Comp R Lifters Fail (Pics) What would cause this?
#21
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You rarely see more than one rod or pair fail on an engine, given it kinda stops running after that. ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Not sure what condition 7/8 bearings were in when he disassembled the engine, that will likely tell the story of whether it was oil starvation or a localized blockage (metal got into the #3 crank main and passed downstream to the 5/6 rod journal.)
Interesting data point: Bondurant lost several engines on their school's C5 Vettes initially with the same failure mode, #4 rod bearing. Not 7/8, just 4. Upping to 15W-50 and overfilling resulted in no further blown engines. Go figure.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Not sure what condition 7/8 bearings were in when he disassembled the engine, that will likely tell the story of whether it was oil starvation or a localized blockage (metal got into the #3 crank main and passed downstream to the 5/6 rod journal.)
Interesting data point: Bondurant lost several engines on their school's C5 Vettes initially with the same failure mode, #4 rod bearing. Not 7/8, just 4. Upping to 15W-50 and overfilling resulted in no further blown engines. Go figure.