Broken Rod Bearing

[SHOZ123]

Changed the rod bearings on my poor old '93 today. Three of the cylinders had bearings with no copper showing. Cylinder 4 had just a bit, maybe a 1/2" of copper visible. Cylinder 6 had the copper literally flaking off and Cylinder 5 the top bearing came out in two pieces with the copper flaking off of it too. It had not spun.

Anyone else have any broken bearings?

 

[texas hot rodder]

What is your mileage, and oil history? Sounds like it has had some long overdue oil changes, and hard driving, not that hard driving is bad wink

 

[SHOZ123]

yes the car has a checkered past. There is about 150k on the motor. I have had it for 2 years and put on the last 12k. I found some oil change records that were in the neighborhood of 7500 miles and Pennzoil. eek!

 

[luigisho]

Was this a maintenance thing on your part or did you notice possible bearing problems while running? I wonder if near failure of the one helped wear the others. Did you notice any crank damage/markings?

<small>[ January 04, 2003, 12:03 AM: Message edited by: luigisho ]</small>

 

[SHOZ123]

Mr Nunnally mentioned that an early sign of rod bearing failure was a knock when not under power, neither accelerating or deceleration. Apex of the power curve he said. And I noticed a slight knock on a warm engine at idle but definitely when at 3k rpms or so and off power.

There was no damage to the crank.

<small>[ January 04, 2003, 12:16 AM: Message edited by: SHOZ123 ]</small>

 

[rangerj]

SHOZ123,

Did you beat the new bearings on with a hammer? Heh, heh, heh. rangerj

 

[SHOZ123]

Not quite but when I pulled the oil pan off it looked like I had been panning for gold with all the flakes in the bottom.