Quote:
Originally Posted by semcoinc
Outstanding Beast Mode finale Danny!
Quick question, with the engine all that far opened up, what would you think of pulling the heads off and doing a valve job on the heads if someone were all that far in?
When I get up around 150K, I'm going to be in touch with you. With a head job and all the chains and guides done, you've got what we call in the piston aircraft world, a complete "Top" overhaul.
Once an engine was done like you've done it, I could see it delivering another 100K miles assuming the bottom end bearings were treated to nice oils.
Mike
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In theory it wouldn't be all that much more work to pull the heads off, since you need to remove all the timing components anyways. That being said, if I were removing the heads I would just do this whole rebuild as an engine-out job. Doing a head job with the engine still in the X5 would be miserable, there's hardly any room on the sides of the engine.
I personally didn't see a reason to do a valve job— the engine never really went out of time so the pistons and valves never met. Thankfully the dealer that was selling it at the time stopped driving it completely once the guides went.
Yeah, I don't foresee anything going wrong for the next 100k miles, aside from the usual stuff (alternator/water pump/pulleys/ignition coils). I don't think there are any issues with the rod bearings, given that it's still a pretty low-revving engine that uses regular oil, versus a high-revving exotic oil-using engine like an S54. I'll send off an oil sample for analysis when I do my next oil change, just to see how everything is.