Why is one connecting rod red?

[YY1]

Found this yesterday.

The rod, the cap and the bots and nuts have a red hue.

The engine ran great and only has 60K original miles.

 

[not so famous bob]

Found this yesterday.

The rod, the cap and the bots and nuts have a red hue.

The engine ran great and only has 60K original miles.View attachment 359167

looks rusty in the pic. maybe embarrassed !-LOL

 

[PurpleBeeper]

Either that rod is rusty(?) or maybe somebody magnafluxed that particular rod at one time looking for cracks.

 

[khryslerkid]

Maybe pull that cap and look for scaring. It might have run hot...

 

[727]

I have a stock set of 383 rods that have a copper plating on them. Looks like the one in your pic. Not sure why the plating is there. Maybe to prevent stress risers.

 

[YY1]

Maybe pull that cap and look for scaring. It might have run hot...

Is that what normally happens if it's run hot?

I don't think I've ever seen that.

It did run a bit hot when the last freeze plug went, but nothing I wasn't more than mildly uncomfortable with.

I drove it several times after that for short distances and no hard starting, or anything like that.

 

[kiwigtx]

Maybe pull that cap and look for scarring. It might have run hot...

Fixed it for you..unless you actually meant that the rod was scared? In which case I can see why it would be red.

 

[68 HEMI GTS]

Big end was out of spec so it was dipped in copper from the factory and re honed.

 

[Cranky]

Big end was out of spec so it was dipped in copper from the factory and re honed.

Have heard of that before and it makes sense. I also have some 'B' engine rods that are done that way...

 

[khryslerkid]

Big end was out of spec so it was dipped in copper from the factory and re honed.

Are you referring to the weight being out of specs?

 

[YY1]

Interesting......

 

[Photon440]

 

[Ranger16]

Is that what normally happens if it's run hot?

In order for it to get discolored by overheating, the engine would have had to have been red hot (and probably would have seized) and all the others would look the same.