Yall ever seen this befor.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Outlaw-trucker, Jul 5, 2022.

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  2. Outlaw-trucker

    Outlaw-trucker Bobtail Member

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    Jul 2, 2022
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    After removal of the heads for the injector sleeves to get replaced I found one broke valve spring.and. I noticed 3 of the 6 pistons have a couple lil cracks. Hairline deals...that normal or I need to replace them.. its a recon engine..ran great.
     
  3. AModelCat

    AModelCat Road Train Member

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    Cracked pistons? Yep, seen that a few times.

    I wouldn't run them.
     
  4. Inderjit

    Inderjit Medium Load Member

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    That is common for a high hour engine. The cracks will continue until they reach the Ni-Resist insert that the top ring is in. The crack will eventually burn through or a chunk of the piston crown will come off sometimes with parts of the insert. Does a huge amount of damage.
     
    Last edited: Jul 6, 2022
    BoxCarKidd Thanks this.
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