgood Bobtail Member

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    Jul 10, 2007
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    Thank you for the information 25.Sorry but I dint mention that she has 12.7L detroit.I just made a call to the detroit guys and they said that those engines dont need the rods and main bearings change at 850000 mls.I didnt know this.
     
    bigtruckisgood, Jul 10, 2007
    bigtruckisgood, Jul 10, 2007
    #3
  5. Jul 12, 2007 #4
    broncrider

    broncrider Road Train Member

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    of all the newer engines, detriots are the ones id be worried about, but in the major manufacuter maintence manuals, none of them call for a minor rebuild until 1,000,000 miles or a very high # of operation hours ( i dont remember what it is...evan approximitly)

    better materials, quality control and everyone having a firm grasp on PM is the reason i was gave
     
    broncrider, Jul 12, 2007
    broncrider, Jul 12, 2007
    #4
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