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Next week I'm yanking the motor on my 6.0, cab on. Its been leaking oil from the bed plate. So I've decided to pull it and replace the seals. In the process I'm studded the heads . The motor has 230k on it . Had a tuner on it for about 20k miles. Towing a 40 foot toy hauler about 4k miles. Im trying to figure out weather to do the rings and bearings. What should be the deciding factor?
If you are doing the bedplate, you might as well also inspect the rod bearings. As far as the rings, inspection to see how much of a wear lip is formed, and measuring the cylinders for wear when the pistons are cranked low. At 230k, ring life is about half of my expectations, so it's a toss. But at 230k and rings, I'd be doing a bore out to the next size, so now you're at the point of close to a full rebuild.
In my opinion, studs are highly, highly overrated. The problem is the heads tenting, and if that's occurring, between machining the heads, grinding the valves, and probably addressing the guides, you're pushed even more to a full rebuild.
So the question really becomes, how much to bandaid or a full rebuild.
At 230K MILES, I would be questioning the lifespan of the cam lobes and roller lifters. Considering to replace the cam would mandate removing the crank, checking it over while you have it out and apart would be very wise.
At 230K MILES, I would be questioning the lifespan of the cam lobes and roller lifters. Considering to replace the cam would mandate removing the crank, checking it over while you have it out and apart would be very wise.