Quote:
Originally Posted by sranton
Thanks for the help guys. Sounds like I can rest a bit easier knowing it has the dual row IMSB! (Please, correct me if I'm wrong here) I will still plan to install an upgrade kit once it is time for a new clutch, but that won't be for a while since it was done recently.
And thanks Dennis for the clarification on interpreting the PET. Much clearer now!
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The problem with the dual row bearing is it takes too long to fail... The bearing has twice as many components to share radial and longitudinal loads, so symptoms of failure are non- existent for a long period of time. That means that the dual row bearing can be filling the oil system with ferro- magnetic debris that the oil filter will byass into the primary oil system and feed to the main and rod bearings, along with every other internally lubricated component within the engine.
We see more widespread collateral damage from dual row bearing engines than all others combined due to this characteristic. The longer an engine runs with contaminated oil, the lesser the chances are of ever resurrecting the engine once IMSB failure symptoms do present themselves.
Single row engines skip stage 3 bearing failure altogether and just break, which can be a good thing for the rest of the engine.
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