Forged Redeye Engine Failure :( Why????

[16GoManGoHC2]

If it was an oiling issue then the cause is not with the main caps. What do the journals on the crank look like. What do the oiling ports on the journals on the crank look like? The caps have one purpose, that is to keep the crank attached. That's it. What do the bearing journals look like?

The oiling issue was because with the cap pushed off it seat the crush on the bearing shells was not there any more and the main bearing shell rotated just enough to close off oiling to the journal and up to the rod journal and caused a rod failure. If the studs would have been strong enough to keep the main caps in place none of that would have happened. Root cause was main studs did not hold caps down tight and allowed other things to happen because of that. The witness marks on the caps says it all, they were doing that for a bit before things progressed to failure. They were ok at 1000 and 1300 to the tire but did not like 1500 to the tire. The purpose of this thread was to point out the weakness of this engine that lead to failure was main studs due to material type were not up to the power level being made.

 

[16GoManGoHC2]

Maybe it was a material rod failure. It just let go, kaboom. Possible

Boostline rods do not usually fail without reason, they are pretty beefy rods made from some of the best steel you can get.

 

[16GoManGoHC2]

If it was an oiling issue then the cause is not with the main caps. What do the journals on the crank look like. What do the oiling ports on the journals on the crank look like? The caps have one purpose, that is to keep the crank attached. That's it. What do the bearing journals look like?

Journal on the crank looked fine, journal on the rod did not, was starved of oil due to the bearing rotating about 30 degrees from where it should have been.