Rust stains in cylinder walls

[340GTSport]

Thoughts about eng blocks that have been board an honed that have stains in the walls from where water had once been inside ?

 

[RustyRatRod]

Thoughts about eng blocks that have been board an honed that have stains in the walls from where water had once been inside ?

Run it. You'd be shocked at how much surface rust there is on engines that sit up for some time. Another example is brake rotors.

 

[Plymouth 65]

Agreed, as long as size and finish are correct assemble and go. 65

 

[MOPAROFFICIAL]

Should be fine. Post a pic if you want

 

[Bewy]

If it has been bored & honed......& the stain was not removed during honing, it suggests the 'stain' might be a depression [ rust ] in the bores.

 

[340GTSport]

If it has been bored & honed......& the stain was not removed during honing, it suggests the 'stain' might be a depression [ rust ] in the bores.

Can u please elaborate I’m not sure what you mean .

 

[Bewy]

If rust is still visible after honing, then there is a hollow/groove in the bore that the honing stones did not touch. That means the piston rings are also going to pass over this gap. This gap will allow blowby & power loss. It will also allow oil to pass the rings & get into the chamber.
A pic would help.

 

[RedFish]

I sure don't want to argue with anyone. Imagine a ink stain in your fingerprint. That is a very poor finish compared to a crosshatch honing.
This is a good read if it works.
And it don't work. Sorry

 

[Newbomb Turk]

I sure don't want to argue with anyone. Imagine a ink stain in your fingerprint. That is a very poor finish compared to a crosshatch honing.
This is a good read if it works.
And it don't work. Sorry
View attachment 1716461390

No one I know uses RMS to describe the surface geometry of a cylinder bore.

If the rust stain isn’t proud, send it.

It will hold a skosh more oil and that’s not a bad thing.

 

[Icetech]

Run a ring down the cyl to the spot.. put a flashlight under and see if you see light... not exact but at least and idea of how bad it might be then...

 

[Demonracer]

Get your machinist to check it for roundness. It's probably good to go, I've run freshly machined blocks with some rust stains with no problems.












get

 

[340GTSport]

Guess I just load it up in the truck and get it checked out like demonracer said other wise I’ll just be thinking back and wondering. I think they were all good replies but. Then. U would always wonder.