I pulled one rod cap and found this. Replace them all? Is this normal for 800K mile bearings? Cat C12 engine.
Rod bearing wear - replacement needed?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by windsmith, Jul 29, 2019.
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Looks good to me for 800k. I'd say it's been taken care of.
If your allready in there, roll in new ones.windsmith Thanks this. -
Goodysnap Thanks this.
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Looks like it's worn through the copper?
You have to change them. -
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I didnt see any copper either. The wear in the center on the top bearing looks normal to me for the milleage. The bottom looks great. Poorly maintained engines will have rotational deep grooves down to the copper form dirt and contamination in the oil system from the bypassing the plugged filter.
I'd like to see #4 main, but suspect you'll see more of the same. What rod is this?pushbroom, Dino soar, windsmith and 1 other person Thank this. -
Different engine, but looks similar to mine with 600k or so on them in my E7.
I also had a few that were scored like Goodysnap mentioned. Believe it was #3 and 4.
Just rolled new rod and mains two weeks ago in my Mack. Well worth the work in my opinion.
Personally, I would do them all while you have the pan off and polish the crank while youre in there.windsmith Thanks this. -
I wouldn't even consider replacing just one cylinder assembly with that kind of usage on the engine. I'd be rebuilding it too since its already torn apart.
Dino soar, windsmith and jamespmack Thank this. -
I pulled #6 rod and it shows the same wear. I pulled #7 main while I was under there, and it showed minor discoloration on about 1/4" of the forward edge on the lower shell. Upper shell looked like new.
I'm going to pull the rest of the rods and packs today and post pictures if anyone's interested. I figured I'd let it drip overnight so it's not raining oil on me. I'll wait to do the mains when my parts come in.DieselDrivinDaddy and Goodysnap Thank this. -
Forgot to mention, the bearings were rolled in at 750K per the service records. The ECM shows 1.6M on the engine, and AFAIK there's been no overhaul done. Build year is 1999. I guess it's time.Last edited: Jul 30, 2019
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