This is an interesting and independent anecdotal data point from a very reputable source. Up till now these 'big bearing' cars had a better reputation for IMSB longevity than either the double row or single row OEM cars. Maybe time and miles are beginning to tell .The interesting question is-what is causing the failure in the big bearing engines - load or lubrication or...?Supposedly the load issue is solved with the larger bearing but the ball bearing speed is much higher ......What an opening for Vertex !
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Originally Posted by itsnotanova
I'd almost have to agree with his indy. The 2003-05.5 engines are dropping like flys lately. I've been getting calls from people looking for a motor at least once a week. That's a lot! I don't get to see why the 3 chain motor is failing so much lately but I'm starting think the 3 chain has more flaws than the 5 chain. I also have to agree with his decision to drop the motor and trans as one. "IF" he's also going to be replacing the AOS and vacuum hoses too. It doesn't take much more of an effort to drop the engine/trans as it does for a trans by itself.
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