connecting rod damn-age

[fatmobile]

When you put the piston pin in the rod bushing there should be NO slop.
 They are normally installed and reamed to fit.
 
 The surface area of the bushing is much smaller than the rod bearings, all the same pressures are on the smaller surface area.

[billybobf]

just doesnt see the rotation that the big end takes

[BigVWman]

Aren't the rods matched in weight group sets? Was the single the same weight group as the other 3? I'm not sure if its super critical merely mentioning it since i would suspect it could cause unusual engine vibration if diff size.

[maxfax]

Aren't the rods matched in weight group sets? Was the single the same weight group as the other 3? I'm not sure if its super critical merely mentioning it since i would suspect it could cause unusual engine vibration if diff size.

Yes...  Considering these things vibrate anyhow chances are it wouldn't be too noticeable, but not good for anything either.. From past experience I've found that if you are replacing one rod it needs to be at least close to get it matched to the rest..  Don't want to have to take too much material off..

[wdkingery]

Yes Bentley would suggest replacing them in fours even. But he can eat it. I threw that rod on, didn't weigh it, it doesn't vibrate. It runs fine actually. If it runs long term I'm a hero

[maxfax]

I've mixed and matched in the past with no short term ill effects..  They lasted till something else blew apart..    I must say, the one engine I had balanced (rods were within IIRC 2 grams difference) was amazing smooth...