Yall ever seen this befor.

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

Jul 5, 2022 #1

Outlaw-trucker Bobtail Member

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Jul 2, 2022

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Outlaw-trucker, Jul 5, 2022

Outlaw-trucker, Jul 5, 2022

#1
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Jul 5, 2022 #2

Outlaw-trucker Bobtail Member

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Jul 2, 2022

0

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.

Outlaw-trucker, Jul 5, 2022

Outlaw-trucker, Jul 5, 2022

#2
Jul 5, 2022 #3

AModelCat Road Train Member

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Jul 7, 2015

Canuckistan

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Cracked pistons? Yep, seen that a few times.

I wouldn't run them.

AModelCat, Jul 5, 2022

AModelCat, Jul 5, 2022

#3

BoxCarKidd, Rubber duck kw, Bean Jr. and 2 others Thank this.
Jul 6, 2022 #4

Inderjit Medium Load Member

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Sep 17, 2017

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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

Inderjit, Jul 6, 2022

Inderjit, Jul 6, 2022

#4

BoxCarKidd Thanks this.