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Any Issue Reusing Main/Rod Bolts?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Hilltop Hustler, Aug 12, 2025 at 11:15 AM.

  1. Aug 12, 2025 at 11:15 AM #1
    Hilltop Hustler

    Hilltop Hustler Light Load Member

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    Apr 29, 2023
    West Virginia, USA
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    So I'm going to buy a new 855 block and recycle parts. At the moment (haven't pulled heads yet only got a peep through the bottom) everything but the #2head, #2rod, head gasket, and of course rod and main bearings are getting recycled(engine block cracked on the number two piston). I am trying to watch my budget on this fix and was curious if I could reuse rod and main bolts.

    Im much more cautious using head bolts since it seems the failure came from the piston head itself. 20250804_201504.jpg
     
    Hilltop Hustler, Aug 12, 2025 at 11:15 AM
    Hilltop Hustler, Aug 12, 2025 at 11:15 AM
    #1
    BoxCarKidd Thanks this.
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  3. Aug 12, 2025 at 11:16 AM #2
    Hilltop Hustler

    Hilltop Hustler Light Load Member

    78
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    Apr 29, 2023
    West Virginia, USA
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    Excuse me not #2 head, #2 piston head
     
    Hilltop Hustler, Aug 12, 2025 at 11:16 AM
    Hilltop Hustler, Aug 12, 2025 at 11:16 AM
    #2
  4. Aug 12, 2025 at 9:46 PM #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    I would replace the rod bolts and reuse the mains if they look OK. Maybe line them up side by side. If any are longer replace them also. I could go on and on why but that is what I would do.
     
    BoxCarKidd, Aug 12, 2025 at 9:46 PM
    BoxCarKidd, Aug 12, 2025 at 9:46 PM
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    Hilltop Hustler Thanks this.
  5. Aug 13, 2025 at 6:32 AM #4
    201

    201 Road Train Member

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    high plains colorado
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    I heard any bolt that gets a torque, stretches a little bit, and new ones should always be used.
     
    201, Aug 13, 2025 at 6:32 AM
    201, Aug 13, 2025 at 6:32 AM
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    Hilltop Hustler Thanks this.
  7. Aug 13, 2025 at 6:45 AM #5
    Ridgeline

    Ridgeline Road Train Member

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    Rod bearings - OK to reuse with the same crank.

    Mains - replace

    Headbolts - replace
     
    Ridgeline, Aug 13, 2025 at 6:45 AM
    Ridgeline, Aug 13, 2025 at 6:45 AM
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    Hilltop Hustler Thanks this.
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