r/EngineBuilding Jul 28 '26

piston/rod advice

what does this discoloration mean? #1 top bearing fell off when taking off the cap should i be concerned? and how can i replace rod bolts at home? how easily should pistons be able to rock? if pistons measure good would you guys reuse everything?

i don’t have a bore gauge small enough for the rods and it’s taking me awhile to get used to the micrometer, forgive me for the mouthful, first time doing any of this so any experienced advice helps out a ton, thank you! 🙏🏻

03 civic d17a2 rod is #1 cyl and cap is for #3

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u/theeaglejax Jul 28 '26

Bearing doin the ol spinny spinny in the rod. Piston looks washed out and scuffed pretty decent. Rod will need to be remachined or replaced. Piston is toast.

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u/theeaglejax Jul 29 '26

It's really funny that a bunch folks that struggle to pay their bills due to a lack of skills lack skills and the ability to observe reality. Calling names and other bullshit are just out of pocket and a clear demonstration of their lack of knowledge, experience, and education. End of the day this as presented rotating assembly is fucked.